86 DR. R. E. GRANT ON THE ANATOMY OF SEPIOLA VULGARIS. 
tween the third and fourth arms on each side; 0b. b. spotless white band around the 
orifice of the sac; c. c. villous surface of the expanded termination of the tentacula. 
Fig. 5. Back view of the trunk with the skin removed. a. soft transparent dorsal 
lamina ; b. b. cartilaginous scapule of the dorsal fins, with muscular fasciculi passing on 
to them from the surface of the mantle; c.c. extensor muscles of the dorsal fins ; 
d. longitudinal muscular fasciculi of the exterior of the mantle. 
Fig. 6. a. alternate double series of pedunculated suckers of the arms of Sepiola vul- 
garis ; b. one of these suckers with its muscular peduncle magnified ; c. crowded irre- 
gular arrangement of the pedunculated suckers of Sep. stenodactyla. 
Fig. 7. Front view of the digestive organs of Sepiola vulgaris. «a. @sophagus ; b. giz- 
zard marked by longitudinal muscular bands ; ¢. spiral stomach ; d. d. intestine drawn 
towards the left side; e. the anus, with its two minute tentacular folds; f. f. the two 
lobes of the liver; g. the two hepatic ducts surrounded by the pancreatic glands in 
their course to the spiral stomach ; A. h. trilobate form of the ink gland; k. duct of the 
ink gland terminating in the rectum. 
Fig. 8. Back view of the digestive organs of Sepiola vulgaris. a. a. course of the 
esophagus along the middle of the back ; b. gizzard; c. spiral stomach; d. entrance of 
the hepato-pancreatic duct into the spiral stomach ; e. intestine passing up on the an- 
terior surface of the liver; f. f. the two lobes of the liver united at their upper part ; 
g. g. the inferior pair of salivary glands; h. h. their ducts passing up behind the 
esophagus. 
Fig. 9. Circulating and respiratory organs of Sep. vulgaris. a. vena cava; b. b, vesi- 
cular bodies on the two branchial arteries; c.c. two branchial hearts or portions of 
the auricle; d. d. fleshy appendices of the branchial hearts ; e. e. branchial arteries ; 
f. f. branchie ; g. g. branchial veins ; h. h. enlargements of the branchial veins at their 
entrance into the systemic heart; 7. the systemic heart or ventricle ; k. the dorsal or 
ascending aorta; 1. the ventral or descending aorta ; m. branches to the organs of ge- 
neration from the trunk of the ventral aorta. 
Fig. 10. Female organs of generation of Sep. vulgaris seen from before. The mantle 
and the syphon are here cut open. a. valvular fold in the interior and back part of the 
syphon ; b. 6. articular cartilages connecting the base of the syphon to the parietes of the 
sac; ¢. ovarium filled with ova, and occupying the base of the sac ; d. d. two large glands 
of the oviducts ; e. e. terminations of the two oviducts. 
Fig. 11. Male organs of generation seen from before. a. testis; b. vas deferens ; 
c. epididymis ; d. penis. 
Fig. 12. Structure of the ova as seen through the microscope. 
Fig. 13. Portion of the hepatic ducts laid open to show the oblique orifices of the 
ducts of the pancreatic glands. a. a. hepatic ducts laid open; 0. b. pancreatic glands ; 
c. c. their openings into the hepatic ducts. 
