322 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 48. 



number and distribution of photophores with C. emmelas Jordan and 

 Starks, from Japan. 1 



In C. macouni the branchiostegal rays vary in number from 18 

 to 20; the anal rays are 11 or 12 and the pectoral rays 11 or 12 in 

 number, 11 predominating in both fins. The lower series of luminous 

 organs are 8 + 20 to 22 + 26 to 29 + 11; the upper series, 17 to 20 + 25 

 to 27. Length of head, fifteen one-hundredths of total length with- 

 out the caudal fin; depth, 13; distance from front of base of pectorals 

 to base of ventrals, 26; from ventrals to front of anal, 41; from tip of 

 snout to front of dorsal, 23^. 



In C. emmelas the luminous organs are present as follows: Lower 

 series, 8 + 20 to 22 + 26 to 29 + 1 1 ; upper series, 17 or 18 + 26 or 27. 



ZASTOMIAS, new genus (Stomiatidae). 



Body naked; mouth very large, much as in the Malacosteids, the 

 maxillary reaching almost to mandibular joint, the latter extending 

 beyond the opercular border and well beyond the base of the pec- 

 torals. Long slender nondepressible fangs in the front of the man- 

 dible, overlapping the opposite pair, or fitting into groves within the 

 upper jaw. Maxillary toothed throughout, the posterior teeth small, 

 retrorse. Tongue and palatines with slender teeth, vomer naked. 

 Barbel very long, with enlarged tip. Pectorals inserted very low, 

 close together near the median line, the anterior ray specialized, 

 greatly thickened and probably detached, though the total absence 

 of the pectoral membrane makes it impossible to determine this point 

 with certainty. All the pectoral rays are filamentous. Ventrals well 

 behind the middle of the length, near together on the ventral surface, 

 dorsal and anal far back near the tail, nearly equal and opposite. 

 Caudal forked. Two large luminous organs on the head, two series 

 of small organs along lower side of trunk and tail, the entire surface 

 of head and body thickly beset with minute luminous bodies, much 

 as in Opostomias. Distinguished from all other genera by the very 

 large mouth, the unequal nondepressible fangs, the palatine teeth, 

 and the very numerous minute, luminous organs. 



Type of the genus. — Zastomias scintiUans, new species. 



ZASTOMIAS SCINTILLANS, new species. 



Plate 15, fig. 4. 



Type-specimen. — Cat. No. 75808, U.S.N.M., 72 mm. long, from 

 station 4540, Monterey Bay, depth 389 to 551 fathoms. 



Dorsal, 21; anal, 27; ventrals 4 on one side, 6 on the other, with- 

 out apparent injury; pectorals, 1+3. 



Measurements in hundredths of length without caudal: Length of 

 head to opercular margin, 27; length of snout, 7.8; frontal width 



i Bull. U. S. Fish Comm., vol. 22, 1902, p. 579. 



