1 68 

 (iALEOC;Elll)(), Mailer & Henle. 



G. tigrinus. 



Tiger Shark» 



Body cyiiiulrical, with a lauLkTutc iiat .sauut; caudal eiou- 

 gated; last two branchial apertures above the pectorals; anal 

 iin, with tlie anterior lobe little produced and rounded. Dis- 

 tinguished at once by its spotted body. 



(t. tigrinm, MuUer iir Henle, ]>. 59, pi. 'I'.l: Gill, Proc. Ac. 

 Xat. »Sc. Phil. IhlW, ]). 2():]. 



— macidatiis, Poey, Beport Fish Nat. Cuba, ]SllS, p. 45o. 



Sometimes enters Chesapeake l>ay, and is also on the ocean 

 •coast of Worcester county. 



MU8TELU8. C'uv. 



M. canis, 



Smooth Dog-Fisho 



The slendei' body is cylindrical, tapering, elongated. Head 

 diattened above; snout thin, obtusely pointed. Surface of 

 body rougli. Mouth crescent-shaped when o])encd, triangu- 

 lai" when closed. Teetli on the jaws, smootli, flattened, rhom- 

 i)oidal, distributed in about ten rows. Both dorsal fin simi- 

 lar in shape; caudal fin bilobed. Lengtli 2 to 4 feet. Uni- 

 form dull ashen-grey; white beneath. Upper edges of dor- 

 sals and anal bordered w^itli black; ventrals and anals opaque 

 •white; lower lobes of caudal bordered witli vrhite or greyish. 



31. cani.s, Storer, Amer. Acad. IX, 1867, ]». 227, pi. 37, 

 iig. 2; DeKav, New York Fauna, Fi.slies, p. P)'),"), pi. 04, fig. 

 .201). 



Very common on the coast of Worcester county and on th'- 

 ■suuthern <hores of tiu^ Eastern ])eninsnla. 



Ac.M>. Coll. S. 1. 



LXX— SFMACIDE, 



8QUALUS, Artedi. 



S. americanus. 



The Spiked Dog-Fish» 



llathcr more robust than the "Smooth I)o<;-iish,'" with a 

 shorter muzzle. It has two dorsal fins, with a spine before 

 each. The skin is rough, with the asperities directed back- 

 -^A'ards. The scales heart-shaped, with a central spine directed 



