k2S. TRACliyPOMA. W7 



2G. Plectropoma chlorurum. 

 Cm: lV J'al ii. p. 40(j*. 

 D.i^. A.f aee.pylor.4. 

 Praoopcrculum finely serrated behind, with three rather stronger 

 denticnhition.s at the angle, and with six at the horizontal Hml). 

 Unil'orm blacldsh brown ; caudal and pectoral fins yellow, the other 

 ones black. 

 Martinique. 



27. Plectropoma unicolor. 



Seba, iii. 27. 10. 



Holocentrus luiicolor, SI. Schn. p. '■^22. 



Plectropoma ephippiimi, Cuv. ^' Val. ii. p. 408. 



D.jf. A.f 



Muzzle pointed ; pra^operculum finely serrated behind, and with 

 rather stronger denticiilations below. Caudalis eraarginate. Brown- 

 ish : a black cross-band on the tail, a black spot in front of the eye, 

 a narrow violet undulated line from the eye to the angle of the prse- 

 operculum ; each scale on the breast with a small whitish speck in 

 the centre. 



East Indies ? 



a. Adult : stuffed. Sine patria. — Of uniform brown colour. 



28. TRACHYPOMAt. 



Seven brancliiostegals. Teeth in villiform bands ; without canine 

 teeth ; teeth on the palatine bones ; tongue smooth. One dorsal, 

 with twelve spines ; the anal with thi'ee. Operculum with moderate 

 points ; praeoperculum Avith spinous teeth at the lower Kmb, dii'ected 

 forward. Scales small. The number of pyloric appendages in- 

 creased (13). 



Pacific. 



1. Trachypoma macracanthus. (Plate XIII. fig. B.) 



D. i|. A. \. L. lat. 65. C^c. pylor. 13. 



Similar to Plectropoma cyanostigma. The height of the body is 3| 

 in the total length ; the length of the head is one-third of the same. 

 Posterior limb of pra;operculum strongly denticulated ; the inferior 

 Avith three strong spinous teeth, the anterior of which is the largest ; 

 sub- and interoperculum entii'e. Caudalis rounded. Brownish (in 

 spirits), covered aU over with very small whitish, darker-edged specks. 



a, b. Norfolk Islands. From the Haslar Collection. 

 c, d. Norfolk Islands. From the Haslar Collection. 



* Plectropoma nic/ricans (Poey, Memor. Cuba, 1851, p. 71) and Pkctropoma 

 accensum (Poey, I. c. p. 72), botli from Cuba, if not the same, are closely allied. 

 t From rpaxw. spinous, and Trw/ia, opercle. 



