\ 



5. POlIACENTia'S. 25 



the lateral teeth being very small. Prasorbital very narrow and not 

 serrated ; prajoperenluui finely serrated ; operculum with two spines. 

 The scales on the iijjper side of the head do not advance to the front 

 margin of the orbit. Of the dorsal spines the fourth, fifth and sixth 

 are the longest, the posterior ones being a little shorter ; the soft 

 dorsal and anal and the caudal lobes are j^roduced into a point. 

 Light-yollowish-olive (in spirits), dorsal fin blackish ; a deep-black 

 spot superiorly in the axil of the pectoral. 

 Hab. ? 



a. Four inches long. Presented by Sir J. Richardson. 



b. Two inches long. From the Haslar Collection. 



22. Pomacentrus trilineatus. 



Poniacentrus trilineatus, (Ehrenh.) Cuv. S,- Val. v. p. 428. 



biocellatiis, J?(V/jp. N. W. Fischc, p. 127. tab. 31. fig. 3 (young, 



not good). 



D. f^. A. l^. L. lat. 28. L. transv. 3/9. 



The height of the body is contained twice and three-fourths in the 

 total length ; prteorbital denticulated, with two stronger teeth an- 

 teriorly. The dorsal spines increase in length towards behind ; 

 caudal emarginate, with the lobes rounded. Greenish-olive (in spiiits 

 brown) ; the base of the caudal and the caudal itself yellowish ; each 

 scale with one, two or three sky-blue dots ; three or five very fine 

 blue lines along the forehead, the outer of which are continued on 

 the nape of the neck and sometimes along the base of the dorsal fin ; 

 a round dark spot above the operculum ; a black spot edged with 

 blue on the back of the tail, immediately behind the dorsal fin ; 

 yomig specimens with a second similar spot on the anterior third of 

 the soft dorsal fin. 



Red Sea. Mozambique. Molucca Sea. 



a-c. Adult, half-grown, and young. Red Sea. Collected and pre- 

 sented by Dr. Riippell. 



d. Adult. Massaua. From the Berlin Museum. 



e. Fine specimen. Molucca Sea. 

 f-(j, h, i. Adult and half-grown. 



23. Pomacentrus tseniometopon. 



lileeh. Amboina Sf Cera»i, p. 283. 



D. ,-^j. A. ^3. L. lat. 28. L. transv. 3/10. 



The height of the body is contained tmce and two-thirds in the 

 total length ; pr«orbital and suborbitals denticulated, with the an- 

 terior teeth not stronger. The dorsal spines increase somewhat in 

 length towards behind ; caudal emarginate, with the lobes rounded. 

 Greenish -violet (in spirits bro\^^l) ; vertical fins darker posteriorlv ; 

 scales ^vithout blue dots. A pair of very fine blue lines or series of 

 dots along the forehead and the neck ; a round dark spot above the 



