386 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



ACIPENSERIDiE. 

 Genus ACIPENSER Linnseus. 



106. Acipenser sturio Linn. — Sturgeon. 



A large skin found in the harbor near Cape Lookout. 



CEPHALOPTERIDiE. 

 Genus CERATOPTERA Miiller & Henle. ' 



107. Ceratoptera vampirus (Mitch.) Gill. — Devil-fish. 



Fishermen state that they are occasionally found in the harbor. 



M YLIOB ATIDiE . 

 Genus AETOBATIS Miiller & Henle. 



108. Aetobatis narinari Miill. & Henle. 

 One large specimen seen. 



Genus MYLIOBATIS Dumeril. 



109. Myliobatis fremenvillei (Lcs.) Storer. 

 Tail of one specimen observed. 



DASYBATIDiE. 



(Trygonidce Gill, op. cit.) 



Genus DASYBATIS Rafinesque (fide Gill). 



(Trggon Gill, op. cit.) 



110. Dasybatia centrums (Mitcli.) Gill, MSS. — Sting Bag ; Stingaree. 

 Very common. 



Genus PTEROPLATEA Miiller & Henle. 



111. ?Pteroplatea maclura (Le Sueur) & H. — Skate, 



Several specimens about one foot long, the young of some broad species. 

 They do not answer Le Sueur's account of the present species, and there 

 is no trace of a caudal spine, which on a Sting Ray of the same size is 

 fully developed. If not the young of Ptcroplatea, they will constitute a 

 new genus. 



The following are the characters shown by our specimens: 

 Disk very broad and short, its width nearly twice its length without 

 the tail; tail short, slender and small, its length about one-third that of 

 bhe disk; a dermal fold above, and below; whole disk and tail covered 

 with smooth skin, without spine or roughness of any kind; snout pro- 



