526 Bulletin 4.J, United States j.Vational 2fuseuni. 



aa. Scales nearly or quite smooth. 



b. ]?o<ly rather tleop, the do|)th Ti}.;^ in length; srales 40 to 45; eye shorter than snout. 



.siAU.s, 798. 



6b. Body rather slender, the dcptli iihout 7 in leugtli; scales aliout 51; eye longer than 



snout. STRIATA, 799. 



797. ARGENTINA SILUS, Ascanius. 



Head 4i; depth 5^; eye 2f. B. G; D. 12; A. 13; V. 14; scales 

 3-60-4 (66, Giintber). Body compressed. Head not quite twice as long 

 as deep ; snout nearly 31 in head. Insertion of dorsal midway between 

 snout and adipose fin; ventrals under last ray of dorsal. Scales very 

 largo, cycloid, covered with spinules, the points of which are turned 

 backward; a median row of scales along the back and belly. Color 

 olivaceous ; sides silvery. Length 17 inches. Northern Europe, occa- 

 sionally taken on the Grand Banks and off the coast of Maine. (Goode 

 & Bean.) (Slid, Norwegian word for Herring.) 



Arijeulina silus, Ascanius, Icon. Rev. Nat., pi. iii, 3, 24, 1763, Norway; Joruan it Gilbert, 



Synopsis, 294, 188.3; GO.vther, Cat., vi, 202, ISCfi. 

 Silus ascanii, Keinhardt, Bemserk. Skandinav. Ichth., 11, 1833, Norway. 

 Argentina siiHensinm, Goode & Bean, Proc. TJ. S. Nat. Mus., 1878, 201, off Sable Island in 200 



fathoms, from stomach of Phijcis lemm. (Type, No. 21G24. Coll. R. L. Newcomb.) 



798. ARGENTINA SIALIS, Gilbert. 



Head 3 ; depth oi; eyeSi; interorbital width 4. D. 11; A. 12. Resem- 

 bling ArijoHiua clonf/ata, but with a much deeper body, and a larger eye. 

 Length of maxillary from tip of snout 4 in head, Ij in snout. Snout but 

 little longer than eye, 3'; in head ; upjier jaw with a narrow band of small 

 teeth borne on the vomer and the front of the palatines, not on the very 

 narrow weak premaxillaries; lower jaw toothless; edge of tongue with 

 a series of strong, backwardly curved teeth, six or eight in number. 

 Gill rakers numerous, slender, rather short, about 25 in number below 

 angle of arch. Front of dorsal fin nearer tip of snout than base of caudal 

 by a distance equaling diameter of pupil. Ventrals inserted behind mid- 

 dle of dorsal, midway between base of caudal and front of orbit, extend- 

 ing but little more than halfway to front of anal; caudal forked. 

 Scales not spinous, the margins entire, a few only preserved along sides 

 of tail ; 40 or 45 in a longitudinal series. Eye, streak along sides and 

 sides of head, silvery ; occiput and snout dusky ; a black blotch above 

 each eye; fins somewhat dusky : mouth and gill cavity white ; peritoneum 

 black. Length 3 inches. Coast of California. One specimen known. 

 {sialis, a word first used by Swainson to mear. plump, from aia?^u(;, plump.) 

 Jrgoilind sialis, Gilbert, Proc. U. S. Nat. Mus., 1890, 56, Albatross station 3017, in 58 

 fathoms. (Coll. Gilbert.) 



799. ARGENTINA STRIATA, Goode * Bean. 

 Head 3 in total length ; depth 7 ; eye 2^, longer than the conical snout. 

 D. 10; A. 11; P. 17; V. 14. Ventrals nearly median, their insertion under 

 the penultimate dorsal rays. Scales in lateral line obliquely striate. 

 Tongue with teeth. Origin of dorsal equidistant between snout and 

 root of caudal. There appears to have been a silvery, longitudinal band 

 under the lateral line. 



