878 Bulletin 4y, United States National Afuseum. 



(id. Latoral lino obsolfito or nearly so; tinlets 2; skin with bony tubercles. 



RUVETTUS, 397. 

 cc. Dorsal and anal each without fuilets; lateral line i)resent, double. 



El'lNNUI.A, 398. 



bb. Veufral fins each reduced to a single spine. 



«. Dorsal fin moro or less separated from soft part of tbo fin; body not greatly elou- 



gate; finlets few or none. 



/. Siiaco between vent and anal fin armed with a dagger-shaped spine; lateral 



line present, single; 2 or 3 finlets present. Neai.otus, 399. 



j}'. Sjiaco between vent and anal without daggor-shajied spine; finlets 2; lateral 



lino single; ventrals minute; (young without finlets and with the ventral 



spines very long and jagged). Promethkiithys, 400. 



Gempvun-k: 



aa. Body greatly elongate, the dorsal fin with about 30 spines, the spinous part continuous 

 with the soft part ; dorsal and anal finlets (J; dentition strong; ventrals I, 5, very small. 



Gempylus, 401. 



396. BIPINNULA, Jordan & Evermann. 



Ilipiiiimla, JonnAN & Eveumann, new genus, (viohwin). 



Body subfusiform, elongate, low, uniform, slender; bead compressed; 

 lower Jaw longest, botb jaws witb small teetb ; teetb on vomer fang like. 

 First dorsal low, uniform, of 20 slender spines, tbe fin near soft dorsal, 

 tbe anterior lobe of wbich is moderately developed ; finlets 2, anal spines 

 3, a dagger-sbaped spine before it. Ventrals moderate, I, 5; pectorals 

 inserted low. Scales tliin, cycloid, deciduous ; lateral line single. No 

 gill rakers. One species known. Dr. Gill divides tbe genus Thyrfiitcs, 

 Cuvier & Valenciennes, into Thyrsites* witb 6 or 7 finlets, tbe lateral line 

 abruptly decurved, and TluirsUopi<,] witb 4 or 5 finlets, and tbe lateral 

 line nearly straigbt. Tbe American species, riolacea, witb 2 finlets, and 

 tbe lateral line ligbtly curved is still better distinguisbed, and sbould 

 probably constitute tbe type of a new genus, for wbicb we projiose tbe 

 name Bijnnniila. (his, two ; jnnnula, finlet.) 



1267. BIPINNULA YIOLACEA (Bean). 



Head 4; depth 8. D. XX-I, 19 + 11; A. 17 + III; V.I, 5; P. 13. 

 Widtb of interorbital area slightly greater than length of eye, wbicb is 

 contained nearly 7^ times in length of head and 3i times in length of 

 uijper jaw. Least height of tail equals width of interorbital area. 

 Length of snout twice that of longest dorsal spine, and i distance from 

 snout to origin of spinous dorsal. Maxilla extending to vertical through 

 front of eye. Length of upper jaw equals 3^ times width of interorbital 

 space. Mandible reaches to vertical through bind margin of eye ; its 

 length, including the fleshy tip, is 5 times widtb of interorbital area. 

 Anterior nostril smaller than posterior; situated in advance of eye 1 

 diameter of eye. Posterior nostril a narrow slit placed midway between 

 anterior and eye. Strong teetb on intermaxillary and mandible. Three 

 large fangs anteriorly in roof of mouth ; pseudobranchite well developed ; 

 no trace of gill rakers. Spinous dorsal begins at a distance from snout 



* Thyrsilcx, CuviEU & Valenciennes, Hist. Nat. Poiss., viii, 19G, 1831, {uliin). {Thi/rsiles, an 

 old name of some fish, from Bvpuoi, a wand.) 



t Tlii/rnilupK, Gill, Proc Ac Nat. Sci. Phila., 1862, 125, (lepidupuUles). 



