no. 2075. FISHES FROM SOUTHERN CALIFORNIA— GILBERT. 327 



posterior margins of orbit with winglike crests, which meet in an 

 acute angle below; eye not surrounded by the well-developed carti- 

 laginous plate present in some species. Eye smaller than in any 

 other known species, but apparently perfect. Its diameter is less than 

 a third the length of the snout or the interorbital width. Mouth 

 large, oblique, the maxillary extending well beyond, the orbit ; man- 

 dible slightly protruding, without symphyseal knob; inner mandib- 

 ular edges produced, the two meeting to form a low crest. Teeth 

 subequal, in narrow bands in the jaws, the palate toothless. Gill 

 rakers long and slender, 5 + 14 on outer arch, the longest nine one- 

 hundredths of the standard length; gill laminae very short, the outer 

 row on the first arch shorter than the width of the arch. Pseudo- 

 branchiae reduced to 2 or 3 filaments. Branchiostegals, 8. 



Preopercular margins nearly vertical, little elevated, the anterior 

 with two weak spinous points at angle. Opercle with a vertical and 

 a horizontal ridge, the bone marked with delicate diverging striae, 

 with uneven surfaces. 



Scales largely fallen, the few remaining with fine concentric striae. 

 On the integument of the caudal peduncle are to be seen definite 

 traces of the lateral line. 



The origin of the dorsal is slightly nearer snout than base of caudal, 

 the anal beginning under the next to the last dorsal ray. Ventrals 

 inserted slightly behind the base of the pectorals. Pectorals long, 

 extending slightly beyond the vertical from the vent, the other fins 

 mutilated so their length can not be given. Base of pectorals oblique, 

 extending downward and backward. 



In spirits, uniform blackish brown, darker on the head; caudal fin 

 yellowish. Buccal cavity and lining membrane of cheeks a lustrous 

 fight blue, the gill membranes, opercles, and jaws lined with brownish 

 black. 



Only the type is known. 



M. nycterinus is most nearly related to M. maxillaris Garman, 

 taken off the coast of Ecuador. M. nycterinus has a much smaller 

 eye, a shorter maxillary, lower cephalic crests, a longer dorsal fin 

 more anteriorly inserted, and an anal with longer base and slightly 

 more anterior position. M. cristiceps has a still longer anal more 

 anteriorly placed, much higher crests, and much larger eye, and many 

 more gill rakers. 



SCHEDOPHILUS HEATHI Gilbert. 



A young specimen 33 mm. long was found in the cavity of Pyrosoma 

 captured at station 4446, in Monterey Bay. Another specimen has 

 been more recently taken by Dr. Harold Heath near Catalina Island, 

 from the cavity of a Salpa. 



CYMATOGASTER AGGREGATUS Gibbons. 



Station 4476, Monterey Bay, 25 to 39 fathoms. 



