23. RHINOPTERA. 493 



e. Adult. Sumatra. From the Collection of Sir S. Raffles. 



/. Half-grown : stuffed. India. Presented by T. C. J.erdon, Esq. 



g. Half-grown. Seychelles. Presented by Lieut.-Col. Playfair. — 

 Lower teeth angularly bent. 



h. Half-grown. Seychelles. From the Collection of Prof. Perceval 

 Wright. — Lower teeth nearly straight; otherwise perfectly iden- 

 tical with the preceding specimen. 



i. Half-grown. From the Collection of the Zoological Society. 



I: Adult : stuffed. 



1. Tail of a very large example, with four spines. 



m. Tail of a very large example, with five sjnnes. Seychelles. Pre- 

 sented by S. Ward, Esq. 



n. Jaws of a very large example. Seychelles. Presented by S. 

 Ward, Esq. 



o-p. Dental laminae. 



23. RHINOPTERA*. 



Rhinoptera, KiiM. 



Rhinoptera, Mylorhina et Micromesus, Gill, Ami. Li/c. Nat. Hist. New 

 York, viii. p. L3C.. 



Head free from the pectoral fin, but provided with a pair of rayed 

 appendages situated at the lower side of the snout. Nasal valves 

 confluent into a broad flap with free margin. Teeth broad, flat, 

 tessellated, in five or more series, the middle being the broadest, and 

 the others decreasing in width outwards. Tail very slender, with a 

 doi-sal fin before the serrated spine. 



Tropical and subtropical seas. 



1. Rhinoptera marginata. 



Rhinoptera margiuata, Cur. Regtie An. ; Midi. ^- Heiilc, p. 181 ; Dii- 



vi^nl, miasmobr. p. 645. 

 M^liobatis luarginata, Geoffr. St.-Hilaire, Descr. Eg. Poias. p. 220, 



pi. 25. figs, .'i & 4. 



Nine rows of teeth in each jaw, those of the middle series thrice as 

 broad as long. The dorsal fin commences above the end of the root 

 of the ventrals. Tail not quite twice as long as the body. 



Mediterranean. 

 a. From Prof. Kolliker's Collection. 



2. Rhinoptera jussieui. 



Jmsieu, Mem. Ac. Sc. 172.1, p. 75, pi. 4. fig. 12 ; Otccn, Odonfoi/r. 



pi. 2o. fig. 2. 

 ^Ivliobatis iussicui, Cur. licqnc An. 

 RiiiuoptLTabrasilionsi?, Miill. Ahhimll. Ah. Wi^K. JBerl. IS.^G, p. 2.37, 



pi. 1). fig. 12 ; Miill. S,- Ilenh; p. 182 ; Dumeril, Elasmnbr. p. 646. 

 Zygobatis jussieui, Affci.'ss. Poisis. /-W. iii. pp. 7P, .328, pi. 1). fig. 8. 



Nine rows of teeth in each jaw, those of the middle .scries being 



* 1. Rhinoptpr.i peli, Bleek. Nat. Verli. Holl. Mmlsch. ]\',t. Haarlem. \dm, 

 Gninee. p. L"^, tab. 1. — West Afrii'ii. 



