448 



THE ANATOMY OF INVERTEBRATED ANIMALS. 



with the pallial cavity either directly or through these cham- 

 bers. Thus, in Sepia officinalis, Krohn 1 observed that the 



Fig. 126. — Sepia officinalis.— I. The alimentary canal, with the ink-bag: mb, buccal 

 mass ; gb, inferior buccal ganglion ; s', posterior salivary glands ; oe, oesophagus; 

 A, liver ; dh, hepatic duct ; v, stomach ; v', pyloric caecum ; i, intestine ; a, anus; 

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



II. Longitudinal and vertical section through the buccal mass: meet, posterior beak ; 

 mxs, anterior beak : mbc, buccal membrane ; ml. lip ; x, gustatory (?) organ ; rd, 

 radula ; z, sac of the radula ; «', 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 Eledone, on the contrary, he 

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



1 " Ueber das wasserfuhrende System einiger Cephalopoden." (" Archiv 

 fur Anatomic," 1839.) 



