486 TKYUONIDJi. 



j3. A rttdimentary dorMilJin in front of the caudal sjrine: Ti-ygonoptera. 



4. Urolophus testacexis. 

 Trygonoptera testacea, MUll, Sf Ilenle, p. 174, taf. 56. 



miillerii, Steindaclmer. Sitzgsbcr. Ak. Wks. Wieti, liii. 1866, 



p. 479, taf. 6. f. 5 (young). 



henlei, Stemdachner, I. c. fig. 4 (half-grown). 



australis, Steindachner, I. c. p. 480, taf. 7. 



Disk rather broader than long, the anterior margins meeting at a 

 very obtuse angle ; snout not projecting. Skin entirely smooth. 

 Tail shorter than the disk in adult examples, rather longer in im- 

 mature. Nasal valve fringed ; six short papillae at the bottom of 

 the mouth. Coloration uniform. 



Australian seas. 

 a, b, c-d. Adult and half-grown. Sydney. 

 e. Half-grown. Cape Upstart. Presented by J. B. Jukes, Esq. 

 f-g. Half-grown. New Holland. From the Haslar Collection. 



5. Urolophus javanicus. 



Trygonoptera javauica. Martens, Monatshcr. Ak. Wiss. Berlin, 1864, 

 p. 260. 

 Allied to the Australian species. The body is a little longer than 

 broad, and the upper surface is mottled with lighter and darker 

 spots. The number of papiUas at the bottom of the month is 

 thirteen. 

 Batavia. 



20. PTEROPLATEA 

 Pteroplatea et Aetoplatea, Midi. ^ Henle. 

 Body at least twice as broad as long ; tail very short and thin, 

 without or with a rudimentary fin, and with a serrated spine. Pec- 

 torals united in front. Nasal valves coalescent into a quadrangular 

 flap. No papillae at the bottom of the mouth. Teeth very small, 

 nni- or tricuspid. 



Temperate and tropical seas. 



a. Tail wifhoidjin : Pteroplatea *. 

 1. Pteroplatea altavela. 

 Pastiuaca marina &c., Columna, Aqtiat. et Terrestr. anim. observ. 



pp. iv, ii; Willughby, p. 6o, tab. C 1. fig. 3. 

 Raja pastinaca, var. altavela, L. Si/.tt. Nat. i. p. 396. 



altavela, L. Gin. i. p. 1500. 



Trygon altavela, Bonap. Faun. Ital. Pcsce. 



Pteroplatea altavela, i^«W. Sj- Ilenle, t^. 168; Dumiril, Elasynobr.^.QW. 



canariensis, Valenc. in Webb Sf Berth. lies Cunar. Poiss. p. 100, 



; pi. 23. fig. 1 ; Dmneril, I. e. p. 611. 



valencieunii, IJunieril, I. c. p. 612. 



A tentacle behind the spiracle. Tail not quite half as long as the 

 disk, with a narrow cutaneous fold above and below. 

 Mediterranean and Atlantic. 



* 1. Pteroplatea crebripunctata, Peters, Monats.Ak. Wiss. Berl. 1869, p. 703. — 

 Mazatlan. 



