Figure 1. 
Figure 2. 
Figure 3. 
Figure 4. 
Figure 5. 
JOURNAL OF ENTOMOLOGY AND ZOOLOGY 157 
DESCRIPTION OF FIGURES 
A, central nervous system X50; 1, nerve to rhinophore; 2, 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; 20, to mucus gland, intestine, 
etc.; 21, to genital ganglion (probably) ; 22, to branchia; 23, from pos- 
terior mantle vein to branchial plexus; 24, branches to papille. (in all 
other cases only the origin of the nerves to the papille is 
shown) ; 25, to albumen 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. 
A, ovarian follicle; B, spermatic follicle; C, gland cells from light 
portion of male accessory gland; D, cells from dark portion; HK, cells 
from albumen gland (female); F, active; G, dormant cells from 
spermatotheca. 
A, cross section body wall; B, gland cells from foot; D, gland of papilla; 
E, spicules; F, cross section of papilla. 
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. 
Reproductive system. Hermaphroditic portion striped, female dotted, 
male plain. 
