1901.] 



ANATOMY OF COGIA BREVICEPS. 



129 



those in the Greenland Eight Whale as described by Prof. 

 Struthers [12], we shall find an interesting series of stages in 

 their arrangement. 



Tor this purpose I reproduce the figures given by these authors 

 (see text -figs. 7 and 8). 



In the Grampus (text-fig. 7, p. 128) there are two pairs of 

 distinct muscles ; also a pair of accelerators (A), which only differ 

 from those in Cogia by their smaller size, for in the Small Cachalot 

 they extend much beyond the " erect ores " and are, relatively, much 

 more conspicuous. No doubt this is in relation to the much 

 greater development of the posterior end of the corpus spongiosum 

 and its bifurcation. 



Text-fie. 8. 



pel 



Muscles of Praia of Greenland Right Whale, seen from below (copied from 



Struthers )■ 

 S. irorseshoe-sliMpril -i-ptum; other letters as in text-fig. 7, p. 128. 

 Compare text-figs. 7 & ft with the figure of these muscles in Cogia (PI. XI. fig. 23). 

 Peoc. Zoul. Soc.— 1901, Vol. II. No. IX. 9 



