486 TRYGU.MDiE. 



/3. A rudimentary dorsal Jin in front of the caudal spine: Tiygonoptera. 



4. Urolophus testaceus. 



Trygonoptera testacea,, Miill. <)■ Henle, p. 174, taf. 50. 



miillcrii, Steindachner, Sitzf/sber. Ak. IViis. Wicn, liii. 18G6, 



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



henlei, Steindachner, I.e. 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. Skiu 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 javanica, Martens, Monatsber. Ak. Wis.:. Berlin, 1804, 

 p. 260. 



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

 broad, and the upper sTirface is mottled with lighter uiul d;ivker 

 spots. The number of papillae at the bottom of the mouth is 

 thirteen. 



Batavia. 



20. PTEKOPLATEA 

 Pteroplatea et Aetoplatea, Miill. ^ Henle. 



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

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

 torals united in front. Nasal valves coalescent into a (juadrangulnr 

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

 imi- or tricuspid. 



Temperate and tropical seas, 



• a. Tail withoiitfin : PteroplAtea * 

 1. Pteroplatea altavela. 



Pastinaca marina kc, Coliinina, Aquat. et Terrestr. anim. observ. 



pp. iv, ii ; Willughh;/, p. 05, tab. C 1. fig. 3. 

 Ilaja pastinaca, var. altavela, L. Syi^t, Nat. i. p. 396. 



altavela, L. ihn. i. p. 1509. 



Trygon altavela, Bonap. Faun. Ital. Pesne. 



Pteroplatea altavela, Midi. SfJlenlc, p. 1(;8; Dnm^ril, Elasmobr.T^.GU. 



caiiariensis, Valenc. in Wchh ^- Berth. lies Canar. Poiss. p. 100, 



pi. 23. fig. 1 ; Ihwieril, I. c. p. 611. 



valenciennii, I>u?neril, 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 ^nd Atlantic. 



* 1. I'teroplatea orebripiinctata, Pefrrs. Mmwfu.Ak. Wif^s. Btr/. 18(>0, p. 70.^ — 

 Ma7,atlan. 



