1876.] MR. J. W. CLARK ON DELPHINUS ALBIROSTRIS. 689 



iiito 7 cervical, 14 dorsal, 24 lumbar, and 45 or 46 caudal. These 

 latter are difficult to count accurately, as the last of the series are 

 mere specks of cartilage. 



The first two cervical vertebrae are ankvlosed ; the remaining five 

 are free. These have each asuperior and an inferior transverse process, 

 with the exception of the seventh, in which the inferior process is 

 absent. These processes are directed forwards and overlap each 

 other. Those of the fifth vertebra are the least developed. The 

 superior process of the seventh is extremely large, and overlaps those 

 of the fourth, fifth, and sixth completely. 



There are fourteen pairs of ribs. The first six have long necks, 

 reaching in each case to the articular surface on the side of the 

 vertebra in front of that to which the tubercle is attached. At the 

 seventh the necks cease suddenly, and it and the remaining ribs are 

 attached by their tubercles only to the transverse processes of the 

 vertebrae. This attachment becomes less and less close till the 

 fourteenth rib is reached, which is attached by ligament nearly 

 an inch in length to the transverse processes of the fourteenth and 

 fifteenth thoracic vertebrse. 



There are nine pairs of sternal ribs. The first pair articulate to a 

 facet upon the centre of the wings into which the sides of the first 

 segment of the sternum is expanded ; the second at the junction of 

 the first and second segments of that bone ; the third at the junction 

 of the second and third segments ; and the fourth, fifth, and sixth 

 to the hinder end of the third segment. 



The spines of all the thoracic vertebrae are well developed and 

 inclined backwards. This inclination gradually diminishes. The 

 tenth vertebra has an absolutely vertical spine, as have all the 

 lumbar vertebrse. In this portion of the column they are of great 

 height, with well-developed metapophvses. The spines reach their 

 greatest height at about the thirty second vertebra (counting from 

 the first cervical), and cease at the seventy-fourth. 



The characters of the skull could not be ascertained, as it has not 

 yet been sufficiently macerated. It measured 14| inches from the 

 occipital condyles to the tip of the beak, which was 3 inches wide at 

 the termination of the dental series. Length of dental series in a 



straight line 5| inches. Dental formula ~j$_~j 3 . Unfortunately the 

 lower jaw was carelessly macerated, and some of the teeth had fallen 

 out, so that it was impossible to count them accurately ; but probably 

 twenty-six might be set down as the number on both sides of the 

 lower jaw. The teeth are all conical, recurved, sharp ; those at the 

 tip had not yet passed the gum. 



Viscera. — The tongue measured 6 inches in length bv 2 in width. 

 The tip was a sharply pointed triangle, on each side of which for a 

 distance of nearly 2 inches it was deeply fimbriated. Some of these 

 fimbriations were a quarter of an inch in length. Near the base 

 were the orifices of numerous glands and several black spots. 



The stomach (Plate LXV.) differs somewhat both from that of 

 the Porpoise (Phocccna vulgaris) and that of the Pilot Whale 

 (Globiceplialus mrlas) described and figured by Prof. Turner*. 

 * Journal of Anatomy, vol. ii. p. 72. 



