Dr. J. E. Gray on a new genus of Lophohranchiate Fishes. 309 



of the two animals are compared. The head of Cephalotes is much 

 shorter and broader. The cutting teeth are exceedingly different : 

 in Cephalotes the cutting teeth are close together, the upper ones 

 chisel-shaped, the lower ones rather conical, entirely fiUing up the 

 very narrow space between the base of the large canines ; while in 

 Notopteris they are only two, far apart, small and isolated. 



The wings of the two genera arise from the centre of the back ; 

 and the bases of the wings, which cover the back, are naked. But 

 in Cephalotes the nakedness extends over the shoulders to a line 

 even with the front edge of the wings ; in Notopteris the naked 

 part only occupies the hinder half of the back or loins, the shoulders 

 being exposed and covered with hair like the rest of the body. 



The tail in Cephalotes is short and rudimentary, flattened, and 

 formed of four or five very short joints, and not elongated and in- 

 curved as in the new genus. 



I may observe that, though the index-finger of the Cephalotes 

 Peronii from Celebes (in the British Museum, received from the 

 Leyden Collection) is not provided with any distinct, well-developed 

 claw, the end of the bone is curved upwards and rather produced 

 into a resemblance of a claw, — there being no indication of such an 

 appendage in the animal from Viti. 



Pteropus amplexicaudatiiSj from Timor, has a rather elongated 

 head, a short free tail; and the wings arise from the sides of the back, 

 with a broad hairy space between their bases ; but this differs from 

 Cephalotes in having a small distinct claw on the end of the index- 

 finger, and in having four chisel-shaped cutting teeth in the lower 

 jaw, occupying the whole of the rather wide space between the base 

 of the large canines ; and it has four rather conical cutting teeth in 

 the upper jaw. 



Notopteris Macdonaldii. 



Pale-reddish brown above, rather grayer beneath ; the hinder 

 half of the back, which is covered by the bases of the wings, bald, 

 with a very narrow line of short hair down the vertebral line. The 

 rump and upper surface of the base of the interfemoral membrane 

 covered with hair. 



iZ^« 6. The Island of Viti Leon, Feejees. September 1857. Male 

 and female. Iris dark hazel. (John 1). Macdonald.) 



Male. Length of head and body 4^, tail 2, fore-arm bone 2^, leg 

 bone l^ inch. 



Female rather smaller : arm-bone 2-i- inches. 



Notice of a New Genus of Lophobranchiate Fishes from 

 Western Australia. By Dr. J. E. Gray, F.R.S., etc. 



Among the collections made by the Medical Officers of H.M.S. 

 ' Herald,' above referred to, is a curious and apparently new species 

 of SyngnathidcB, of which I give a brief description. 



Haliichthys. 

 Mouth elongate, quadrangular, with a spine on the middle of each 



