64 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 92 



and serving to give rigidity to the median tooth. (Figs. 25 A, B, 

 26, 27.) 



VII. Pyloric ossicles. One pair. — These strongly convex, triangu- 

 lar structures lie between the exopyloric ossicles, with which they 

 articulate on either side, and extend behind the propyloric ossicle, 

 entirely on the surface of the stomach. They give attachment to the 

 inner posterior gastric muscles. There is a ligamentous connection 



VI IV VII 



-r— CpV 



/ 1 I / 



XI X VI 11 Amp 



Fig. 27. — Internal view of stomach cut slightly to one side of the median line to 

 show relative positions of the " teeth." 



/, mesocardiac ossicle ; //, pterocardiac ossicle ; ///, zygocardiac ossicle ; IV, 

 exopyloric ossicle; V, urocardiac ossicle; I'l, propyloric ossicle; VII, pyloric 

 ossicle; VIII, pectineal ossicle; IX, prepectineal ossicle; X, postpectineal 

 ossicle; XI, inferolateral cardiac ossicle. 



Amp, ampulla; CdAI, anterolateral cardiac plate; CdPl, posterolateral cardiac 

 plate; CpV, cardiopyloric valve; Oc, esophagus. 



between them, but they do not appear to be fused into one structure, 

 as in the case in the European Cancer pagiirus. (Figs. 25, A. B, 26, 27.) 



CARDIAC SUPPORTING OSSICLES 



VIII. Pectineal ossicles. One pair. — These ossicles lie in the lateral 

 wall of the stomach between the lower posterior end of the prepectineal 

 and the upper posterior end of the postpectineal ossicles. Externally, 

 they appear as relatively small, semicircular structures, but internally, 

 they are seen to bear a distinct brushlike cluster of six or seven long 



