1901.] AXATOMT. OF COGIA BEEYKEPS. 123 



Xo doubt this matter is dealt with by the French authors ; but 

 in view of the condition of the " stomach " in other Cetacea, that 

 of the Cachalot is rather puzzling. 



It appears, then, that in the family Physeteridce the apparatus is 

 simpler than in the DelphinidaB, and agrees with the Platanistida? iu 

 having only three chambers, viz., a paunch, a cardiac chamber, and 

 a pyloric chamber. 



V. Tlie Penis. 



The body-wall between the anus and the aperture of the penial 

 sheath had been cut about, so that the position of these apertures 

 and their distance apart, with regard to the body-length, could not 

 be ascertained. 



In the arrangement of the muscles at the base of the organ, and 

 some other matters, Cor/ia differs from the accounts given for the 

 Dolphin and the Eight Whale (by Professors Turner and Srruthers 

 respectively), so that it is worth while to put on record the arrange- 

 ments in the present whale. The total length of the apparatus, in 

 the fresh condition, was 28 inches, measured from the base of the 

 " accelerator urines " muscles to the end of the penial sheath, but 

 more detailed measurements of the preserved material show that 

 a certain amount of shrinkage had occurrred. 



In dealing with the penis, it will be convenient to distinguish 

 three regions : — 



(1) A basal portion consisting of the crura penis, surrounded by 



the muscles, which in Cor/ia ai-e 4 in number, a pah- of 

 medial acceleratores urince and a pair of lateral erectores penis. 

 This region measures, in the preserved specimen, 7 inches in 

 length and about 5 inches at the broadest. 



(2) The middle region or " body of the penis," rather more than 



6 inches in length, formed almost wholly by the single 



corpus cavemoswm. 



And (3) the distal region of 12 inches, extending from the 



insertion of the sheath or prepuce into the penis, up to the 



external pore. The terminal region of the penis, enclosed 



within the sheath, is 8| inches in length: this region may 



be termed the ' ylans,' though it contains a continuation of 



the corpus cavernosum. 



We will consider the middle region or body of the penis first. 



It consists of a Bingle corpus cavernosum, having tin- usual struc- 



ure, with a thick tunic of librous tissue, and enveloped in a looser 



connective tissue carrying blood-vessels and nerves (PL X.lig. 10). 



The body is not quite cylindrical, but is slightly higher than broad 



achby 1 J inch, in the measured specimen) ; it was not straight, 



but Bomewhat undulating '. 



The upper surface is convex. There is no dorsal furrow, such 

 a- is described for Balanqptera, and the plexus uf blood-vessels 



Tin- only figun- el ir.ni.-vci'Hc section! of a Cetacean pcni- ihal I have M'cii 

 is that ■_ . i uric (4) for Balanoptera, where il u broader than high. 



