456 THE PLAGIOSTOMIA. 



Addenda. 

 Rhincodon typus. Page 42. 



A large specimen of this species was taken near Knights Key, Florida, 

 June 1st, 1912. Its length was given by its captor as 45 feet, its circumference 

 as 23 feet 9 inches, diameter 8 feet 3 inches, width of mouth 38 inches, depth of 

 caudal fin 10 feet, length of dorsal fin 3 feet, height of dorsal fin 2 feet 9 inches. 

 It was said to weigh 30,000 pounds. 



The range of this species extends throughout the Indian Ocean and the 

 temperate and the tropical portions of the Pacific and the Atlantic. 



Page 167. Triakis venusta. 



Calliscyllium venustum Tanaka, 1912, Fishes of Japan, 10, p. 171, pi. 46. 



Slender, elongate, tapering. Body short; tail about five ninths of the total; 

 caudal axis hardly raised. Head depressed, rather narrow and pointed. Snout 

 short, blunted; nostrils nearer to mouth than to end, anterior valves separated 

 on the internarial space by about one third of its width, their inner ends near the 

 mouth cleft. Mouth wide, sharply curved at the symphysis, with a short labial 

 fold around each angle. Teeth small, in longitudinal rows and in transverse 

 series, serrate on the hinder (free) edge with about five short cusps, median 

 largest but not quite as much so as on teeth of T. scyllium. Eye longer than wide, 

 lateral, with a nictitating fold. Spiracle small, behind and near the eye. Gill 

 openings small, hindmost two above the pectoral. Scales small, with a median 

 keel, like those of other species of the genus. Dorsal fins nearly equal, hind 

 angles produced; origin of first dorsal about midway from the bases of the 

 pectorals to the ventrals, end of fin hardly reaching to a vertical from the latter. 

 Pectorals little larger than dorsals, base about equal hind margin, inner angle 

 blunt. Ventrals and anal smaller than the dorsals; ventral origins little be- 

 hind the tip of the first dorsal ; anal origin little in front of that of the second 

 dorsal, tip of fin less produced, reaching nearly as far back as the base of this 

 dorsal. Caudals rather small; subcaudal not deep, gradually narrowing back- 

 ward, separated from the terminal by a notch. Terminal widening backward, 

 obliquely truncated. 



Light brownish with numerous (a dozen or more) faint transverse bands or 

 blotches. of darker separated by narrower spaces on the upper half of the body; 



