HEMIGALEUS MACROSTOMA. 161 



Total length 25?, snout to hindmost gill opening 5i, snout to abdominal 

 pores 121, caudal fin 5l, snout to base of dorsal 7 inches. 



Specimen received from the '^A.quarial Gardens," the collections for which 

 were made off the coasts of Massachusetts and Rhode Island. 



Hemigaleus microstoma. 



Hemigaleus microstoma Bleeker, 1852, Verh. Bat. gen. 24, Plagios., p. 46, pi. 2, f. 9; Dumeril, 1865, 

 Elasm., p. 392; Gunth., 1870, Cat., fishes Brit, mus., 8, p. 375. 



Head rather short, broader than high. Snout pointed, length greater than 

 the width of the mouth. Nostrils little nearer to the end of the snout than to 

 the angles of the mouth, midway in the preoral length, valves with an angular 

 lobe. Mouth much wider than long; labial folds short, on both jaws, around 

 the angle. Diameter of the eye three sevenths to three fifths of the preoral 

 length of the snout. Upper teeth in 32 rows, triangular, oblique, outer margin 

 serrated, inner margin convex, smooth; lower teeth smaller, broad-based, cusps 

 narrow, slender, not serrated. Spiracle pore-like, behind the orbit. Width of 

 gill openings greater than the diameter of the orbit. Pectorals nearly twice as 

 long as broad, falciform, pointed, when applied to the side subtending half of the 

 base of the dorsal. Dorsal near the middle of the space between pectorals and 

 ventrals, about as high as long, with sharp angles. Second dorsal more than 

 half the size of the first, origin slightly in advance of that of the anal. Anal 

 smaller than second dorsal. Caudal pointed, about one fourth of the total 

 length, equal to the distance between the dorsals. 



Reddish grey, yellowish below, fins grey, apex of second dorsal white. 



Java. 



Hemigaleus macrostoma. 



Hemigaleus macrostoma Bleeker, 1852, Verh. Bat. gen. 24, Plagios., p. 46, pi. 2, f. 10; Dumeril, 



1865, Elasm., 392; Gxjnth., 1870, Cat. fishes Brit, mus., 8, p. 376. 

 Chaenogaleus macrostoma Gill, 1861, Ann. N. Y. lye, 7, p. 411 (name only). 



Head two thirteenths of the total length, broader than high. Snout pointed, 

 length little greater than the width of the mouth. Nostrils nearer to the end of 

 the snout than to the angles of the mouth, nearer to the mouth than to the end 

 of the snout, with an angular lobe on the valves. Diameter of the eye two fifths 

 of the width of the mouth. Mouth greatly arched, length Httle less than the 

 width. Teeth in 34 rows, broad-based; upper oblique, concave on the edges, 

 with two or three denticles on the outer edge of the base; median teeth small, 

 erect; lower teeth triangular, acute, slender, smooth, erect. Labial folds con- 



