ADDITIONS TO FAUNA OF SAN DIEGO. 7 



4. Tarletonbeania tenua sp. nov. 



Type: a single specimen .073 m. October 31st, 1S89. C. H. E., collector. 

 The single S]5ecimen was taken out of the mouth of Sebastodes iiiiniaiiis. 

 It probably came from near the Coronado Islands. 



Head 39/4 ; depth 41^ ; D. 12; A. 17. 



Greatly compressed; highest at shoulders, tapering to 

 the very slender caudal peduncle, whose depth is 41^ in 

 the greatest depth, its width a little more than half its 

 height. Ventral and dorsal outlines equally arched. Head 

 as in Myctophnvi caUfoniiciisc; the preopercular margin 

 little inclined. 



Scales of back and belly rather small, those of the sides 

 much larger, the smaller scales strongly denticulate; 

 the larger ones crenulate, all thin, deciduous. 



Origin of dorsal equidistant from tip of snout and base 

 of caudal; adipose fin nearer dorsal than caudal. Length 

 of caudal equal to the base of the dorsal. Anal basis long, 

 4 in the length. Ventrals reaching half wa}' to seventh 

 anal ray; pectorals to ventrals. 



No spines above or below on the caudal peduncle. 



Five pairs of phosphorescent spots in front of the ven- 

 trals ; six pairs between ventrals and anal; sixteen be- 

 tween the origin of the anal and caudal ; one spot above 

 the last of those along the base of the anal; three extend- 

 ing in an oblique series from the last of the abdominal 

 spots upward and backward; one above the first of the 

 abdominal spots; one on the lower margin of the anal 

 basis; another in front of the middle of the pectoral, be- 

 low which is another near the ventral series. 



This specimen differs from the description of M. crenu- 

 lare in its equally arched dorsal and ventral outlines; in 

 the absence of spines on the caudal peduncle above and 

 below; in the position of the dorsal and size of the 

 ventrals. 



