New York, June 24, 1916. No. 32 

 Published to advance the Science of cold-blooded vertebrates 



NOTES ON RADCLIFFE'S SHARKS AND 

 RAYS OF BEAUFORT 



In his recent publication, The Sharks and Rays 

 of Beaufort, North Carolina (Bull. U. S. Bur. Fish. 

 XXXIV, Doc. No. 822), Mr. Lewis Radcliffe has 

 given the student of these interesting forms an ex- 

 ceptionally fine piece of work, which adds greatly to 

 our knowledge of them. By the many beautiful 

 figures of dermal denticles and by the prominent 

 position which he gives the use of the microscope as 

 a means of identification, he has brought into the 

 study of the Elasmobranchii added interest and 

 greatly increased accuracy and it is to be regretted 

 that in a work which will be so constantly before ich- 

 thyologists he has accepted in its entirety the nomen- 

 clature of Garnian (The Plagiostoma, 1913) as this 

 pretty surely contains features which will not stand. 

 In my recent publication on Mobula I have used the 

 name olfersi advisedly. Specimens of this fish which 

 I sent to Paris have been compared by Dr. Jacques 

 Pellegrin with the topotype of olfersi taken on the 

 coast of Brazil in 1816 by Delalande and mentioned 

 by Muller and Henle. He has found them to be 

 the same species. Bancroft's description of hypos- 

 toma, I consider insufficient (following the opinion 

 held by the late Dr. Theodore Gill). 



