604 ORDER CHONDROPTERYGI1. 



very broad and rhomboidal, the assemblage of which 

 represents certain spiral shells. 



But one species is known, which belongs to New 

 Holland, S. Philippi, Schn., Phil. Voy. pi. cclxxxiii. 

 and the teeth, Davila, Cat. I. xxii. 



Species without an anal, but provided with air- 

 holes. 



Spinax, Cuv., 



Join, like Galeus and Mustelus, to all the characters 

 of the sharks, that of the presence of air-holes, and 

 are distinguished besides by the absence of an anal, 

 by small trenchant teeth on several ranges, and by a 

 strong spine in front of each of their dorsals. 



One of the most common squali in our markets is 

 the Sq. Acanthias, L. Bl. 85. Brown above, whitish 

 underneath. The young ones are spotted with white, 

 Edw. 288 \ 



1 Add the Sagrc, Brouss. (Sq. spinax), Gunner, Mem. de Dronth. 

 II. pi. vii. The Aiguillat Blainville, Riss. 2d edit. f. 6. N.B. 

 The Squalus uyatus, Rafin. Caratt. pi. xiv. f. 2., does not differ 

 from Spinax, and is probably the Sq. spinax. I think that his 

 Dalatias nocturnus, lb. f. 3., is only a Spinax, the air-holes of which 

 have escaped him. His Etmopterus aculeatus also appears to me to 

 be a Spinax, drawn after a dried specimen. The author only gives 

 it three branchial orifices, but he reckons no more than three to the 

 angel-fish, which most certainly has five. 



