1888.] 



BROOD-POUCH OF RHINODERMA DARWINI. 



233 



That author says, in describing its attachments (Spengel's trans- 

 lation, p. 499), "Sie fand sich stellenweise anliesead, stellenweise 

 vollstandig verwachsen mit der Innenfliiche der Haut und mit der 

 Aussenfliiche der Brust- und Bauchmuskeln." In my specimen no 

 such confluence with the abdominal muscles was discernible ; such 

 attachments, however, as were instituted were of a very definite order. 

 Espada states that the sac bears at the shoulders 'Zipfeln'; and 

 this might appear to imply that it is an irregular structure, bearing 

 lateral diverticula and accommodating itself, as it were, to its sur- 

 roundings. The only fusion with the inner surface of the integu- 



The same as in fig. 1, the ventral integument having been wholly reflected, and 

 the gular sac opened up to display its contents. 



ment observable in my specimen is a bilaterally symmetrical one 

 (figs. 1 & 2) set up near the angle of the lower jaw. The wall of the 

 sac, elsewhere very thin and transparent, is at these points thickened, 

 and, consequent upon its adherence to the integument, dragged out 

 as it were laterally, to form two prolongations which answer very 



