REPORT OF COMMISSIONER OF FISH AND FISHERIES. [6] 



16 — PSEUDOTRIACIS > Capello. 



23. Pseudotriacismicrodon^ Capello. P. Eu. 



17.— GINGLYMOSTOMA Miiller & Henle. (13) 



24. Ginglymostoma cirratum Gmelin. W. P. (18) 



Family X.— GALEORHINID^. (7) 



18.— GALEUS3 (Rafinesque) Leach. (14) 

 5 Galeus. 



25. Galeus luuulatus'* Jordan «& Gilbert. P. 



1 PSEUDOTRIACIS Capello. {Paeudotriakis Capello, Jorn. Sci. Math. Phys. e Nat. 

 Lisboa, 1868, 321 ; type Paeudotriakia microdow Capello.) 



Body elongate; mouth wide, with a very short labial fold near the angle; snout 

 def)re88ed ; nostrils inferior, not confluent with the mouth ; eyes oblong, lateral, 

 without nictitating membrane ; spiracles well developed behind the eye ; gill openings 

 moderate, in advance of pectoral ; jaws with many rows of very small, tricuspid teeth ; 

 first dorsal fin long and low, highest posteriorly, inserted opj)osite the space between 

 pectorals and ventrals; second dorsal rather large, larger than anal; ventrals aud 

 pectorals well developed ; no pit at root of caudal ; caudal fin divided by a notch into 

 a short upper portion and a very low and long lower portion. Skin with minute as- 

 perities. One species known {Wsvdoi, false; rpEiaKi?, triacis). 



^ Pseudotriacis microdow Capello, Jorn. Sci. Math. &c., Lisboa, 1868, 321; Guuther, 

 VIII, 395; Bean, Proc. U. S. Nat. Mus., VI, 1883, 147. Two specimens of this spe- 

 cies are known, the type from Portugal, the second, 10 feet in length, lately taken 

 at Araagansett, on Long Island. (Bean.) 



^Galeus Rafinesque. QMus elus Cuvier.) 



(Rafinesqur, Caratteri di alcuni nuovi Generi,1810, 13: vuljiecnlus, melastomus, catu- 

 lu8 and mustelna : Galeus Leach, Observ. Genus Squalus of Linn6: 1812, 62, tj^pe 

 Sqnalus mustelua Leach ^ Sq. canis Mitchill.) 



The name Galeus was first used in binomial nomenclature by Rafinesque, for a 

 genus thus defined : 



"VIII. G. Galeus. — Due spiragli, due ale dorsali, un ala anale, cinque branchie 

 da ogni lato ; coda diseguale, obliqua. 



" Osservazione. La maggior parti delli Squali degli autori si annoverano in questo 

 genere, 11 quale si distingue dal vero genere Squalus della prezenza di un ala anale." 



Four species are mentioned, fulpeculus : melastomus : catulus and mustelus. Although 

 the species which the author had in mind was i)robably Squalus galeus L., it is improper 

 to assume this species as the type, as no mention is made of it by the author in ques- 

 tion. 



In 1812, Leach proposed a genus Galeus, to include sharks with the anal fiu present 

 and the caudal fiu irregular (i.e., not lunate). But one species, Galeus mustelus,- is 

 mentioned by Leach. Still later, a subgenus, Galeorhinus, was proposed by Blaiu- 

 ville for sharks distinguished from Carcliarinus Blaiuv. {^Carcharias Cuvier), by the 

 presence of spiracles. In this group are Included with others, Squalus mustelus and 

 Squalus galeus of Linnajus. Still later (1817), the gouura Mustelus, Carcharias, anA 

 Galeus were defined by Cuvier, and with his definition have been accepted by nearly 

 all later authors. 



The rules of nomenclature seem to me to require the retention of the genus Galeus 

 Rafinesque, for the group for which the same name was used by Leach, i e., instead of 

 Mustelus Cuvier. 



* Mustelus lunulatus Jordan <fe Gilbert, Proc. U. S. Nat. Mus., 1882, 108; Mazatlan, 

 Mexico. 



In this paper is given an analysis of the distinctive characters of the four North 

 American species of Galeus : — lunulatus, caiiis, dorsalis, and californicus. 



