6o 



BULLETIN OF THE BUREAU OF FISHERIES. 



broad V-shaped blotch, the apex of which nearly reaches base of anal; the ground color is intensified 

 along the margins of the bars which are often narrowly white; a conspicuous small, narrow, white blotch 

 at base of caudal; head unmarked, nearly as dark below as above; dorsals dusky, the rays with faint 

 alternating lighter and darker bars; caudal irregularly barred with light and dark; anterior base of 

 pectoral and prepectoral area blackish, the latter in its lower part with a horizontal whitish blotch, 

 which is concealed by the opercle; distal half of pectoral barred with light and dark, a broad white bar 

 between these and the dark basal area; axil of pectorals dusky, with two conspicuous white spots, an 

 tipper small round spot about the size of pupil at base of second, third, and foxtrth pectoral rays, and a 

 larger, less intensely white, and more nearly quadrate spot below the middle of the axil; ventrals white 

 with a few dark spots, a pair of which near tips of fins may be well marked; anal white with faint dark 

 crossbars. 



Most nearly allied to Myoxocephalus (Porocottus) sellaris and quadratus, differing in the color, the 

 smaller size of eye, the absence of prickles behind the pectoral and of pores above the anal fin, and in 

 the greater number of dorsal spines. 



Two cot>'pes were taken in tide pools at Nikolski, Bering Island. The fin rays are the same as in 

 the type. In one specimen, the dark ground color is mottled with lighter, the lower side of head is 

 much lighter than in the type, there are light roimdish spots included in the dark ground color above 

 base of anal fin and some additional light markings in axil of pectorals. 



Myoxocephalus mednius Bean. 



Taken at Agattu, Attn, Medni, and Bering Island. 



This species is closely related to Myoxocephalus {Porocottus) bradfordi; it averages one less spine 

 in the first dorsal and one more ray in the second dorsal and anal, the light spots behind the pectoral 

 in the male are more numerous and do not tend to coalesce as in M. bradfordi, and the multifid tentacles 

 on the head are much shorter and less numerous. 



Megalocottus platycephalus (Pallas). 



Avatcha Bay, Kamchatka. 



This species differs from M. laticeps from eastern Bering Sea in the narrower deeper interorbital 

 space, the higher occipital ridges which converge backwards much less than in laticeps, the more 

 prominent tubercles, the obsolescence of filaments, the much Targer plates on sides, and the darker 

 coloration. 



The accompanying table gives measurements in hundredths of length without caudal in both 

 species: 



Length of head 



Length of snout 



Interorbital width 



Distance between anterior ends of occipital ridges. . 

 Distance between posterior ends of occipital ridges . 



Diameter of eye 



Length of maxillary 



Greatest width of head 



Depth of caudal pedimcle 



M. platy- 

 cephalus. 

 Kam- 

 chatka. 



"M. laticeps, 



Nusha-^ak, 



Alaska. 



37 



9 



8.S 



9 



5 



6 

 i8 

 3° 



6 



