STRANDED AT LONGNIDDRY. 241 



pendulous from the ventral wall. The organ consisted of a distinct corpus 

 spongiosum urethree, and of a strong corpus cavernosum. These bodies 

 extended backwards for eight inches behind the crescentic folds above referred 

 to. The corpus cavernosum then subdivided at a very obtuse angle to form 

 the crura penis, which were firmly connected to the perichondrial investment 

 of the larger and more rounded end of the rudimentary and still cartilaginous 

 ossa innominata, which represented, therefore, the ischial elements of the 

 pelvis.* 



A strong muscle, which must be regarded as the erector penis, arose from 

 the ischium, close to the attachment of the crus, and passed forward to be 

 inserted into the corpus cavernosum. Large vessels and nerves were also seen 

 passing to the different subdivisions of the penis. From the posterior border 

 of each diverging crus, and from the sides of a tendinous raphe, which extended 

 backwards from the end of the corpus spongiosum, a broad and strong muscle 

 arose, which passed backwards along the side and under surface of the hinder 

 end of the rectum, and ended close to the anus. This muscle was apparently 

 the retractor penis. The corpus spongiosum had unfortunately been torn 

 across, where the crura diverged, and the rest of the urethra, the bladder, 

 testicles, &c, were not distinguishable, owing to the soft and injured state of 

 the parts. 



The arrangement of the parts at the entrance to the female passage has 

 been described on p. 201. The vagina was traced forwards for six feet from the 

 external orifice. Numerous irregularly arranged, and much subdivided, folds 

 of the mucous membrane projected from its surface into the canal. The uterus 

 was not recognised with any certainty, but a bag-like membranous organ, a 

 part of which was seen to project through a long cut in the wall of the 

 abdomen, on the day on which the baleen wreath of the foetus was found loose 

 in the abdominal cavity, was supposed to be a portion of that organ. 



The kidneys possessed the lobular construction so characteristic of the form 

 of those organs in the cetacea. 



I shall reserve for another communication the description of the skeleton and 

 joints, and such observations on the arrangement of the muscles as I was 

 able to record. I may, however, state that the vertebral formula, both in 

 the foetus and in the mother, was — Cervical, 7 ; Dorsal, 15 ; Lumbo-caudal, 41 ; 

 in all, 63. The outline of the cranial beak was in conformity with that of the 

 head, which is so well represented in fig. 10 from the foetus. 



The following are a few measurements of the skull, taken with a tape-line, 

 which may be of service in comparing it with the crania of other described 

 whales : — 



* I have described and figured the innominate bones and the sternum in the " Journal of Ana- 

 tomy and Physiology," May 1870. 



VOL. XXVI. PART I. 3 R 



