PYRAMIDAL TRUNK-FISH. 



425 



agons marked with numerous and very small tuber- 

 cles : on the top of the head two very strong spines 

 pointing forwards ; and from the hind part of the 

 abdomen, immediately before the anal fm, two more 

 spines, pointing backwards : colour of the mailed 

 part subviolaceous brown, with darker streaks ir- 

 regularly dispersed over the whole : naked part of 

 the body near the tail yellowish brown, marked 

 with deep brown spots : fins and tail yellowish 

 brown. Native of the Indian and American seas. 



PYRAMIDAL TRUNK-FISH. 



Ostracion Tun-itus. 0. suhtetragonus, spinis front alihus duahus, 



dorso pyramidato, abdomine utrinque spinis quatuor, 

 Subquadrangular-bodied Trunk-Fish, with two frontal spines, 



pyramidal back, and four spines on each side the abdomen. 

 Ostracion turritus. 0. subtetragonus, superciliis dorsoque spinis 



solitariis, abdomine utrinque quatuor. Lin. Gmel. Forsk, 



Arab, 



Ostracion quadrangularis, processu magno in dorso. Block, t, 

 136. 



Length ten or twelve inches : shape squarish, 

 the back rising into a pyramidal protuberance, ter- 

 minated by an extremely strong, short, sharp- 

 pointed and striated spme, curving slightlj?^ back- 

 wards : above the eyes a pair of short and sharp 

 spines : on each side the abdomen four strong, 

 sharp, short, striated spines, curving slightly back- 

 wards : mail marked into numerous triangular 

 spaces, the hexagonal or primary divisions being- 

 subdivided by radii from the centre to the sides : 



