MUSEUM OF COMPARATIVE ZOOLOGY. 165 
The ventral well in advance of pectoral, close to humeral symphysis, the 
rays being placed very close together at their origin, the length of the fin 
(13 mm.) contained about 9 times in the total length, about 3 times in distance 
from its origin to the vent. 
The caudal has about 10 rays; its length is contained about 8 times in the 
total length. 
Color, yellowish white, with a broad vertical band of black from the origin 
of ventral nearly to the vent, another similar and narrower band above it upon 
each side. 
Bregmaceros atlanticus, n. sp. 
Specimens were obtained by the “ Blake” at the following stations : — 
xorx. Off Granada. 90 fathoms. 3 spec. 
CV. ? 2 1 «& 
oxi. Off Neris. 305 fathoms. | 
CLXxxv. Lat. 25° 33’ N. Long. 84° 21’ W. 101 fathoms. L$ 
The species agrees very closely with the only other known species of the 
genus, B. macclellandii, Thompson (= Calloptilum mirum, Richards.), from the 
Western Pacific, from which, however, it differs in the lesser number of rays 
in the first anal, and in the greater height of the vertical fins (judging from 
figures. 
The type (cv.) is 46 mm. long to base of caudal. Form compressed, mod- 
erately elongate. Body height (6 mm.) 72 in its length. Interorbital area 
convex, its width (2} mm.) greater than diameter of eye (2 mm.), which is four 
in length of head (8 mm.). Length of head 53 in total. Jaws even in front. 
Maxilla reaches to vertical through middle of eye ; the mandible to vertical 
through its posterior margin. 
Teeth on intermaxillary minute, apparently in a single series, mandibulary 
teeth biserial, the inner teeth enlarged. 
Scales large, about 10 in a transverse series, about 65 in a longitudinal 
series. 
Cephalic appendage reaches nearly to base of first dorsal, its length (10 mm.) 
44 in total. 
Distance of dorsal from snout (17 mm.) 23 in total ; that of anal the same. 
The dorsal and anal fins received in a groove formed by the scales along 
their bases. 
Anterior portion of second dorsal and second anal less elevated than in 
B. macclellandii. The differentiations between the developed and undeveloped 
rays of the anal are so slight that the limits of the so-called anterior and pos- 
terior sections of the fin cannot be determined. 
Length of the longest anal ray (22 mm.) about 2 in body length. 
D. 1415-16. A. 15-16 +2 (7 or 8) + 21-22. 
