ADDENDA — 22. MYLIOBATID^ — STOASODON. 879 



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

 row of large spiues ; rest of disk mostly smooth. Lower snrface 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 '''■ Dasihatis 

 Walbanra," read : 



40.— TRYGO]\ Adanson. 



(Adaiisou MSS. ; Geoffrey St. Hilaire, Descr. Egypte Poiss. 1809, 219: type Tryjon 

 lymma St. Hil. = Bala pastinaca L.) 



The name Tnjgon seems to be prior to Dasyatis 3?af. (1810); the 

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

 properly a synonym of Eaia L. The name Trygon is from rfioycb'y, a 

 turtle-dove. ^^Ab alarum expansarum similitudine. Sunt qui columham 

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



The I^orth American species of Trygon should stand as follows : 



61. T. ccntrura. (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. daptorura Jor. «fe Gilb. 

 61. T. tubcrculata (Lac.) Dum. 

 6 J. T. sabina Lo S. 



Page 50. Instead of Aetobatis read: 



41.-STOASODON Cantor. 



{Jetolatix MUIlcr & Henle, Plagiosfoinen, 1841, 179: not of Blaiuvlllc, Bull. See. Phi- 

 lom. IHK), 112 {^^ Myliobatis) : Stoasodon Cantor, Catalogue Malayan Fishes, 

 IBnO, 1416: type Baia narinari Euphr.) 



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

 same name for a diflFerent genus is not allowable. {(Trod<;, arch; oSdh:;, 

 tooth.) Our species should stand as — 

 66. S. narinari (Euphrasen) Cantor. 



Sloasodon laticeps (Gill) J. & G. {AUtobatis laticcps Gill, Ann. Lye. 

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



