JOUENAL OF ENTOMOLOGY AND ZOOLOGY 157 



DESCRIPTION OF FIGURES 



Figure 1. A, central nervous system X50; 1, nerve to rhinophore; 3, 5, to gland 

 in buccal mass and muscles of mouth; 3, to mouth, tentacle, and sub- 

 pallial ridge; 4, to body wall; 6, to mouth muscles; 7, anterior; 8, 

 median; 9, posterior mantle nerve; 10, cerebro-buccal connective; 11, 

 to genital ganglion; 12, to body wall; 15, anterior; 16, first posterior; 

 17, second posterior pedal nerve; 18, from visceral ganglion to branchial 

 plexus; 19, to albumen gland and liver; iO, to mucus gland, intestine, 

 etc.; 21, to genital ganglion (proljably); 22, to brnnchia; 23, from pos- 

 terior mantle vein to branchial plexus; 24, brandies to papillae, (in all 

 other cases only the origin of the nerves to the papillae is 

 shown); 25, to alliunien gland. B, eye; C, cells from central ganglion 

 showing variation in size. D, section through central ganglia; 1, cere- 

 bral; 2, pleural; 3, pedal ganglion; E, the central ganglia; F, rhino- 

 phore in section. 



Figure 2. A, ovarian follicle; B, spermatic follicle; C, gland cells from light 

 portion of male accessory gland; D, cells from dark portion; E, cells 

 from albumen gland (female); F, active; G, dormant cells from 

 spermatotheca. 



Figure 3. A, cross section body wall; B, gland cells from foot; D, gland of papilla; 

 E, spicules; F, cross section of papilla. 



Figure 4. A, cross section buccal mass; B, point of junction of stomach and liver 

 epithelium; D, cross section salivary gland; E, tip of branchia; F, 

 nephridial valve. 



Figure 5. Reproductive system. Hermaphroditic portion striped, female dotted, 

 male plain. 



