230 EXPEDITION OF THE " ALRATROSS," 1899-1900. 



In atlflition to the type, there is a co-type, of equal size, from the 

 same locality. 



Dr. Braucr has kindly re-examined the types of D. sjilemlklus at the 

 request of the writer and states that the ventral is always inserted under 

 the beginning of the dorsal, the supraorbital region projects always above 

 the eye as shown in the figure, and the snout, although somewhat variable 

 in length, is always more than half the diameter of the eye. In three speci- 

 mens in which the .snout is 1.5 cm., 1.75 cm. and 2 cm. long, the diameter 

 of the eye is 2.1 cm., 2.2 cm. and 2.5 cm. in length. 



Lampanyctus townsendi (Eiqenmann and Eigenmann). 



Plate 4. 



Myctophum townsendi Eioenmaxn an<l Eigenmann. West American Scientist, 1889, p. 12i5, 

 from C'ortez U.aiiks, south of San Diego, California. 



A single young specimen, 26 mm. long, from Hydrographic Station, 3797 

 (A. A. 25), near Ua Huka Island, Marquesas Group, taken with the open 

 intermediate net between the surface and 300 fathoms. 



Measurements in hundredths of length without caudal : Length of head 

 34 ; diameter of eye 10; length of snout 7 ; length of maxillary 25 ; great- 

 est depth of head 20.5 ; distance from snout to dorsal 49 ; to ventrals 48 ; 

 to anal 63 ; to adipo.se fin 79 ; least depth of caudal peduncle 9. 



Dorsal 13 ; anal 13 ; pectoral 14 ; lateral line 38 ; well-developed gill- 

 rakers 4 + 11, in addition to two short rudiments on vertical and three on 

 horizontal limb of arch. 



Body slender, snout short but not bluntly rounded, the premaxillaries 

 mesially about on the level of middle of orbit; maxillary obliijue, noticeably 

 but not greatly widened at tip, extending beyond eye a distance about 

 equaling half diameter of orbit. Teeth in very narrow bands, nmndibular 

 teeth straight, the inner series somewhat longer than the outer; in the pre- 

 maxillaries, the inner .series is more enlarged, the teeth strongly curved. 

 Preopercular margin rounded, little oblique. 



Pectorals mutilated ; ventrals reaching at least to front of anal, probably 



