240 Memoir Sears Foundation for Marine Research 



caudal Is relatively longer with slightly convex lower margin, that the origin of the ist 

 dorsal is relatively somewhat farther back, that the dorsals are more broadly rounded, 

 that the tips of the pelvics are relatively much shorter, and that the eyes are relatively 

 much larger (embryonic characters to be expected) ; the color pattern is not only more 

 pronounced but more extensive, as noted above. There is no placental attachment between 

 embryo and mother. 



Habits. The recorded depths of capture of this little Shark range only between 235 

 and 335 fathoms, but since the trawls that yielded them were hauled up to the surface 

 open, the specimens may have been swimming at some mid-depth and not on bottom. 

 Nothing more is known of its habits. 



Range. So far known only oflF the north coast of Cuba in the offing of the province 

 of Santa Clara, where it must be tolerably plentiful, judging from the number of speci- 

 mens taken. 



Synonym and References: 



Triakis barbouri Bigelow and Schroeder, Proc. New Engl. zool. CI., 23, 1944: 27, pi. 8 (descr., ill., Cuba) ; 



Bigelow and Schroeder, Guide Comm. Shark Fish., Anglo Amer. Caribb. Comm., Wash., 1945: 124 



(descr., ill., range). 



Genus Mustelus Link, 1790^ 

 Smooth Dogfishes 



Mustelus Link, Mag. Physik Naturg. Gotha, 6 (2), 1790: 31 ; type species, Squalus musttlus Linnaeus, 1 758. 



Generic Synonyms: 



Galeus (in part) Rafinesque, Indice Ittiol. Sicil., 1810: 46 (includes Squalus mustelus Linnaeus, 1758) ; Leach, 

 Mem. Werner. Soc. Edinb., 2, 1812: 62 (includes Squalus mustelus Linnaeus, 1758); not Galeus Rafi- 

 nesque, Carratt. Gen. Nuov. Sicil., 1 810: 13; see p. 214. 



Galeorhinus (in part) Blainville, Bull. Soc. philom. Paris, 1816: 121. 



Myrmillo Gistel, Naturg. Tier., 1 848: 4; substitution for Mustelus Link, 1 790; not seen. 



Pleuracromylon Gill, Proc. Acad. nat. Sci. Philad., 1864: 148; type species, Mustelus laevis Risso, 1826. 



Rhinotriakis (in part) Jordan and Gilbert, Bull. U.S. nat. Mus., 16, 1883: 60; includes Mustelus laevis Risso, 

 1826. 



Galeus Jordan and Evermann, 1896, Bull. U.S. nat. Mus., 47 (l), 1896: 29; for Mustelus dorsalis and M. 

 californicus Gill, 1864; not Galeus Rafinesque, Carratt. Gen. Nuov. Sicil., 1810: 13. 



Cynias Gill, Proc. U.S. nat. Mus., 26, 1903: 960; type species, Squalus cants Mitchill, 1815. 



Cynais Fowler, Proc. Acad. nat. Sci. Philad., 60, 1 908: 55 ; evident misprint for Cynias. 



Galeorhinus Giiman, Mem. Harv. Mus. comp. Zool., 36, 1 91 3: 169; same as Mustelus Link, 1 790, substituted 

 because of the diversity of application of the latter; not Galeorhinus Blainville, 18 16, the type species of 

 which is Squalus galeus Linnaeus, 1 75 8, desig. by Gill, Ann. N. Y. Lye, 7, 1862: 402. 



1. The International Commission on Zoological Nomenclature has ruled that Mustelus Link, 1790, is applicable 

 to sharks, in spite of the fact that Mustela was earlier used by Linnaeus, 1758, for weasels. See Opinion 93 

 (Smithson. misc. Coll., 75 [4], 1929: 8; and Science, N. S. 6$, 1927: 300). 



