1908. J OF THE FAMILY ORECTOLOBID^. 363 



vertical from the eyes than to the end of snont ; fold of lower 

 lip continuous ; nasal cirrus extending to the edge of nasal valve. 

 Anterior edge of spiracle vertically below the posterior edge of 

 eye. First dorsal originating above the posterior end of base 

 of pelvics ; free edge of the fin straight or convex ; length of 

 base I to |- the distance from second dorsal. Origin of anal at a 

 distance from the vertical from end of base of second dorsal 

 considerably greater than the length of the latter ; length of base 

 of anal equal to or a little greater than that of the lower caudal 

 lobe in front of the notch. Pectoral extending about | of the 

 distance from its origin to that of the pelvics. Head and body 

 with dark reddish spots or vermiculations, some of which may 

 unite to form pairs of transverse stripes. 

 From the Cape of Good Hoj)e to China. 



Stegostoma, Miill. & Henle, Arch. f. Naturgesch. 1837, i. 

 p. 395, and Plagiost. p. 24 (1841); Gunth. Cat. Fish, viii 

 p. 409 (1870). 



Head obtuse ; body elongate, compressed posteriorly. Mouth 

 transverse ; teeth small, tricuspid, in many series, occujjying in 

 each jaw a flat, four-sided area ; lower lip not divided by a 

 symphysial groove. Nasal valves separate, each with a cirrus. 

 Eye small ; no longitudinal fold below the eye. Spiracles mode- 

 rately large, nearly vertical, behind the eyes. Gill-openings of 

 moderate width, last three above the base of the pectoral ; last 

 two very close together. First dorsal partly above and partly 

 in advance of the pelvics, somewhat larger than the second 

 which is partly above and partly in advance of the anal, which 

 terminates immediately in front of the caudal. Caudal very 

 long ; axis not directed upwards ; lower lobe notched posteriorly. 

 Pectorals broad, with straight or notched edges and rounded 

 angles. 



A single species from the Indo- Pacific. 



Stegostoma tigrinum. 



Squalus tigrinus Gmelin, Linn. Syst. Nat. p. 1493 (1788)- 

 Forst. Zool. Ind. p, 24, pi. xiii, fig. 2 (1795). 

 Squahts longiccmdus Gmelin, t. c. p. 1496. 



* I am unable to understand Dr. Giinther's statement that tlie anal fin is cut 

 away in this specimen. It is true the species was described by Gronow as lackino- 

 an anal tin, but this was because he made the very natural mistake of regarding the 

 ana-l fin as part of the caudal, as is evident from his description : — " Lobis qui subtus 

 caudam occicpant bini lineares, longi, ceqiiales, convexi." 



