20. PTEEOPLATEA. 487 



a. Adult male, 3| feet broad. Madeira. Presented by J. Y. John- 

 sou, Esq. 

 f>. Young mule. Brazil. From Prof. Kolliker's Collection. 



2. Pteroplatea hirmido. 



Pteroplatea liirundo, Lowe, Pioc. Zool. Soc. 1843, p. 94. 



japonica, Schleg. Faun. Japan. Poiss. p. 309, pi. 141 ; Bleek. Act. 



Sue. Sc. Indo-Neerl. ii. Japan, iv. p. 45. 

 ? Pteroplatea marinorata, Cooper, Proc. Calif. Acad. Nat. Sc. iii. 



5. 112, fig. 25. 



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

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

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



China, Japan, and Madeira ; ? California. 

 a, b-d. Half-grown and young. Japan. Purchased of Mr. Jamrach. 

 e-f. Foetus. Japan. 

 <j. Foetus. China. Presented by J. U. Reeves, Esq. 



8. Pteroplatea maclura. 



Raja maclura, Lesueur, Joitrn. Ac. Nat. Sc. Philad. 1. p. 41. 

 Pastinaca maclura, Dehay, Netv York Faun. Fish. p. 375, pi. 65. 



fi-g. 213. 

 I'teroplatea maclura, MilU. 8f Henle, p. 109j Dumeril, Flastnobr.^. 614. 



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

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

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

 black. 



Western Atlantic. 



a. Half-growtf. Brazil. Purchased of Hr. Brandt. 



b. Young. Texas. Purchased of Hr. Brandt.. 



4. Pteroplatea micrura. 



Raja micrura, Bl. Schn. p. 360. 



pcecilura, Shaw, Gen. Zool. v. 2. p. 291 ; Russell, Fish. Corom. 



pi. 6. 

 Pastinaca kunsul, Cuv. Regne An. 

 Tiygon poecilurus, Benn. in Life of RaJJles, p. 694. 

 Pteroplatea micrura, Mull. 8f Henle, p. 169 ; Cant. Mai. Fish. p. 427 ; 

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

 Beng. 1860, p. 37 ; BumSril, 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 veiy young, without 

 cutaneous folds. Tail with alternate white and brown rings. 

 East-Indian seas 



a. Half-grown : stuffed. Calcutta. 



b-c. Half-grown and young : skins. Pinaug. From Dr. Cantor's 



Collection. 

 d. Young. Pinang. iVom Dr. Cantor's Collection. 



