GINGLYMOSTOMA. 141 



Squalus tigrinus, L. Gin. i. p. 1493. no. 19. 

 — longicaudus, L. Gm. i. p. 1496. no. 24. 

 Russell, pi. 18 (young). 



Scyllium heptagonum, Riipp. N. W.Fische, pp. 61, 74, pi. 17. f. 1. 

 Stegostoma carinatum, Blyth, Journ. Asiat. Soc. Ben. 1847, p. 725, pi. 25. f. 1 & la. 



fasciatum, Mull. 1$ Henle, Plug. p. 24; Cant. Mai. Fish. p. 396; Dumeril, Hist, des Poiss. i. 



p. 337. 



There are three specimens in this collection: — one [132], measuring 10 inches, corre- 

 sponding to Russell's plate ; another [721] corresponding to Cantor's " older variety," 

 length 2 feet; and the third [513], of the same size as the second, which appears to be 

 an undescribed variety. 



It is identical in structure with the ordinary specimens ; but the coloration is very 

 different. Taking the light yellow of the under portions as the ground-colour, the 

 upper and lateral parts of the head and body are densely ornamented with undulating 

 brown stripes, darker on the edges than in the middle. On the tail these vermiculated 

 stripes assume the appearance of more or less regular transverse bands, from forty to 

 fifty in number, counting from the second dorsal. The sides of the belly are yellowish, 

 minutely dotted with brown ; the lower portions are immaculate. 



Aden. Zanzibar. Madagascar. Indian Ocean and Archipelago. 



GINGLYMOSTOMA, Midi. & Henle. 



484. Ginglymostoma brevicaudatum, sp. n. Plate XXI. [710.] 



Head very flat, depressed. Snout short, rounded, obtuse. Caudal comparatively 

 short, its length being contained four times and a half in the total. 



The nasal margin of the upper lip is provided in its middle with a very short cirrus. 

 The isthmus between the postlabial folds of the lower jaw is about as wide as each of 

 these folds. Eye very small. Spiracle minute, situated close behind the eye. The 

 angles of all the fins are rounded. The dorsal and anal fins are equal in size ; the 

 origin of the first dorsal is a little behind the middle of the base of the ventral ; 

 the interspace between the two dorsals is scarcely longer than the base of the 

 first; the second dorsal commences somewhat before the anal, and terminates a little 

 before the posterior end of that fin. Posterior margin of caudal excised ; its lower 

 lobe is obtusely rounded. Pectorals subquadrangular, with the posterior margin very 

 much rounded. Scales distinctly larger than in G. cirratum; those on the head are 

 smooth ; those on the back have from one to three keels, which become spinous on the 

 scales of the side. 



Upper parts dark brown, with minute black dots ; the lower surface brownish white. 



Total length 25 inches. Distance of vent from extremity of snout 12 inches. 



Zanzibar. 



