!o8 



venture ii}t to get beyoml tide during- almost every spring. 

 Tliere are several "runs" of this tine ii.sh in the lower Poto- 

 Miae River, wliich follow each other at inter\'als of a few days. 

 AcAi>. CoiJ,. S. 1. 



OPI^THOXEMA. (;ill. 



(). TIHMSSA. 



Tho Shad-Hei-rina', or Tliread-Herrni,ti'. 



r.oily roni2>i"t?«x<'tl, elliptical. 'I'lie height or the l)ody is 

 ()ne-t])ird of tlie total lengtli (without caudal,) tlie length of 

 the hc'a<l rather less than one-fourth. Lower jaws l)ut .sliglitiy 

 prominent. .Vhdoineu with i'ourte(?n ]»r(^ieetions lihe saw- 

 l«*fth. ])lui.sh al)Ove, with au indistinct hbu'sii spot on the 

 .shonhlcr: each scale on the hack Avith a dark s])ot, the sjiots 

 forming longitudinal scries, fvast dorsMl ray ])roduced into 

 a long tilameni . 



Fin-rays: — 1). ID; T. IS; V. S; A. 2:\ 2-1: < '. 111. 



(>. flin's.sd, ()s])eck, licise p. '.V.\i\. 



Mch-f/c ihri'S.sa, Cnv. c^' Val.. XX. p. :!S(I. 



ChatDCs.^iis si(/iii/e)\ DeKay, Xew York Faun., I'ish. [>. litri, 

 pi. 41, lig. f:!2. 



Opii^fJiOiniiKi- ihrissd, (rili, Proc. Ac. Nat. Sc. Pliilad. 1861, 



1>--'- 



hunters the trihiitaries of Chesapeake Bay in the salt wateis, 

 hut is never ahundant. Occurs annually along the coast in 

 September. Have heen hrought to tlie markets of ]5altimove. 

 hut not in large numheis. 



Ac.\i). (JoLi.. S. I. 



POMOLOBUS, Gill. 

 1*. i'sEniO]iAi!i:x(';rs. 



The Ileiriiig ; Ale-Wife of farther Xorth, 



Form elliptical, a little thiekened along the back; the curve 

 of the dorsal outline a little less than that of the ventral: 

 bellv compressed: slope behind tlie tlni'sal liu very gradual: 



