3. TETRODON, 303 



fin with small ocelli, confluent into subvertical bands in fro;it and 

 below. Caudal fin entirely immaculate. 



a. Type of the species. Ambojma. From Dr. Bleeker's Collection. 



Yar. natalensis. The sides of the head in front of the pectoral fin 

 ornamented as the body ; cheeks with short horizontal and vertical 

 bluish lines. Basal half of the caudal fin spotted like the body. 



b. Fine specimen. Port Natal. From Mr. Th. Ayres's Collection. 



53. Tetrodon rostratus. 



Tetrodon rostratus, Block, Ausl. Fisch. ii. p. 8, pi. 146, fig. 2 ; Lacip. 



i. p. 502; Bl. Schn. -p. 505. 

 capistratus, Lowe, Proc. Zool. Soc. 1839, p. 90. 



No dorsal spot. Caudal Jin with the upper and lower margins 

 black, othervrise immaculate. An irregular brownish band from above 

 the pectoral to the upper caudal margin ; in large examples this 

 band is broken up into small spots and undulated lines of a bluish 

 colour. An incomplete bluish median abdominal band. Back above 

 the band immaculate. Sides with bluish ocelli. The upper profile 

 of the snout slightly concave. Spines on the abdomen only, but not 

 very small, and two-rooted. 



Madeira ; Cape Verde Islands. 



a. Adult. 



b. Half-grown. Funchal. Presented by the Rev. R. T. Lowe. 



c. Half-grown : in bad state. Madeira. Presented by J. Y. John- 



son, Esq. 

 d-e. Half-grown. Porto Prayo. Presented by the Rev. R. T. 

 Lowe. 



This is evidently T. rostratus of Bloch ; he has also indicated the 

 ■blackish margins of the caudal fin. 



54. Tetrodon caudacinctns. 



Prilonotus vel Anchisomus caudacinctus, Richards. Voy, Herald, Fish. 

 p. 1G2, pi. 30. figs. 1-3. 



Described from a single example in bad condition. 



A slight trace of a dark spot exists on the back belo-^ the first 

 dorsal rays. Light brown above, whitish below. Some pale dots 

 on the posterior part of the back run into rows near the caudal. The 

 under half of the tail and chin are crossed transversely by chestnut- 

 coloured bars ; three of the same hue radiate with a curve from the 

 eye towards the nostrils, and four from the eye curve over the 

 temples. There are also some markings of a similar iiut on the 

 outer rays of the caudal, and a single purplish line. Tail spineless. 

 (liichards.) 



Hab. ? 



Tetrodon oriiatus. Pocy, Repert. Fis.-nat. Cuba, ii. pp. 244, 433, 

 seems to be most closely allied to the preceding species. It has the 



