382 ACANTHOPTERYGII. 



SYNOPSIS OF SPECIES. 



1. Pomacentrus trilineatus, D. if, A. -^, L. 1. 28, L. tr. 3/9. One or two Hue spots on eact scale. 

 Three to five blue vertical lines on tlie forehead. A dark spot on opercles, another across free portion of the 

 taU, a third on the first third of the soft dorsal in the young. Red Sea to the Malay Archipelago and 



^^°'°' 2. Pomacentrus tripmculatus, D. yJ l, A. xs^tt, L- 1- 27-28, L. tr. 4/9. Greenish yellow, with the scales 

 on the head spotted with bluish : three black blotches on the back, descending on to the sides. Two blue lines 

 between the eyes, and a light band over the nape. Andamans to the Malay Archipelago. 



3. Pomaoentms Ufasoiatus, D. if. ^- tt-t*. L. 1. 28, L. tr. 3/9. Yellowish, with two black bands 

 descending from the back to the sides. Andamans and Malay Archipelago. 



4. Pomac&ntrus BoMkcmensis, D. if, A. „?tt. L- 1- 26-28, L. tr. 3/9. Two blue Knes along forehead, two 

 more through the eye. Scales on body with blue spots. A black white-edged spot from second to sixth dorsal 

 rays, and usually another across the free portion of the tail. Andamans to the Malay Archipelago. 



5. Pomacentrus UttoraUs, D. if, A. ^, L. I. 27, L. tr. 3|/9. Olive, with blue spots on the scales. A 

 black spot at commencement of the lateral-line, another at base of pectoral fin, and a third across the free 

 portion of the tail. Andamans to Australia. 



6. Pomacentrus Jerdoni, D. if; A. ■^, L. 1. 34, L. tr. 6/11. Olivaceous, blue spots on gill-covers and also 

 on scales of sides. A black spot at base of pectoral. Madras. 



7. Pomacentrus albofasciatus, D. i ^ », A. Ys-Ti> L. 1. 26, L. tr. 3/9. Olive, bluish spots on head, a broad 

 vertical yellowish band below last dorsal spines, a round black spot edged with white at base of pectoral. 

 Andamans to the Malay Archipelago. 



8. Pomacentrus pundatus, D. i|:i|, A. y^?T-f, L. 1. 27, L. tr. 3J/10. Bluish dots on head and body : a 

 black spot edged anteriorly with white across the base of the last sis dorsal rays. Eed Sea to the Malay 

 Archipelago. 



9. Pomacentrus lahiatus, D. xr-Vs. -^^ T5--T*. L. 1. 28, L. tr. 3|/10^. Lips veiy thick. Brownish, with 

 dark fins. Blue spots on some of the scales of the head and body. Aiidamans and Nicobars. 



1. Pomacentrus trilineatus. 



(Ehrenb.) Cut. and Val. v, p. 428 ; Giinther, Catal. iv, p. 25 ; Klunz. Fische Roth. Meer. Verh. z. b. Ges. 

 Wien, 1871, p. 522. 



Pomacentrus hiocellatus, Riipp. N. W. Fische, p. 127, t. xxxi, f. 3 (young). 



B. V, D. if, P. 17, V. 1/5, A. A, C. 17, L, 1. 28, L, tr. 3/9. 



Length of head from 4 to 4|, of caudal 5i, height of body 2f in the total length. JE/j/es-^-diameter 2f in 

 length of head, 3/4 of a diameter from end of snout, and 1 apart. The greatest depth of the preorbital equals 

 half a diameter of the eye. Suborbital ring of bones below the eye serrated, and twO strong denticulations on 

 the first bone. Two opercular spines. Colours — olivaceous : caudal yeUow : each scale with one or two blue 

 spots : three to five blue lines on the forehead, the outer of which are continued on to the nape, and sometimes 

 along the base of the dorsal fin. A dark round spot on the opercle : a black spot margined with blue across 

 the free portion of the tail. The immature have a similar spot on the anterior third of the soft dorsal. 



Sabitat. — Red Sea, East coast of Africa, Andamans, Mcobars, to the Malay Archipelago and beyond. 



2. Pomacentrus trimaculatus, Plate LXXX, fig. 10. 



Cuv. and Val. v, p. 441:; Schlegel, Overz. Amph. in Yerh. Nat. Ges. Ned. Ind. Overz. Bezitt, p. 20, t. iv, 

 f. 4; Bleeker, Batav, p., 481 ; Giinther, Catal. iv, p. 19 (not Riippell, Atl. Fische, p. 39, t. vui, f. 3). 



B. V, D. ji.^, P. 17, V. 1/5, A. T3?TT, C. 17, L. 1. 27-28, L. tr. 4/9. 



Length of head 4| to 4f , of caudal 4^ to 4f , height of body 3 to 3j in the total length. Eyes — diameter 

 3 to 3j in length of head, 1 diameter from end of snout, and also apart. Preorbital entire, the suborbital ring 

 of bones below the eye serrated, as is also the vertical edge of the preopercle. Greatest depth of the preorbital 

 , equals rather above 1/2 the diameter of the eye. Fins — the posterior dorsal spines are slightly longer than the 

 middle ones : caudal emarginate. Scales — a row of small ones along the bases of dorsal and anal fins. Colours 

 — greenish-yeUow, with three black blotches over the back, the first passing over the head from the origin 

 of the dorsal fin to the snout : the second from between the seventh and tenth dorsal spines descends 

 to below the lateral-hue : the third from the middle of the soft dorsal also to below the lateral-liae. 

 A light band passes over the nape, and two narrow blue bands go from one orbit to the other, these divide 

 the anterior blotch into three portions. A light blue line along the suborbital ring of bones and spots on 

 the scales covering the cheeks, and at the bases of dorsal and anal fins. Dorsal and caudal with a narrow dark 

 edge, anal with a broad dark outer margin, having one or two narrow blue lines along its base. 



Habitat. — Andamans to the Malay Archipelago and beyond. The specimen figured (life-size) is from 

 the Andamans, where the species is not uncommon. 



