222 SCLEKODERMI. 



gitudinal grooves. Anterior dorsal and anal rays and caudal lobes 

 lut slightly produced. Each scale on the tail and lower half of the 

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

 whitish margins. 

 Mauritius. 



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



Zoological Society. 



b. Adult : stutfed. Mauritius. From Dr. Janvier's Collection. 



c. Adult: stuffed. 



15. Balistes rivulatus. 



mippell, N. W. Fische, p. 50, 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 whitish margins. (Riipp.). 



Djedda. 



16. Balistes fascns. 



Baliste grande-tache, Lac4p. i. p. 378. 

 Balistes fuscus, Bl. Schn. p. 471. 



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



- — caerulescens, Riipp. Atl. Fisch. p. 32, taf. 7. fig. 2. 



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



chrysospilus, Bleeh. Nat. Tyds. Ned. hid. 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 giU-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 with 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 : stufied. Eed Sea. From Dr. Itiiiipell's Collection. 

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

 Playf air's Collection. 



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



d. Adult. From Dr. Blocker's Collection. — Type of B. chrysospihis. 



