VOL .\IV,"| 

 1891. J 



PROCEEDINGS OF THE NATK^NAL MUSEUM. 

 2. Galeiis dor sails (Gill). 



129 



Mustelus dorsalis Gill, Proc. Acad. Nut. Sci. Pbila. 1864, U'J. {I'anawa). Jordan 



As (iilbert, Proc. U. 8. Nat. Mils. 1882, lUl). {I'anama). 

 Galcns dofsaUs, Jordan, Proc. U. S. Nat. Miis. 1885, 363. (Name ouly). 



A lialf dozen la*tuses of this species were sent to us by Mr. Theodore 

 Carievet after we had left Gruaymas. 



Measurements of two specimens {Nos. 190, a ^, and I'Jl, a ? ) !,in tlu foUowiiuj nsnU.,: 



Total iLDgth 



Disliiiice from snout to origin of first dorsal 



Di.st.inct) between (lor.s;i].s 



Leiiiiili of first dorsal 



Heiglil, of first dorsal 



Leij^I 1 1 of pee to in 1 



Length of second dorsal 



Height of second dorsa! 



Length of snout 



I'ip of snout to II 10 II til 



'I'ip of snout, to iioslril 



IJistaiiie between nostrils 



Width of mouth 



Tnteiorliital space 



Greatest width of head .' 



Depth of head ]][] 



Length of ventral fin '".*.\ 



Length of cl.aspers ( free part) 



Diameter of eye ' 



190, 



mm: 



182 



.18 



35 



17 



21 



19 



10 



13 



](J 



l(j 



11 



5 



II 



11 



'_'U 



« 



12 



h 



8 



191, 



m 111. 

 184 

 UO 

 38 

 18 

 18 

 21 

 13 

 14 

 17 

 14 

 11 



10 

 10 

 19 

 !» 

 10 



Tlie head is rehitively quite broad but flattened vertically, the snont 

 rather long and tapering, while the body is long and very slender, ta- 

 pering gradually to the tail. The shagreen is more or less developed 

 i over the entire body but is most i)ronouiiced on the head and along the 

 I median dorsal line; it is also well developed upon the pectoral tins but 

 It less so ou the others. 



3. Eulamia fronto (Jordau & Gilbert). 

 Tiburon. 



Carcharias fronto Jordan & Gilbert, Proc. U. S. Nat. Mas. 1882, 102. (Mazatlan ) • Ball 



U.S.FisbComiu. 18S2, 105. (Name only. .yaj:allan.) 

 Carcharhinnsfronto,.Jorihiu,Froc. U. S. Nat. Mus. 1885, 363. (Name only.) Ibid Cat 



FisbesN. A., 1885, 7. j ^ ■, ■ 



One specimen, 28 inches long, was taken by us. This shark is very 

 common in the Bay of Guaymas, where large specimens are frequently 

 taken with the hook. It often seriously interferes with hook and line 

 fishing by stealing the catch before it can be gotten out of the water 

 by the fisherman. 



Proc. N. M. Ul 9 



