ON MICROSCOPIC DISCOVERY. 



633 



other and bent back. 19. Leucophra, noduiata. Oblong, 

 oval, with a double row of little nodules. 20. Leucophra 

 siffnuta. Oblong, subdepressed, with a black margin, 

 filled with little molecular globules. 21. Leucophra 

 trii/omt. Thick, obtuse, angular, yellow. 22. Leucophra 

 jlnida. Kidney- shaped, ventricose. 23. Leucophra 

 //./. Reniform, sinuated. 24. Leucophra armilla. 

 Described. 25. Leucophra cornuta. Described. 26. 

 Leucopkra heteroclita. Cylindrical, forepart obtuse, 

 hind part furnished with a double tufted organ, which 

 it can thurst in and out at pleasure. 



XIII. TRICHODA. An invisible, pellucid, 

 hairy worm. 



Plate 35, fig. 55. Trichoda vulgaris This 

 animalcule has a crustaceous covering in the 

 shape of a cup, at the circumference of which 

 radiate several strong spines. Its polygastric 

 structure may be seen in the figure. 



Plate 27, fig. 37. Trichoda sol This 

 splendid creature constitutes a new genus, but 

 as we know of no more of the same kind, it 

 is introduced here. It is a little crystalline, 

 round corpuscule, the upper part convex; it is 

 beset with innumerable diverging rays, which 

 are no longer than the diameter of the body, 

 proceeding from every part of its surface : the 

 inside contains as many as twenty polygastric 

 sacs. The body contracts and dilates, but 

 the animalcule remains confined to the same 

 spot. 



Plate 27, fig. 38. Trichoda cometa. A 

 pellucid globule, replete with bright intestines, 

 the fore-part furnished with hairs, the hind- 

 part with a pellucid appendant globule. 



Plate 27, fig. 53. Trichoda bomba.k 

 thick animalcule, and of a yellow colour ; 

 pellucid, and replete with clay-like mole- 

 cules ; it is very lively, moving about with 

 so much velocity, as to elude the sharpest 

 sight, and most determined observer, and as- 

 suming various shapes, sometimes appearing 

 spherical, sometimes reriiform, or kidney- 

 shaped, and sometimes as in the figure. 



TRICHODA SPECIES. 



1. Trichoda grandlndla. Spherical, pellucid, upper 

 part hairy. 2. Trichoda cometa. Described. 3. Trickoda 

 yranata. Spherical, centre opaque, the circumference 

 hairy. 4. Trichoda trochus. Pear-shaped, pellucid, each 

 side of the fore part distinguished by a little bunch of 

 hairs. 5. Trichoda yyrinus. Oval, round, crystalline, 

 the front hairy. 6. Trichoda sol. Described. 7. 

 Trichoda solans. Spheroidal, with a few hairs round 

 the circumference. 8. Trichoda bomba. Described. 

 9. Trickoda orbis. Orbicular, the fore part notched and 

 hairy. 1(1. Trichoda urnula. In the form of a water 

 pitcher, the fore part hairy. 11. Trichoda diota. Pitcher- 

 shaped, fore part smallest, upper part of the mouth 

 ciliated. 12. Trichoda horrida. Somewhat conical, 

 fore-part rather broad and truncated, lower part 

 obtuse, the whole covered with radiating bristles. 13. 

 Trichoda urinarium. Egg-shaped, with a short hairy 

 beak. 14. Trichoda semiluna. Semiorbicular, fore part 

 hairy underneath. 15. Tricltoda trigona. Convex, fore 

 part ciliated, hind part apparently torn away. 16 

 Trichoda tinea. Clubbed, fore part hairy, hind part 

 large 17. Triclioda nu/ra. Oval, compressed, fore part 

 broader and hairy. '18. Trichoda pubes. Egg-shaped, 

 oblong, forepart depressed. 19. Trichoda floccus. 

 Membranaceous, fore-part rather conical ; three small 

 papilhe project from the base, which are set with hairs. 

 VOL. n. 



20. Trichoda sinuata. Oblong, depressed, one margin 

 hollow and hairy, the lower end obtuse. 21. Trichoda 

 prceceps. Membranaceous, somewhat lunated, protu- 

 berant in the middle, a row of hairs on the outside. 22. 

 Trichoda proteus. Oval, the lower part obtuse, with a 

 long neck, which it has the power of contracting or ex- 

 tending. 23. Trichoda versatilis. Oblong, hind part acute, 

 with a neck that it can extend or contract at pleasure, 

 under part of the extremity of the neck hairy. 24. Trich- 

 oda gibba. Oblong, with a hunch on the back, the belly 

 hollowed out, the fore part ciliated, both ends obtuse. 

 25. Trichoda f oeta. Oblong, with the back protuber- 

 ant, the fore part ciliated, both ends obtuse. 26. 

 Trichoda patens. Long, round, a long hole in the fore 

 part, with the edges ciliated. 27. Trichoda patula. In- 

 clining to oval, with a small tube at the fore part, the 

 upper end covered with hairs. 28. Trichoda foreata. 

 Oblong, rather broad, three little horns on the fore 

 part, hinder part beardless. 29. Trichoda striata. Ob- 

 long, one edge rather curved, and furnished with a row 

 of hairs, both extremities obtuse. 30. Trichoda uvula. 

 Rather flat and long, of equal size throughout, fore 

 part hairy. 31. Trichoda aurantia. Sinuated, oval, 

 fore part broad, apex hairy to the middle. 32. Trichoda 

 iynita. Oval, apex rather acute, the under part fur- 

 rowed, the furrows hairy. 33. Trichoda prisma. Oval, 

 under part convex, upper part compressed into a kind 

 of keel, the fore part small. 34. Trichoda forceps. Oval, 

 with a pair of forceps at the fore part, with unequal 

 hairy legs. 35. Trichoda forf ex. Round and prominent, 

 the fore part formed into a kind of forceps, and two 

 small protuberances. 36. Trichoda index. Obovated, 

 under part of the front of the margin hairy, apex formed 

 by the fore part, projecting like the finger on a direc- 

 tion post. 37. TrichodaS. Striated, fore part ciliated, 

 the extremities bent in opposite directions. 38. Trich- 

 oda navicula. Three cornered, fore part truncated and 

 ciliated, hind part acute, and bent a little upwards. 

 39. Trichoda succisa. Flattened, oval, edge hairy, hinder 

 part hollowed out so as to form two unequal legs. 40. 

 Trichoda sulcata. Ovated, ventricose, apex acute, with 

 a furrow at the abdomen, and both sides of it ciliated. 

 41. Triclioda anas. Long, the apex of the neck un- 

 derneath hairy. 42. Trichoda barbata. Long, round, 

 the under part from the apex to the middle hairy. 

 43. Trichoda farcimen. Long and thick, surrounded 

 with small bristles. 44. Trichoda crinita. Long, round, 

 everywhere ciliated on the upper part, and also on the 

 under part as far as the middle. 45. Trichoda angulus. 

 Angular, the apex hairy. 46. Trichoda linita. Oblong, 

 with prominences at both extremities. 47. Trichoda 

 paxillus. Linear, flat, fore part truncated and hairy, 

 the hinder part obtuse. 48. Triclioda vermiadaris. ( 

 Long, cylindrical, with a short neck, the apex hairy. 

 49. Trickoda melitcea. Oblong, ciliated, with a dilatable 

 neck, the apex globular, and ciliated, and a kind of 

 peristaltic motion observable in it. 50. Trichoda fimbri- 

 ata. Obovated, the apex hairy, the hinder part ob- 

 liquely truncated and serrated. 51. Trichoda camel us. 

 Thick, fore part hairy, with notches on the middle and 

 each side. 52. Trichoda augur. Oblong, depressed, 

 pellucid, and filled with molecules, vertex truncated, 

 fore part forming a small beak, underneath are three 

 feet, the hinder part is furnished with bristles. 53. 

 Trichoda pupa. Hooded, front hairy, the tail inflected, 

 at the lower part of the head is a large pellucid cor- 

 puscule. 54. Triclioda hinaris. Arched, round, the 

 apex hairy, the tail bent. 55. Trichoda Munis. Arched, 

 flattened, the apex hairy, and tAvo little bristles pro- 

 ceeding from the tail. 56. Trichoda rattus. Oblong, 

 with a kind of keel, the fore part hairy, and a very long 

 bristle proceeding from the hinder part. 57. Trichoda 

 tup-is. Long, and somewhat cylindrical, apex hairy, 

 the tail divided into two long bristles. 58. Trichoda 

 pocillum. Oblong, fore part truncated and hairy, the 

 tail articulated, and divided into two bristles. 59. 

 Trichoda clavus. Fore part round and hairy, hind part 

 furnished with a sharp tail. 60. Trichoda cornuta. 

 Upper part convex, under side plane, apex hairy, tail 

 linear, and simple. 61. Triclioda gallina. Long, fore 

 part sinuated, the front hairy, the tail formed of small 

 hairs. 62. Trichoda musculus. Egg-shaped, fore part 

 hairy, the tail projecting from the under part. 63. 

 Trichoila delpliis. Clubbed, front hairy, the tail small 





