26 CONTRIBUTIONS TO NOR III AMERICAN ICHTHYOLOGY - IV. 



beneath ; lic.nl I. 1 , in length, (! to tip o' caudal; width of head slightly 

 U^N than length i>!' head. I,. .'! to <i feet or more. Atlantic Ocean; 

 abundant southward; ranging to China. 



i X'lmiln* tilini-o L. S\-i. N;itur:;-: /i/i/inia lihitnt (iiiuthrr. viii, :$8'J.) 

 3. SPIIVKNA K'alinrs.nu-. lulu. 

 Iliiiitnirr Itcinl N / 



( Klc-iu) (iill : Zi/i/ii'ii(t I'uvitT ; pivurrupird.) 

 i Kaliin's<|iir. <';inittrri di Alciuii Nimvi (Jcnrri. etc. : type >>// ;//</ L.) 



Head truly ' hainnicr" -shaped, the anterior, lateral, and posterior mar- 

 gins distinct; nostrils near the eyes, the openings continent with a 

 -Toovr, which extends alonj? most of the front margiu of the head. 

 Species few. reaching a lar^e si/e ; found in all warm seas, (aipnim, a 

 hammer.) 



3iJ. S. y.\K;rn;i i I,.) M. A^. II. lliiiniit<-r-ln-<nl<'<l Shark. 



Width of head about twice its length ; lii'st dorsal large; second quite 

 small, smaller than anal; pectorals rather large; color gray. A large 

 shark, found in all warm seas; common on our coast from Cape Cod 

 southward. 



(Sifimliifi :II;/:IIHI L. Sy.si. Natunr: Zygoma mtilh'it* ( iiiut IHT, viii, 1?S1 : Zi/yfFna mal- 

 9torer, l-'isl 



SUPER-FAMILY LAMNOIDEA. 



i Tin: L>nnoi<l Sharks.) 



FAMILY IX. ALOPIID^E. 



(The Tlumlur Hlutr!;*.) 



liody moderately elongate; the snout rather short; mouth crescent- 

 haped; teeth e<|iial in bot h jaws, moderate si/.ed, tlat , t riangular, not 

 serrated; the third tooth of the ni>perjaw on each side much smaller 

 than the others; gill-openings moderate, the last one above the root 

 of the pectorals; m> uirt!tfiii<i incmhrtmr ; sj)iracles just behind eye, 

 minute or absent; first dorsal large, midway between pectorals and 

 vent nils; second dorsal and anal very small; caudal fin exceedingly 

 Inn^, alM.ni as lung as the rest of the body, a pit at its root, a notch on 

 the upper lobe near its tip ; lower lobe moderately developed ; no caudal 

 keel; ventraU rather lar-e; pectorals very large, falcate. A single, 

 Species, ivachin- a lar-e si/e. inhabiting most seas; known at once by 

 the -real len-tli of the caudal lin. ( Lam iiida; part, (iiinther, viii, p..')93; 



