874 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY — IV. 



Page 24. Instead of Aprionodon punctatus read : 

 29. A. isodon (Mull. & Henle) Gill. 



It is doubtful whether this species has ever been taken on our coasts. 

 The name punctatus is very doubtfully applied to this species, as the 

 Squcdus punctatus of Mitchill is as likely to have been C. terra;novce. A. 

 isodon should be suppressed from our lists until its alleged occurrence 

 iu our waters is verified. 



On page 25, the genus Reniceps is probably unworthy of retention, 

 and it should be reunited to Sphyraa. The characters to be assigned to 

 the genus Sphyrna are included under the account of the family. Spe- 

 cies 31 should be — 

 S. tiburo (L.)Raf. 



The correct reference to the description of Sphyrna is — 



(Rafinesque, Indice d'lttiol. Sicil. 1810, 46.) 



On page 27, family X should be Odontaspididce. Its single genus may 



stand as — 



25.— ODONTASPIS Agassiz. 



(Agassiz, Poissons Fossiles, iii, 87, 1836 : type Squalus ferox Risso.) 

 The American species should stand as — 



34. O. liUoralis (Mitch.) J. & G. 



The prior name americanus (Mitch.) was the result of an error of 

 identification. 



Page 28. Instead of Isurus glaucus read : 



35. I. dekayi (Gill) J. & G. 



Dark bluish-gray above, white below, the color abruptly changing on 

 the tail; upper fins dusky, lower pale. Head 5 in length to tip of cau- 

 dal ; pectoral as long as head, a little longer than upper caudal lobe. 

 Dorsals and pectorals falcate 5 first dorsal inserted behind pectoral at a 

 distance equal to one-fourth head; base of dorsal 2 J in head, its height 

 If. Middle teeth very long, much longer and narrower than lateral 

 teeth. Length 10 feet. Cape Cod to West Indies. The American spe- 

 cies seems to differ from the Asiatic I. glaucus in its longer pectorals 

 and higher dorsal. 



(Lamna punctata Dekay, New York Fauna, Fishes, 1842, 352 (not Squalus punctatus 

 Mitch.) : Isuropsis dekayi Gill, Am. Lye. N. Y. 1858, 153 : Isuropsis glaucus Poey, Synopa. 

 Pise. Cubens, not Oxyrhina glauca M. & H. ?) 



Page 29. Instead of Isurm oxyrliynchus read: 



36. I. spallanzaniii Raf. 



This species should be erased, as there is no evidence of its occurrence 



