O. POMACENTRUS. 25 



the lateral teeth being very small. Prseorbital very naiTow and not 

 serrated ; prseopercuhim finely serrated ; operculum with two spines. 

 The scales on the upper 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 produced into a point. 

 Light-yellowish-oHve (in spirits), dorsal fin blackish ; a deep-black 

 spot superiorly in the axil of the pectoral. 

 Hah. ? 



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

 h. Two inches long. From the Haslar Collection. 



22. Pomacentrus trilineatus. 



Pomacentrus trilineatus, (Ehrenb.^ Cuv. Si- Val. v. p. 428. 



biocellatus, R'dpp. N. W. Fische, p. 127. tab. 31. fig. 3 (young, 



not good). 



D. J5. A. ^. L. lat. 28. L. transv. 3/9. 



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

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

 teriorly. The dorsal spines increase in length towards behind • 

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

 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 ; 

 young 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 yovmg. Red Sea. Collected and pre- 

 sented by Dr. RiippeU. 



d. Adult. Massaua. Frpm the Berlin Museum. 



e. Fine specimen. Molucca Sea. 

 f-g, h, i. Adult and half-grown. . 



23. Pomacentrus taeniometopon. 



Bleek. Amboina <§• Ceram, p. 283. 



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



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

 total length ; praeorbital 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 spiints brown) ; vertical fins darker posteriorly ; 

 scales vdthout 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 



