Report of a Mission lo Guam . 69 



twice as long as the two opercular spines. Preor])ital with a strong 

 spine anteriorly, and another not quite so strong under the anterior 

 third of pupil. Fins : The third, fourth and fifth dorsal spines are 

 longest, but are only two-thirds as long as third anal spine, and are 

 rather shorter than the soft dorsal. Caudal well forked, the lobes 

 equal. Pe(5lorals slightly longer than ventrals, 1.25 into head. 

 Color in spirits : Silvery whitish, with wash of yellowish. About 

 1 2 indistin(5lly darker stripes on body. Fins 3'ellowish white, with a 

 slightly darker splotch between the two anterior spines at base. 

 The original description of this fish gives the dorsal fin as xi 14, 

 and the figure in Voy. Astrol. Poiss., Pi. 14, Fig. 4, gives the 

 stripes on the body, especially on lower half, as darker red than 

 the ground color, which is very true of the specimen before me. 

 One specimen. Length 5.50 inches. Guam, July 14, 1900. Hab. 

 New Guinea, Guam, Marianas. 



72. Holocentrus unipunctatum Gunth. I^esiog. 



Head 2.66 ; depth 2.50 ; eye 3 ; interorbital 2 into eye ; snout 

 3.20; maxillary 2.50; D. xl 15; A. iv 10; P. 14; V. i 7. Scales 

 3-45-8. Opercles, preopercles and orbitals serrated. The preopercle 

 spine, measured from scales, 1.66 into vertical limb of the pre- 

 opercle, and about equal to eye ; the two opercular spines of equal 

 size and less than one-half the length of preopercular spine. Fins: 

 The third, fourth and fifth dorsal spines the longest. Ventrals and 

 pectorals of about equal length. Caudal well forked, lobes equal, 

 the third anal spine the longest — 2.66 into head. Color in life: 

 Red, with about 12 slightly darker red lines. In spirits the fi.sh 

 becomes a dull grayish white, with very indistinct darker lines, the 

 fins being a uniform 3'ellowish white, except a small blotch of black 

 between the first and second dorsal spines, near the base. One 

 specimen. Length 5 inches. Guam, June 14, 1900. Hab. Poly- 

 nesia, Marianas. 



73-74. Holocentrus fuscostriatus sp. nov. Chalak. 



Head 3; depth 3.50; eye 2.66; interorbital 4; snout 3.50; max- 

 illary equal to distance from posterior of orbit to posterior edge of 

 opercle; mandible 1.66; low^er jaw projecting; D. x, i 12; A. iv 8; 

 V. I 7; P. 14; C. 18, with 6 spines on each side. Scales 3-40-8; about 

 27 scales on preopercle, each scale with a brown spot at base. Pos- 

 terior margins of opercles and preopercles denticulate, except the 

 oblique lower half of sub-opercle. The opercle has a single vertical 

 row of 8 scales on its anterior margin. Opercle with two spines from 

 posterior margin, their exposed length 2 into pupil, a minute spine 

 just above these two ; lower margin of interopercle finely toothed; 

 lower angle of preopercle with flat spine, its exposed length from 

 scales 2 into orbit, 2.50 into horizontal length of preopercle. Pre- 

 orbitals and sub-orbitals strongly denticulate. Mouth protracted. 



