222 SCLEBODERMI. 



gitudinal grooves. Anterior dorsal and anal rays and caudal lobes 

 but slightly j^roduced. Each scale on the tail and lower half of the 

 trunk with a pearl-coloured spot. Dorsal, anal, and caudal fins with 

 wliitish margins. 



Mauritius. 

 a. Type of the species. Mauritius. From the Collection of the 



Zoological Society. 

 6. Adult : stuffed. Mauritius. From Dr. .Janvier's Collection. 

 c. Adult : stuffed. 



15. Balistes rivulatus. 



JUippell, N. TV. Fische, p. oG, taf. 16. fig. 2. 

 D. 3 I 26. A. 23. 



Tail without any spines or tubercles. Six naked stripes on the 

 cheek. Dorsal and anal fins somewhat elevated, with the profile 

 rounded ; caudal fin with the lobes slightly produced. Yellowish, 

 with bluish stripes, oblique on the head and longitudinal on the body ; 

 a band between the eyes, a semicircular spot on the base of the first 

 and second dorsal fins, the first dorsal fin, and a ring round the tail 

 black. Fins with blue spots and wliitish margins, {lliipp.). 



Djedda. 



10. Balistes fuscus. 



Baliste graude-tache, Lacip. i. p. 378. 

 Balistes fuscus, Bl. Schn. p. 471. 



signatus, Shaw, Zool. v. pt. 2. p. 416. 



Cffirulescens, Riipp. Atl. Fisch. p. 32, taf. 7. fig. 2. 



reticulatus, Hollard, Ann. Sc. Nat. i. 1854, p. 312. 



chrysospilus, Sleek. Nat. Tijds. Ned. Ind. v. p. 94, or Atlas 



Ichth. Balist. p. Ill, pi. 11. fig. 3. 



D. 3 I 25. A. 23. L. lat. 43-55. 



Tail without spines or tubercles. From twenty-seven to thirty- 

 one scales in a transverse series running from the origin of the soft 

 dorsal fin to the vent. A patch of enlarged osseous plates behind 

 the gill-opening. The greater portion of the cheek is naked, longi- 

 tudinally traversed by five or six lines of small tubercles. Dorsal 

 and anal fins elevated ; caudal lobes produced into long filaments (in 

 the adult). Ventral spine short, moveable. Vertical fins with a 

 white margin. Body mth brownish vermiculated or reticulated 

 lines ; the lines form sometimes a meshwork, enclosing round yellow 

 spots, smaller than the eye. Very old examples uniform brown, 

 with white margins to the fins. 



Indian Ocean and archipelago. 



a. Young : stuffed. Red Sea. From Dr. Riippell's Collection. 

 6. Nineteen inches long : stuffed. Zanzibar. From Lieut.-Col. 

 Playfair's Collection. 



c. Adult : stuffed. Mam-itius. From Dr. Janvier's Collection. 



d. Adult. From Dr. Blocker's Collection. — Type of B. chrysospih(S. 



