620 PROCEEDINGS OF THE ACADEMY OF £DeC. , 



MYCTOPHUM PHENGODES IN THE NORTH ATLANTIC. 

 BY HENRY W. FOWLER. 



Myctophum phengodes (LUtken). 



S.[copelus'] phengodes Liitken, Kongel. Dansk. Vidensk. Selsk. Skrift. 

 (K^benhavn), 6e Ra5ke, VII (1890-94), 1892, p. 253, fig. 11. 



No. 7,987. From the Atlantic Ocean, in 60° N. Lat., ])et\veen 

 Greenland and North America. Dr. I. I. Hayes. 



Form of the body of the fish elongate and compressed, and 

 much as in Goode and Bean's figure (No. 84) of Myctophum 

 remiger. The greatest depth of the body is about the pectoral 

 region, and it is contained in the body (excluding caudal) about 

 4 times. 



The head is rather large and about 3f times in the body (^'ith- 

 out caudal), blunt and compressed. Ej'es large and anterior in 

 position, about 2|^ in the head, and while less than the greatest 

 posterior part of the interorbital region they are larger than the 

 least, or anterior, width of the same. Mouth large, the distal 

 expanded extremity of the maxillary posterior to the eye for nearly 

 the length of the snout, and the mouth-cleft itself occupies f the 

 length of the head. Margin of the preoperculum slopes slightly 

 posteriorly and forms a slightly convex curve which bulges poste- 

 riorly. Nostrils directly anterior to the eye and placed laterally 

 upon the blunt snout. Pseudobranchia? large. Gill-rakers long 

 and slender upon the first arch, some longer than the gill-fila- 

 ments. Tongue narrow, knobbed, and free anteriorly. ^linute 

 villose teeth upon the jaws. 



Origin of the D. nearer the tip of the snout than the base of 

 the caudal. Base of D. a little more than h the base of .the A. 

 Base of last D. ray over the origin of the A. The P. are long 

 and pointed, and with their tips extending nearly to the anus and 

 almost to the medio-laleral photophores. Origin of the V. a little 

 anterior to the origin of the D. and the tips of the fin extending 

 to the origin of the A. Adipose D. a little nearer the base of the 

 caudal than the base of the last D. ray, though the posterior mar- 

 gin of its own posterior moiety is anterior to the base of the last 



