7. osTRAcroN. 259 



Crayracion, sp., Klein, Pise. Miss. iii. p. 20. no. 17. 



Ostracion tundtus, Forsk. Dcser. An. p. 75. no. 113 ; Bl. Ausl. Fisch. 



i. p. 11."}, taf. im ; in. 8chn. p. 500 ; Lctcep. i. p. 470;Iileek. Verh. 



Bat. Gen. xxiv. BaUst. p. 81, and Act. Soc. Sc. Indo-Ncerl, vii. 



Japan, vi. p. 1;5 ; HuUurd, Ann. Sc. Nat. 1857, vii. p. 156. 

 Lactophrys camelinus, Bekay, New York Faun. Fish. p. 341, pi. 58. 



fig. 190. 

 Ostracion (Tetrosomns) tiin-itus, Bleek. Atl. Iclith. Ostrac. p. 31, pi. 3. 



%.3. 



Carapace three-ridged, the dorsal ridge passing into a very large, 

 compressed, elevated, triangular spine. Each ventral ridge with 

 four small flat spines pointing backwards. Supraorbital edge with 

 a small spine pointing backwards and outwards. The carapace forms 

 a broad continuous bridge across the back of the tail. Interorbital 

 space concave. Caudal fin rounded. During life a bluish spot in 

 the centre of each scute. 



Indian Ocean and archipelago. (?? New York.) 

 a. Adult : skin. Zanzibar. From Lieut.-Col. Playfair's Collection. 

 h. Adult (9 inches) : skin. Persian Gulf. Presented by Dr. Leith. 

 c-d. Adult and half-grown. East-Indian archipelago. 

 e. Young. Borneo. Presented by Vice-Admiral Sir E. Belcher. 

 f-g. Half-grown : skins. India. Purchased of Mr. Warwick. 

 \ Adult. 



6. Ostracion concatenatus. 



Ostracion concatenatus, Bl. taf. 131 (adult) ; Bl. Sclm. p. 498 ; Lacep. 



i. p. 454 ; Mullurd, Ann. Sc. Nat. 1857, vii. p. 155. 



stellifer, Bf. Schn. p. 499, pi. 98 (young). 



bicuspis, Bbnnenbach, Abbi/d. tat 58; Smith, HI. Zool. S. Afr. 



Pise. pi. 18. 



Very closely allied to, and probably identical with, 0. gihhosus. 



Carapace three-ridged, forming a broad continuous bridge across 

 the back of the tail. Dorsal ridge with two compressed small spines 

 placed close together ; each ventral ridge with two similar spmcs re- 

 mote from each other. Supraorbital edge with a very smaU or 

 minute spine, pointing backwards and outwards ; it is frequently 

 absent, sometimes double. All these spines become less prominent 

 with age, and only traces of them can be discovered in adult ex- 

 amples (8-10 inches). Interorbital space concave. Adult examples 

 with some horizontal dark stripes on the cheek. 



Cape of Good Hope ; Chinese Seas ; ? Australia. 



a-d. Adult (10 inches) and half-grown : skins. Cape of Good 



Hope. 

 €. Very young. Zanzibar. From Dr. Kirk's Collection. 

 f-g. Young. ? Siam. Purchased of Mr. Jamrach. 

 h. Adult : carapace. New South Wales. From the Fort-Pitt 



Collection. 

 /. A great number of half-grown and young examples : skins. 



Chinese Sea. 



s2 



