1908.] OF THE FAMILY ORECTOLOBID.E. 355 



terminal ; teeth slender, pointed, the median ones enlarged and 

 unicuspid, the lateral teeth smaller, with small accessory cusps ; 

 lower lip divided by a s^anphysial groove. JSTasal valves separate, 

 each with a cirrus. Eye small ; a more or less distinct longi- 

 tudinal fold below the eyes. Spiracles large, oblique, extending 

 forward to below the eyes. Gill-openings of moderate width, the 

 last a little wider than the rest ; last three or four above the base 

 of pectoral ; last two closer together than the others. Dorsal fins 

 subequal, the first above or behind the pelvics, the second in 

 advance of the anal, which terminates directly in front of the 

 lower caudal lobe or is continuous at the base with the latter. 

 Caudal of moderate length ; axis not directed upwards ; lower 

 lobe notched posteriorly. Pectorals broad, with straight or 

 convex edges and rounded angles. 



Synopsis of the Species. 



I. Nasal cirnis with a short branch at about the midtlle of 

 its length. 



A. Branch of nasal cirrus bifid ; on each side 3 to 5 



dermal lobes above the upper lip, followed by 4 or 5 

 near the angle of the mouth and these by 2 (each 

 notched distally) at the side of the head 1. harhatus. 



B. Branch of nasal cirrus simple. 



On each side 2 or 3 dermal lobes above the upper 

 lip, followed by 3 or 4 (the first and last of 

 which are bifid) near the angle of the mouth 

 and these by 2 (each notched distally) at the 

 side of the head 2. Japonicus. 



Dermal lobes all simple ; on each side 2 above the 

 upper lip, 2 near the angle of the mouth, and 2 

 at the side of the head 3. ornatus. 



II. Nasal cirrus simple; dermal lobes simple; on each side 

 one above the upper lip, another near the angle of the 

 mouth, and a third at the side of the head 4. tentaculatus. 



1. Oreotolobus BARBATUS. 



Sqimlus harhatus Gmelin, Linn. Syst. Nat. p. 1493 (1788); 

 Schneid. Bloch^s Syst. Ichth. p. 128 (1801). 



Squalus lohatus Schneid. t. c. p. 137. 



Squalus appendiculatus Shaw, Nat. Misc. pi. dccxxvii. 



Crossorhinus harhatus (part.) Dumeril, Elasmobr. p. 338 (1865) ; 

 Giinth. Cat. Fish. viii. p. 414 (1870). 



Crossorhinus harhatus McCoy, Prodr. Zool. Vict. v. 1880, 

 pi. xliii. fig. 1 ; Macleay, Proc. Linn. Soc. N. S. Wales, vi. 

 1881, p. 365. 



A papilliform projection above the posterior part of each eye 

 (and in the adult another above the anterior part). Nasal cirrus 

 long, with a short bifid branch at about the middle of its length. 

 On each side a series of 3 to 5 simple tentacle-like dermal lobes 

 above the upper lip, followed by 4 or 5 near the angle of the 

 mouth, the first and last of which are ramose and by 2, short, 

 broad, and distally notched, at the side of the head. First dorsal 



