3. nniNOBAiTs. 447 



a median scries of very small tubercles. Young examples with a 

 white snout. 



Mediterranean ; Atlantic ; Indian Ocean. 



a. Female : stuffed, 40 inches long. Cape of Good Hope. 

 h. Half-grown male. Port Natal. Purchased of Mr. Aj-res. 



c. Adult male. Zanzibar. Presented by Lieut.-Col. Playfair. 



d. Adult male; stuffed. Zanzibar. Presented by Lieut.-Col. Play- 



fair. 



11. Rhino batus blochii. 



Rhinobatus (Syrrhina) blocliii, Miii'L ^- Ilenlv, p. 115, pi. 37. fig. 1 ; 

 Dumeril, Elasmohr. p. 488. 



The anterior nasal valve is continued towai'ds the median line by 

 a fold which nearly meets that of the other side. Snout rather short, 

 the distance between the external angles of the nostrils being more 

 than one-half of the distance of the mouth from the end of the snout. 

 Cleft of the mouth straight, longer than the nostril. The upper 

 rostral ridges distant from each other behind, and convergent in 

 front. Back finely granular, with very distinct tubercles along the 

 median line. Young examples with a white snout, aud with scattered 

 round whitish spots. 



Capo of Good Hope. 



a-h. Females, stuffed, 3 feet long. Cape of Good Hope, 

 c. Young male. Cape of Good Hope. 



12. Rhiaobatus brevirostris. 



Rhinobatus (Syi'rhina) brevirostris, MiiU. t^- //cw/c, p. 1 14, tab. 3G ; 

 Casteln. An. Am. Sud, Poiss. p. 100 ; Dumeril, Elasmohr. p. 489. 



The anterior nasal valve is continued towards the median line, 

 nearly meeting tliat of the other side ; it partly covers the inner 

 angle of the nostril. Snout short, the distance between the external 

 angles of the nostiils being more than one-half of the distance of the 

 mouth from the end of the snout. Cleft of the mouth straight, 

 longer than the nostril. The upper rostral ridges convergent in 

 front. Dorsal parts of the trunk with numerous small tubercles 

 or prickles. A series of rather large and obtuse tubercles along the 

 median line of the back ; two short rows of similar tubercles on 

 each shoulder. 



Brazil. 



a. Stuffed: female, 19 inches long. — One of the typical examples 

 (see Midi. &, Henle, p. 115 ; named " PlatyrliiiHt sinensis " in 

 Gray's Cliondropter. p. 98). 



h. Fine specimen. Brazil. Presented by Prof. KiiUiker. 



4. TRYGONORHINA. 



Tiygonorhina, MiUl. Sf Ilcnle. 

 This genus differs from Rhinnhatus oidv in the form of the ante- 



