ADDENDA 22. MYLIOBATIDyE STOASODON. 879 



tail with a median row of 22 to 29 large spines; tail with a marginal 

 row of large spines ; rest of disk mostly smooth. Lower surface smooth, 

 except an elliptical area below tip of snout. L. 3 feet. Unalashka, 



Alaska. (Bean.) 



(Bean, Proc. U. S. Nat. Mus. iv, 157, 1881.) 



On pages 47 and 65, instead of "Dasyatis Eafinesque" or "Dasibath 

 Walbauin," read : 



4O. TRYGON Adanson. 



(Adanson MSS. ; Gooffroy St. Hilaire, Descr. Egypte P,oiss. 1809. 219: type Trygon 

 lymma St. Hil. = Raia pastinaca L.) 



The name Trygon seems to be prior to Dasyatis Eaf. (1810); the 

 earlier Dasybatus of Walbaum included all the rays, and is therefore 

 properly a synonym of Raia L. The name Trygon is from rpuyw-^ a 

 turtle-dove. "Ab alarum expansarum similitudine. Sunt qui columbam 

 marinam appellant" (Eondelet, de Piscibus, 332, 1554). 



The North American species of Trygon should stand as follows: 



61. T. centrura (Mitch.) Linsley. 

 61 (6). T. hastata (Dekay) Storer. 



62. T. sayi (Le Sueur) M. & H. 



The specimen described on page 48 as "Dasyatis sayi" is the young 

 of T. sabina. 



63. T. diptcrura Jor. & Gilb. 



64. T. tuberculata (Lac.) Dum. 

 6 J. T. sabina Le S. 



Page 50. Instead of Aetobatis read: 



41. STOASODON Cantor. 



(Aetobatis Miiller & Henle, Plagiostomen, 1841, 179: not of Blniuville, Bull. Soc. Plii- 

 lora. 181(5, 112 ( Myliobatis') : Stoasodon Cantor, Catalogue Malayan Fishes, 

 1850, 1416: type Raia naririari Enphr.) 



As the type of Aetobatis Blalnv. was Raia aquila L., the use of the 

 same name for a different genus is not allowable. (<rrwd?, arch; o'^wu?, 

 tooth.) Our species should stand as 

 66. S. narinari (Euphrasen) Cantor. 



Stoasodon laticeps (Gill) J. & G. (Aetobatis Jaticeps Gill, Ann. Lye. 

 Nat. Hist. N. Y. 1865, 137 = Aetobatis latirostris Gunther, Fish. Centr. 



