-!0. PTEUOl'LATKA. 487 



a. Adult male, Sg feet broad. Madeira. Presented by J. Y. John- 



son, Esq. 



b. Young male. Brazil. From Prof. Kolliker's Colloction. 



2. Pteroplatea hirundo. 

 Pteroplatea liiruiulo, Loice, I'roc. Zool. Soc. 184.3, p. 91. 



japonica, Schlcg. Faun. Japon. Poiss. p. 30!), pi. 141 ; Bleek. Act. 



Sue. So. Indo-Neerl. ii. Jcqtan, iv. p. 45. 

 ? Pteroplatea marmorata, Cooper, Proc. Calif. Acad. Nat. Sc. ill. 



p. 112, fig. 25. -^ 



Disk more than twice as broad as long. Spiracle without ten- 

 tacle. Tail only hall' as long as the disk, with an indistinct cuta- 

 neous fold below, and with alternate whitish and black lings. 



China, Japan, and Madeira ; ? California. 



(f, h-d. Half-grown and young. Japan. Piirchased of Mr. Jami-ach. 



e-f. Foetus. Japan. 



[/. Foetus. China. Presented by J. R. Reeves, Esq. 



3. Pteroplatea maclura. 



Raja maclura, Lesueur, Joimi. Ac. Nat. Sc. Pkilad. i. p. 41. 

 Pastiuaca maclura, Dakai/, New York Faun. Fish. p. 375, pi. 65. 



tig. 213. 

 Pteroplatea maclura, Midi. S/-IIetde,'p. 1G9; Dumeril,Flasmobr.'p. 61i. 



Disk not more than twice as broad as long. Sjjiracle without 

 tentacle. Length of the tail less than one-half of that of tlie disk ; 

 it has an indistinct cutaneous fold below, and is scmiaunulated with 

 black. 



Western Atlantic. 



a. Half-grown. Bi'azil. Purchased of Hr. Brandt. 

 6. Y''oung. Texas. Purchased of Hr. Brandt. 



4. Pteroplatea micnira. 



Raja micrura, Bl. Schn. p. 3G0. 



poecilura, Shaw, Gen. Zool. v. 2. p. 291 ; liassell. Fish. Corom. 



pi. 6. 

 Pastinaca kunsul, Ctiv. Regne An. 

 Trygon pcecilurus, Benn. in Life of Pdjjflcs, p. 094. 

 Pteroplatea micrura, Midi. S<- Hade, p. 1G0 ; Cant. Mai Fish. p. 427 ; 



Bleek. Verh. Bat. Gen. xxiv. Plag. p. 76; Blijth, Jouni. As. Soc. 



Beng. 1800, p. 37 ; Bumeril, Elasmobr. p. 613 ; Day, Fish. Malab. 



p. 278. 



Spii'acle without tentacle. Tail rather longer than the disk in 

 half-grown examples, but rather shorter in very young, without 

 cutaneous folds. Tail with alteniato white and brown rings. 



East-Indian seas. 



a. Half-grown : stuffed. Calcutta. 



h-c. Half-grown and young : skins. Pinang. From Dr. Cantor's 



Collection. 

 (/. Y^oung. Pinang. From Dr. Cantoi''s Collection. 



