448 THE ANATOMY OF INVERTEBUATED ANIMALS. 



with the pallial cavity either directly or through these cham- 

 bers. Thus, in Sepia officinalis, Krohn ^ observed that the 





m 



Fig. l^i^.— Sepia officinalis.— I. The alimentary canal, with the ink-bag: mb, buccal 

 mass; gb, inferior buccal ganglion ; s', pot*terior salivary glands ; oe, CBSophagus; 

 h, liver; dh, hepatic duct ; «?, stomach ; v\ pyloric cjecum ; i, intestine ; a, anus; 

 bi, ink-bag ; gsp, splanchnic ganirlion on the stomach. (After Keferstein.) 



n. Longitudinal and vertical section through the buccal mass : mxi, posterior beak ; 

 mxs, anterior beak ; 7/ibc, buccal membrane ; ml, lip ; a:, gustatory (?) organ ; rd, 

 radula ; z, sac of the radula ; s', salivary gland ; gl, superior buccal" ganglia. (After 

 Keferstein.) 



III. A single transverse row of teeth from the radula. (After Troschel.) 



renal chambers communicate not only with the cavities in 

 which the branchial hearts are lodged, but with a chamber 

 which contains the stomach and the spiral pyloric appendages ; 

 and that all these cavities are distended when air is blown 

 into one renal chamber. In JEledone, on the contrar37-, he 

 found, and I have repeated the observation, that one renal 



* " Ueber das wasserfiihrende System einiger Cephalopoden." (" ArcMv 

 fiir Anatomie," 1839.) 



