262 PROCEEDINGS OP THE ACADEMY OF 



EULAMIA MlLBEKTl GUI. 



Squalus carcharias Mit. 



Carcharias (Prionodon) Milberti ( Val.) M. and H. 38. 



Carcharias caeruleus DeKay, 349, pi. 61, f. 200. 



Lamna caudata DeKay, 354, pi. 62, f. 205. 



Squalus (Carcharinus) caudata Gray, 44 (excl. syn.) 



Squalus (Carcharinus csruleus Gray, 44. 



Squalus (Carcharinus) Milberti Gray 45. 



Squalus Milberti Gill, Cat 59. 



Squalus caeruleus Gill, Cat. 59. 



Eulamia Milberti Gill, Squali 44. 



The specific name here adopted was applied in MSS. by Valenciennes to a 

 specimen sent from New York by Milbert, and was retained for a species to 

 which that specimen, one from Leyden and one in the Museum of Berlin, ob- 

 tained by Hemprich and Ehrenberg, were referred. The specimen on which the 

 description and measurements were especially based is not specified. The de- 

 scription agrees quite well with the Carcharias cxruleus of DeKay. 



The Carcharias cxruleus was established on a young female, and the Lamna 

 caudata on the figure of an adult female obtained from Mr. Brevoort, to whom 

 I have been indebted for the information. 



That gentleman has shown to me the original drawing of which DeKay's fig- 

 ure was a professed copy. It is drawn with Mr. Brevoort's wonted accuracy, and 

 distinctly represents the last branchial apertures above the pectoral fins ; the 

 species is, therefore, a true Eulamia, as its form indicates, and as was suspected 

 by Dr. Gray. 



With the European form, Nardo has identified his Squalus plumbeus as well as 

 the S. Ccecchia of Chiereghin. 



PLATYPODON Gill. 



Platypodon obscueds Gill. 

 Squalus obscurus Les. 

 Carcharias obscurus Dekay, (not Storer.) 

 Carcharias (Prionodon) obscurus 31. and H. 

 Squalus (Carcharinus) obscurus Gray. 



Messrs. Putnam and Nason have favored me with notices and partial figures 

 of a shark taken on the coast, and preserved in the Museum of Williamstown 

 College, which appeared to apply to this species. It is scarcely necessary to 

 remark, that the teeth, represented by Lesueur, have been reversed, the wider 

 one belonging to the upper and the narrow to the lower jaw. 



APRIONODON Gill. 

 Apkionodon punctatcs Gill. 



Squalus punctatus Mitch. Trans. N. Y. i. 484. 

 Carcharias (Aprion) isodon (Val.) M. and H., 32. 

 Squalus (Aprion) isodon Gray, 43. 

 Aprionodon punctatus Gill, Cat. 



Ilab. New York. 



" Iris, oblong and vertical. 



" Teeth small, triangular and without jagged edges. 



" First dorsal situated about the middle of the back. The second dor- 

 sal membranous, somewhat adipose, and of a rhomboidal figure. A 

 anal fin corresponding (opposite) to the second dorsal. 



"The caudal fin very unequally divided ; the tipper section being almost thrice 

 as large as the lower, and having a process on the lower side." (Mitchill.) 



The Squalus punctatus, therefore, cannot be a species of Lamna as long sup- 

 posed, nor yet a species of Eulamia, Platypodon, or even Scoliodon, with which, 

 smonQ- known American species, it can alone have affiities. 



[Nov. 



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