232 SCIEEODERMI. 



p. Half-grown. East-Indian archipelago. From Dr. Bleeker's 

 Collection. 



q. Young. East-Indian archipelago. From Dr. Bleeker's Collec- 

 tion. — Ty]3e of M. melanuroptenis. 



Var. I. Several more or less distinct light longitudinal bands along 

 the tail. Head with undulated bluish streaks. Body sometimes 

 with scattered light round spots, each with a dark speck in the 

 centre. 



r-s. Half-grown. St. Croix. Purchased of Mr. Stevens. 



t-v. Half-grown : skins. Jamaica. Purchased of Mr. Parnell. 



w. HaK-grown. Cuba. From the Collection of the Zoological 



Society. 

 x-y, z-a. Half-grown. Bahia. From Dr. Wucherer's Collection. 

 /3-y. Half-grown : stuffed. Bahia. 

 S, e-<f. Half-grown. "West Indies. 

 ri-i. Half-grown : stuffed. West Indies. 

 K. Half-grown. From the Haslar Collection. 



Var. e. Young examples of uniform coloration, the sides and 

 abdomen shining silveiy. 



A. Young. St. Croix. Purchased of Mr, Stevens. 



jj. Young. Cape of Good Hope. 



i-i'. Young. China or Borneo? Presented by Vice- Admiral Sir 



E. Belcher. 

 V, V, p, s, T, Several young examples. 



2. Monacanthus scopas. 



Guaperva hystrix, Willughby, tab. J. 21. 

 Balistes uo. 5, Artedi, Genera, p. 54 ; Si/non. p. >i2. 

 Gapriscus no. 5, Klein, Pise. Miss. iii. p. 25. 

 Baliste hei-iss^, Laeep. i. p. 389, pi. 18. fig. 3. 

 Monacantbus scopas, Cuv. Regne An. 



hystrix, Burton, Proe. Zoul. Soe. 1834, p. 121. 



(Anianses) hystrix, Grmj, hid. Zool. ; Burton, Pruc. Zool. Soc. 



ii. p. 121 ; Bleek. Nat. Ti/ds. Ned. Ind. v. p. 351. 

 Amauses scopas, Bleek. Atl. Ichth. Balist. p. 135, pi. 14. fig. 3 ; Kner, 



Sitzgsber. Ak. Wiss. Wien, 186G, Uv. p. 390. 



D. 27. A. 24. 



Scales exceedingly small, rough ; only those on the free portion 

 of the tail of larger size. On each side of the tail, opposite to the 

 dorsal and anal fins, a patch of spines ; in the male they are very 

 long, straight, and stiff, nearly as long as the dorsal spine, and 

 directed backwards ; there are about ten of these spines ; in the 

 female it is a patch of much shorter and thinner, more or less erect 

 spines, like a brush. Body elevated, its depth being contained once 

 and four-fifths in the total length (without caudal). Snout com- 

 pi-essed, rather obtuse, with the upper profile scarcely concave. 

 Dorsal spine strong, without spinelets, as long as the head, situated 

 above the orbit. Caudal fin rounded, short. Ventral spine veiy 



