10. carchariid.t: — cakcharias, 27 



24.— ALOPIAS Ealiiu'Min.'. 1810. 



Threfihcr Sharks. 



{Alopecian Miillci- & Heule; i-oiTccted orthoj^iapliy.) 



(Rafinesque, C.aratteridi AUiiiii X. Gcncri. etc : type Alopia^ indcroKnis Ttnt\ ^S(iiialus 

 rulpes Gnioliii. ) 



The characters of the genus uro iiududed ;il)<)ve. [dAuj-o:, n fox; 



Latin, rKljX'.s. A . niljtes was known to tlie ancients as a/.(o-sy.''a: =^ fox-like.) 



33. A. vmI|»«'S (Guu'l.) Hoiiap. — Thmher; Fox-lShark : SiciuyU'-tciil ; Lonij-tail Shark. 

 A hirge sliaik, abounding in all warm seas, especially in the Mediter- 

 ranean and Atlantic. It is also occasionally taken on our Pacilic coast. 

 Known at once by the great length of the tail. 



{Squahin nilpea Gmelin, Liim. Syst. Nat. i, p. 496; Alopecias vnJpcx Giinther, viii, :?93.) 



Family X.— CARCHARIID^. 

 {The Sand Sharks.) 



Body rather elongate, the snout sharp ; mouth crescent-shaped, wide ; 

 the teeth large, long, and narrow, subulate, most of them with one or 

 two small cusps at the base, their edges entire; gill-openings rather 

 large, all of them in front of the pectorals ; two dorsals, moderate, sub- 

 equal, the anal similar ; fins, dorsal well behind pectorals ; caudal well 

 developed, with a short basal lobe and a notch toward its tip ; no caudal 

 keel ; pectorals rather short ; nQ nictitating membrane ; spiracles minute, 

 l)ore-like. Genera 1 or 2, Carchariati'Rix.t { = 0(lontaspis Ag. ; not Car- 

 vharias Vn\. = Carcluirinus) and '•'■ Eugomphodus''^ ] species 3. Voracious 

 sliarks of moderate size, c;hiefly inhabiting the Atlantic. {Lamnida', part, 

 Glinther, viii, 392; genus Odontaspls.) 



* Tocth lar<^(!, awl-shaped, all or nearly all of them witli one or two small cusps at the 



base C AUCnAiiiAS, 25. 



25.— CAKt'IIARIAS Ralinesque, 1810. 



Sand Sharks. 



{Odontaspix Agassiz.) 



(Rafinesquo, Caratteii di Alciuii Nnovi Geneii, etc.: type, aiifl o)il)i uprcim moitioned, 

 Carchariax iaiints lint.) 



Characters of the genus inchided abov^e. {/.dp/.aiioz., rougii.) 



* First and fourth teeth of the upper jaw and lirst tooth of \\w. lower simple, with- 



out basal eusps. {EitfjompliodiiH (lill.) 



34. C ainci'icilBlUS (Mitch.) .Tor. &, Gilli. — Sand Shark; Sliord-iio-sc. 



Body elongate, its depth one fifth the length ; head rather pointed, 

 about .one seventh of the length ; fins small, the first dorsal not much 



