JOURNAL OF MICROSCOPICAL SCIENCE. 



EXPLANATION OF PLATE XXII, 



Illustrating Rev. T. Hincks's Abstract of Prof. Vogt's Paper 

 on Loxosoma. 



Letters employed in the Plate to designate the various portions of the 



Structure. 



Adult Animal. Adult Animal. 



A. The hood. a. Cuticle. 



B. Body. b. Hypodermic layer. 



B'. Bud. c. Palmiform cutaneous folds. 



C. Vestibule. d. Tactile organ. 



D. Tentacular crown. e. Sphincter of the hood. 



E. Digestive canal. g. Ciliary cells of the tentacle, 

 i F. Stem. i. Moutli. 



G. Intestine proper. k. Anterior lip. 



H. Rectum. I. Posterior lip. 



J. Orifice of the hood. m. (Esophagus. 



n. Stomach. 

 Embryo. o. Hepatic cells. 



M. Ciliary crown. ''■ ^«^! ^Vfi^^: , 



N. Rudimentary digestive canal. '■ J^"^!"f ^ ^^^i^^^- 



0. Buccal mammilla. ^- if ♦'^^''^ 



ii. Spectacle-organ. «. Mass of zoosperms. 



S Eve-specks '■'• Rudiments ot the generative 



T. Caudal appendage. organs. 



"^ ° w. Ova. 



Bud. ^- Ovisac. 



y. Tentacular cilia. 



V. Masses of cells. 2. Crenated edge of the aperture of 



W. Primitive fissure. |,jie hood. 



X. Pedal body. /_ Q,q\\& surrounding the exterior 



Y. Pedal gland. margin of the sphincter. 

 Z. Pedal groove. 



Fig. 1. — Adult female Loxosoma, viewed in profile. 

 EiG. 2. — Male, contracted, ventral surface, with two uneqally developed 

 buds. 



Fig. 3. — Male, dorsal surface. Testicles and seminal vesicle fully de- 

 veloped. 



Fig. 4. — Male, ventral surface ; mass of zoosperms escaping. 



Fig. 5. — A young Loxosoma that has been fed with carmine, showing the 

 course of the food through the digestive canal and the cavity of the hood. . 



Fig. 6. — Female viewed from behind, containing 10 ova in various stages 

 of development, numbered 1 to 10. 



Fig. 7. — A group of three ova united by the pedicles of the ovisacs. In 

 the one on the left segmentation is complete (mulberry stage) ; that on the 

 right is more advanced, and appears as a granulated mass; the one in the 

 middle contains an embryo in course of development. 



Fig. 8. — Embryo after liberation. 



Fig. 9. — A '^oxmg Loxosoma, developed from a bud, showing the rudimen- 

 tary tentacles; the oesophageal funnel, with its large posterior lip; the 

 stomach, as yet uncoloured by the hepatic cells ; the mammilla of the pedal 

 body, and the groove in the stem occupied by the pedal gland. 



Fig. 10. — Tentacle, viewed in profile, showing the structure. 



Fig. 11. — The tactile organ. 



Fig. 12. — A bud, showing the rudimentary digestive canal destitute of 

 internal cavity. 



