Jordan and Evermann. Pishes of North America. 575 



864. DASYSCOPELUS SPINOSUS (Steindachner). 



Head 4 to 4i ; depth 4 to 4*. D. 13 ; A. 19 ; scales 40-9. Body short, 

 the snout very short ; eye large; scales ctenoid; caudal spots 2 ; ventral 

 spots more than 4; posterolateral spot single; supra-anal spots 3, forming 

 an oblique series ; anal spots 12 to 14; preopercular margin almost vertical. 

 Open seas, known from the mid- Atlantic, Hawaiian Islands, etc. (Lut- 

 ken.) (spinosus, spinous.) 



Scopehts .i^<ww<.s, STEINDACHNER, Sitzgber. Ichth. Notiz., v, 11, 1867, China; Lth'KEN, Spolia 

 Atlantica, Scopelini, 19, 1892. 



269. TARLETONBEANIA, Eigenmann & Eigenmann. 



Tarletonbeania, EIGENMANN & EIGENMANN, Proc. Cal. Ac. Sci., iv, 1890, 7 (tenua). 



This genus is close to Nyctophum, differing chiefly in the entire absence 

 of the lateral line. (Named for Dr. Tarleton Hoffman Bean. Ichthyologist 

 of the United States National Museum, who has written largely on deep- 

 sea fishes and on the fishes of the eastern Pacific.) 



a. Ventral outline more arched than the dorsal; ventrals short, not reaching halfway to vent. 



CRENULARIS, 865- 



oa. Ventral and dorsal outlines about equally arched; ventrals reaching halfway to seventh 

 anal ray. TENUIS, 866. 



865. TARLETONBEANIA CRENULARIS (Jordan & Gilbert). 



Head 3f; depth 4fc. Eye large, 3i in head. D. about 12; A. about 

 16; scales about 45. Caudal spots probably 2, making with the anal 

 and postlateral spots a series of 21 ; 6 ventral spots. Body much com- 

 pressed, bluntly convex anteriorly, tapering behind. Caudal peduncle 

 long and very slender ; ventral outline more arched than dorsal. Head 

 short and high, the snout very blunt. Scales of sides crenulate, those of 

 back with acute crenations, but no spines; no lateral line. Origin of 

 dorsal nearer snout than base of caudal ; caudal peduncle with 2 or 3 

 spinules (exserted tips of vertebral processes) ; ventrals reaching not 

 halfway to vent ; pectorals to base of ventrals. Color dark steel-blue. 

 Santa Barbara Channel ; coast of Washington ; two small specimens 

 known, one from the stomach of an albacore, the other blown on a vessel 

 during a storm, (crenularis, slightly scalloped.) 



Myctophum crenulare, JORI>AN & GILBERT, Proc. U. S. Nat. Mus., 1880, 274, Santa Barbara. 



(Type, No. 27402. Coll. J9rdan & Gilbert.) JORDAN & GILBERT, Synopsis, 282, 1883. 

 Myctophum procellarum (Bean MS.) JORDAN, I. c., 457, off Straits of Fuca. 



866. TARLETONBEANIA TENUA, Eigenmann & Ei-enmann. 



Head 3f; depth 4^. D. 12; A. 17. Caudal spots probably 2, making 

 a series of 16 with the anal spots ; 6 ventral spots ; a posterolateral 

 spot ; 3 supra-anal spots in an oblique series ; 5 thoracic spots. Body 

 moderately deep, greatly compressed, the caudal peduncle very slender, 

 its depth 4^ in greatest depth of body ; ventral and dorsal outlines equally 

 ardied. Preopercular margin nearly vertical, the head formed as in 

 M. humboldtl. No lateral line ; scales of sides much larger than those of 

 back or belly ; smaller scales denticulate, larger crenulate. Origin of 

 dorsal midway between tip of snout and base of caudal ; anal larger 



