56 On the Sharks of the Family Squalidae. 



1. Euprotomicrus bispinatus. 



Scymnus bispinatus, Quoy & Gaini. Voy. ' Uranie,' Zool. p. 197, pi. xli v. 

 figs. 1 & 2 (1824). 



Scymnus (L&margus) labordii, Mull. & Henle, Plagiost. p. 94 (1841). 



Lcemaryus labordii, Dumeiil, Elasmobr. p. 457 i ] - 



Euprotomicrus labordii, Giinth. Cat. Fish. viii. p. 428 (1870) ; Cunning- 

 ham, Proc. Zool. Soc. 1899, p. 732. 



Euprotomicrus hyalinus, Eigenm. Proc. Cal. Ac. (2) iii. 1890, p. 35. 



Hab. Lido-Pacific. 



In the British Museum three specimens, 200 to 220 mm. in 

 total length. 



13. Pristiophorus. 



Pristiophorus, Miill. & Henle, Plagiost. p. 97 (1841). 



The form of the rostrum and the arrangement of the rostral 

 teeth change considerably during growth. Jn the young the 

 snout is relatively much shorter and broader than in the adult 

 and is armed with movable teeth ; those of the lateral series 

 are of equal size and correspond to the principal teeth of the 

 adult, the smaller intermediate teeth not having been deve- 

 loped. The barbels are proportionately longer and are 

 inserted more posteriorly in young specimens. 



Three species. 



Synopsis of the Species. 



I. Barbel a little nearer to tip of snout than to nostril (in the adult), 



or a little nearer the nostril (in the young) 1. arreting. 



II. Barbel much nearer to nostril than to tip of snout. 



Breadth of snout at its base 3h in its length (in a speci- 

 men of 1000 mm.) ; barbel, when laid back, reaching 

 nostril (adult) or mouth (young) 2. nudipinnut. 



Breadth of snout 3| in its length (in a specimen of 

 700 mm.) ; barbel, when laid back, not reaching 

 nostril 3. japonicus, 



1. Pristiophorus cirratus. 



Pristis serrattts, Latham, Trans. Linn. Soc. ii. 1794, p. 281, pi. xxvi. 

 Pristiophorus serratus, Miill. & Heule, Plagiost. p. 98 (1841); Du- 



menl, Elasmobr. p. 461 (1865) ; Giinth. Cat. Fish. viii. p. 432 (1870) ; 



Jaekel, Arch. f. Xat. 1891, p. 45. 



Hab. New South Wales, Victoria, and Tasmania. 

 In the British Museum six specimens, 300 to 1200 mm. in 

 total length. 



