11. ALEPIDOSAURUS. 423 



2. Alepidosaurus altivelis. 



Alepisaurus altivelis, Poey, Mem. Cuba, ii. p. 302. 



B. 7. D. 40. A. 17. P. 16. V. 13. 



The length of the head is more than twice the height of the body, 

 and contained six times and one-fourth in the total (with the caudal). 

 Dorsal fin much elevated ; pectoral elongate, but terminating at a 

 great distance from the ventral ; ventral about half as long as the 

 head. (Caudal lobes equal in length ?) (Poey.) 



Cuba. 



Poey had the opportunity of observing a second specimen which 

 slightly differed from the type of A. altivelis, but not considering his 

 materials to be sufficient for defining specific characters, he wisely 

 abstained from creating a nominal species ; whilst Mr. Gill would not 

 let this opportunity pass of associating his name with a form of which 

 he had very little knowledge. Accordingly he named it Caulopus 

 poeyi, Gill, Proc. Acad. Nat. Sc. Philad. 1862, p. 131. Not satisfied 

 with this, he forms another species, " at least very nearly related to 

 C. poeyi," from the mutilated remains of a specimen discovered at 

 Monterey ; he names it Caulopus serra, Gill. 



3. Alepidosaurus borealis. 



Caulopus borealis, Gill, Proc. Acad. Nat. Sc. Philad. 1862, p. 128. 

 D. ca 34. V. 13. The ventral fins are said to be at least as long 

 as the head. 



This species is very imperfectly known, being founded on a speci- 

 men of which the head and a part of the fins only were preserved ; 

 it was obtained in Puget's Sound. Mr. Gill describes some of the 

 teeth as " vomerine " teeth, probably taking the anterior palatine 

 teeth as such. 



