1897.] NATURAL SCIENCES OF PHILADELPHIA. 77 



Collichthys lucidus (Richardson). 



Scicena lucida Richardson, Ich. Voy. Sulph., 87, pi. 44, figs. 3 and 4. 

 (Not Collichthys lucidus Gunther, Cat., II, 312, 1860, which was based on a 

 young specimen of C. biauritus. See Zoological Record, 1866, p. 143). 



Two specimens, 3 and 6 inches long. 



Head Z\ ; depth 3£ ; eye 5*. D. VIII-I, 23 ; A. II, 12. 



POMACENTRIDjE. 



Pomacentrus jordani Rutter, new species. 



One specimen, 4i inches long; No. 1,760, Leland Stanford, Jr., 

 University Museum. 



Head 3i ; depth 2£ ; eye 2| ; scales 6-44-10.. D. XIII, 13 ; A. 

 11,13; P. 18. 



Profile steep, regularly arched, snout short and blunt, a little 

 over half length of eye. Eye a little greater than interorbital width. 

 Preorbital narrow, the anterior side emarginate, without serrations, 

 its width in middle one-third its length which is two-thirds of eye. 

 Teeth compressed in a single series, quite small on side of jaw, be- 

 coming larger anteriorly, the six front ones in each jaw incisors 

 with a central cusp which, in the single type specimen, is brownish. 

 Maxillary very oblique, extending past vertical from front of eye. 

 Head entirely scaly except between and in front of eyes, four rows 

 of scales on cheeks. Interorbital transversely convex. Vertical 

 limb of preopercle very finely serrated, the serrations a little larger 

 at angle, none on lower limb. Opercle with two weak spines, the 

 upper one notched. Origin of dorsal over beginning of lateral line 

 and upper end of gill-opening. Soft portion scaly at base, the spin- 

 ous portion in a groove, the fourth and fifth spines longest. Origin 

 of anal under tenth or eleventh dorsal spine, the soft portion scaly, 

 the spinous portion in a groove. The last dorsal and anal rays 

 reach base of anal. Pectorals somewhat tapering, equal to length 

 of head without snout. Ventrals nearly as long as pectorals, but 

 not reaching anal. Caudal deeply forked, the lobes slightly fili- 

 form, the upper longer than lower, which is equal to length of head. 

 Least depth of caudal peduncle equal to half its length. Lateral 

 line creasing under fourth soft ray of dorsal, with 30 scales, the por- 

 tion in middle of tail represented on one side only, and that by one 

 or two pores. Color, in alcohol : Olive, scales above lateral line 

 with pale edges, those below with indications of light lines along 

 each row ; a deep black spot at upper base of pectoral, which is 

 otherwise colorless ; dorsal and anal with dark edges, middle rays of 

 caudal and ventrals tinged with black. 



