1903.] NATURAL SCIENCES OF PHILADELPHIA. 395 



Fig. 16. — An entire individual enclosed within its gelatinous tube, ventral 



view, the larger longitudinal muscles sho'wn. 

 Fig. 17. — Germarium, from a stained preparation. 

 Fig. 18. — Mastax, postero-dorsal view. 



Figs. 19-21, Floscularia ambigua. 



Fig. 19. — Germarium seen from left side of the body. 



Fig. 20. — Dorsal view of anterior body region, musculature and corona 



cilia not shown. 

 Fig. 21. — Immature individual pressed from the egg, seen from the right 



side; the musculature and mastax not drawn. 



Pl.\te XX, Figs. 22-24. — Floscularia coroneUa. 



Figs. 22, 23. — Lateral (from the left side) and dorsal views of anterior portion 

 of the body; the cilia of the coronal lobes not dra-s\Ti, and only a 

 portion of the musculature. 



Fig. 24. — Posterior end of foot with its peduncle. 



Figs. 25, 26. — Floscularia conklini. 



Fig. 25. — Anterior portion of body seen from the left side, mastax not drawn, 



and only a portion of the musculature. 

 Fig. 26. — The entire animal with its gelatinous tube, from the right side. 



Figs. 27-35, Floscularia campanulata. 



Fig. 27. — Oblique ventral view of anterior trunk region, the nephridia not 

 shown. 



Fig. 28. — A'iew from the left side; in this figure as in the preceding the coro- 

 nal cilia are not shown. 



Fig. 29. — Germarium from a stained preparation, camera dra-wing. 



Fig. 30. — Germarium, oviduct and posterior portions of alimentary tract 

 and nephridia of an immature individual. 



Fig. 31. — Antero-ventral view of the corona. 



Fig. 32. — Somewhat oblique lateral view of the cerebral ganglion and its 

 nerves. 



Fig. 33. — A spermatozoon from body cavity of a female. 



Figs. 34, 35. — Oi^sophageal tube in two positions of movement. 



Pl.\te XXI. — AH the figures refer to Floscularia cam-panulata. 



Fig. 36. — A male from a tube of a female which contained 8 ova. This 

 mature male measured not more than the length of the dorsal coronal 

 lobe of the female. Viewed from the right side, the musculature and 

 cuticula not drawii, from life. 



Fig. 37. — An entire individual within its gelatinous tube. 



Fig. 38. — Foot of an immature female, only about one-quarter the adult 

 size, but attached. 



Fig. 39. — Mastax, dorsal view, muscles not drawn. 



Fig. 40. — Posterior end of foot and its peduncle of an adult individual. 



Fig. 41. — Nephridium of the right side of the body. 



