(J. ziPHius. 353 



curved line, with the concavity in front. Tail with two falcate lobes, 

 flat, without any central prominence. Female sexual organs under 

 middle of dorsal. Skull triangular. Forehead very high in front, 

 and swollen behind. Intermaxillaries curved in front. Nose very 

 long, compressed at the hinder end, very narrow, slightly keeled on 

 each side. Hinder wing of the maxilla expanded horizontally over 

 the orbits. Nasal bones encased in the frontals and intermaxillaries. 

 Temporal pit very small. Palate smooth. Lower jawbones elongate, 

 tapering, slender, nearly straight. The ear-bone is attached by an 

 apophysis to the base of the skull. " Vertebrae 38, viz. 6 cervical 

 separate, 10 costal, 11 lumbar, 11 true caudal. Metacarpal bones 

 cartilaginous.'' — Dumortier, Mem. Acad. Brux. xiii. t. 10. 



M. Dumortier found, near the middle of each side of the lower 

 jaw, an alveolus, as if for a tooth. His figure represents the pec- 

 toral as situated at two-ninths of the total length, and the dorsal at 

 five-ninths, from the end of the nose. The following are the mea- 

 surements of the two females that have been described : — 



Blainv. $ Dum. 5 



ft. in. metres. 



Length, entire 15 3-45 



Length of head 2 7 (nose) 0-33 



Length to blowers 2 3 0*44 



Length to pectoral 3 4 0-91 



Length of pectoral 1 6 0-30 



Length to dorsal 9 1 2-04 



Length of dorsal 10 0-27 



Length to eye 0-49 



Length to the vulva . . 2-21 



Circumference 7 6 2-00 



Width of pectoral 6 0-12 



Width of caudal 3 0-68 



Height of dorsal Oil 0-27 



Breadth of blower 0-10 



The only male hitherto observed was thrown ashore on the coast 

 of Elginshire in 1800. It was 16 feet long and 11 feet in circum- 

 ference. A female was caught at Calvados in 1826 ; its skull and 

 vertebral column is in the Museum at Caen. Another was taken at 

 the mouth of the Seine in Sejitember 1825 ; the skull, which was 

 described by De Blainville, is in the Paris Museum. The skeleton 

 of the one taken at Ostend on the 21st of August, 1835, 11 feet long, 

 is in the collection of M. Paret, near that city. 



* * Teeth (of male) very long, 2Ji'odi/cecl, arched, and truncated, with a 

 conical process in front. Dolichodon. 



2. Ziphu^^ayardii. 

 Ziphius Layardii, Gray, P. i^^^oGo, 358. 

 The entire length of the skuII, from condyle to top of rostrum, 

 3 feet 7 inches ; of the rostrum, from tip to notch, 2 feet 6 inches ; 



