874 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 



Page 24. Instead of Aprionodon punctatus read : 

 29. A. isodou (Mull. & Henlo) Gill. 



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

 The name punt-tat us is very doubtfully applied to this spedes, as the 

 Si/tKil/ix jtiotctatus of Mitchill is as likely to have been C. temcnocce. A. 

 isodon should be suppressed from our lists until its alleged occurrence 

 in our waters is verified. 



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

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

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

 cies 31 should be 

 S. tiburo (L.) Raf. 



The correct reference to the description of SpJiyrna is 

 (Ratinesque, ludice 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, 1636: type Squaltta ferox Risso.) 



The American species should stand as 

 31. O. littoraDis (Mitch-) J. &, G. 



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

 identification. 



Page 28. Instead of Isurus glaucus read : 



35. I. dckayi (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; first dorsal inserted behind pert oral at a 

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

 \'{. Middle teeth very long, much longer and narrower than lateral 

 tei-th. Length 10 feet, (.'ape Cod to VTest Indies. The American spe- 

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

 and higher dor>al. 



(Lniiiim jiiiiii-liitu I>i-k:iv. \i-\v York F:mn:i, Fi>liex, 1SJ-J, :!.VJ (not Siiiinhm fiunctatnH 

 Mi tcli.) : Imtro/mix ili-kni/i (Jill, Am. Lye. N. Y. 1858, 153: Ituroprie glauou* Tory, .Syuops. 

 J'isc. Cubfiis, not Oxtjrlnnn ijliiitt-n M. A. //. ?) 



Page 29. Instead of /\ ///?<* o.ryrlnjHchw read: 



36. I. spalfluiixaiiii \: < 



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



