403 COXTRIBTTIOXS TO xoimi AMERICAN ICHTHYOLOGY iv. 



dark points. Scales small, smooth, and firm, closely imbricated, their 

 edges crenaie. Maxillary not reaching to pupil, i'reinaxillary very pro- 

 tractile, curved, its posterior portion broad. Lower jaw shorter than 

 upper. First dorsal iiu over front of anal, much nearer base of caudal 

 than snout. Eye equal to snout. I Lead -U; depth 5. I). V-I, t); A. 1, 

 2i! ; L it. 1. 7.j. L. 5 inches. Coast of California; abundant in Sail Diego 

 Bay. 



' .Ithcrinopx'm ti-nuin Ayivs, Proe. L'al. Ac;ul. Nat. Sci. IsiO, 76.) 



19. L,ABIETEaES Cope. 

 (Cope, Proc. Amer. Phil. Snc. I'hila. 1870, 4.~>r> : type chirontoma nicctihim Cope.) 



This genus differs from McniHiu chielly in the prolongation of the jaws, 

 both of which are produced into a short depressed beak. (/'V:c, a pair 

 of forceps ; iaOiu>, to eat.) 



<; J >. L.. sicuillus Cope. Brool; SUnrnide; Skipjack. 



Pale olive- green, translucent; lateral silvery band very distinct, 

 scarcely broader than pupil, bounded above by a dark line ; back dotted 

 with black. Body elongate, very slender, compressed. Head long, ilat - 

 tish above, narrow below. Snout slender, conic. Premaxillaries broad 

 posteriorly, very protractile, produced forwards, the snout longer than 

 the large eye. Edge of upper jaw strongly concave. Teeth very slender, 

 mostly in one series, forming a narrow band in front. Scales small, 

 thin, with entire edges. Spinons dorsal very small; soft dorsal short. 

 Anal lin long ; caudal forked; pectorals moderate. First dorsal inserted 

 somewhat behind the vent. Head JA ; depth <> ; eye . oA in head. ]>. 

 IV-I, 11; A. T, L'.']; Lat. 1. 7.~>. L. .>} inches. Ponds and sluggish 

 streams; Michigan to Iowa and Tennessee; locally abundant; a very 

 graceful little tish. 



I'li'inxlniini ^in-ill H in Cope. 1'i-oc. Arad. N'at. Sci. 1'liila. IS!."), HI: I.<tbi<Jcnt1i<'x si, adits 



C'i>JM-. PrOC. AllHT. 1'llil. Sue. J'llila. 1S?(I, .Jll.) 



805). HE NIDI A* 



Silversides. 



Cnl. 

 (Bonaparte, I';iir,,r, il:ilira. aliiiat L840: l\pi- .lllnriiin nifiiitliii I..) 



I'.mly elongate, more or less compressed. Head oblong, compressed. 

 Mouth small, the gape curved, very obi i< pie, i.snall\ not reaching the eye; 



Swainson, Classin. 1'isiirs. dr. i-.;:i. . i:: < .iilnriiiniiirn lilcfkn- .-..\thn-i- 



H'.I lithi/N IJlrcUi-i- Hi l< nii/initliit.- ( Inl., all I ln--r iinniiiial ^rncra liasnl <Jii I he i^aiiic I \ \-, 



nirriini humboldltana cm. A N'al.. tVmn Mrxim). is distinguished from Mmiitin \>\ th 



vry lon-i and -trnir,' inaiidililc v.hicli |>nit nidi's ln-yuml tlic ii|ipcr ja\v. There are a 

 1V\\- vdiiicrinc ti-ctli, and the picmaxillary is c\i r.-mrly pmtract ilc. 



