3. TETHODON. 275 



Gastrophysus luuaris, Miill. Wie(/ni. Arch. ix. p. 330. 

 Promecocephalu3 luuaris, Bibr. Rev. Zool. 1855, p, 279. 

 Tetrodon spadiceus, Richards. Voy. Sulph. Ichth. p. 123, pi. 58. figs. 

 4& 5; Bleek. Atl. Ichth. Gijmnod. p. 64, pi. 3. fig. 1. 



The back is either eutircly covered with small spines (lunaris), 

 or anteriorly only {spadiceus) ; abdomen covered with similar spines; 

 Snout, sides, and tail entirely naked. The length of the head is 

 equal to or a little less than its distance from the dorsal fin. Caudal 

 fin emarginate. Uniform brownish above, sides silvery, abdomen 

 white. Rai'ely a large brown band across the back. 



Indian Ocean and archipelago ; Pacific ; coast of Brazil. 



Var. a. lunuris. Back entirely covered with spines ; the length of 

 the head equals its distance from the dorsal fin. 



a. Young : stuffed. Cape Seas. Presented by Sir A. Smith. 

 h. Young. Zanzibar. From Lieut. -Col. Playfair's Collection. 



c. Adult: skin. Pinang. From Dr. Cantor's Collection. 



d. Half-grown. Sarawak. Presented by the Marquis J. Doria. 



e. Adult (8 inches). East-Indian archipelago. From Dr. Bleeker's 



Collection. 

 /. Young. China. Presented by J. R. Reeves, Esq. 

 g. Half- grown. 



Var. /3. Interorbital space and neck covered with spines ; the 

 length of the head equals its distance from the dorsal fin. A broad 

 dark band across the middle of the back. 



h. Eight and a half inches long. Brazil. Presented by J. P. G. 

 Smith, Esq. 



Var. y. spadiceus (Rich.). Interorbital space and fore part of the 

 back covered with spines ; the length of the head equals its distance 

 from the dorsal fin. Back without cross band. 



i-k. Young. Vizagapatam. Presented by Captain Mitchell. 

 /. Young. Coast of Malabar. Presented by Surgeon F. Day. 

 m-o. Half-grown. Borneo. Purchased of Hr. Frank. 

 p. Half-grown. East-Indian archipelago. From the Collection of 



Dr. van Lidth de Jeude. 

 q. Adult. Philippine Islands. Purchased of Mr. Cuming. . 

 r. Adult. China. Presented by -I. R. Reeves, Esq. — Tj^pe of 7'. 



spadiceus. 

 s. Half- grown. 



Var. 3. spadiceus (Blkr.). Like var. y, but the length of the head 

 IS less than its distance from the dorsal fin. 



t. Ten inches long. East-Indian archipelago. From Dr. Bleeker's 



Collection. 

 u. Eleven inches long. Japan. Purchased of Mr. Jamrach, 



