128 U.S. NATIONAL MUSEUM BULLETIN 2 02 VoL 2 



PTEBAGOGUS GUTTATUS (Fowler and Bean) 



Plate 92,A 



Duymaeria guttata Fowler and Bean, U. S. Nat. Mus. Bull. 100, vol. 13, p. 218, 

 1928 (type locality, Philippines, holotype (USNM 89969) examined). 



SPECIMENS STUDIED 



Rongelap Atoll, two miles west of Bush Island, dredge, depth 180 feet, June 21, 

 1946, S-46-232, W. R. Taylor, 1 specimen, 20 mm. 



Description. — Dorsal X,10; anal III, 9; pectoral ii,ll-ii,ll; pores 

 in lateral line 16+2+6, with 2 scales above and 6 scales below 

 lateral line; dentae on preopercle 13. 



Head 2.5; greatest depth 2.7; snout tip to anus 1.6; snout tip to 

 dorsal origin 2.3; all in the standard length. Snout 3.7; eye 3.1; 

 postorbital length of head 2.1; fleshy interorbital space 5.7; least 

 depth of body 6.2 ; all in length of head. 



Color in alcohol. — Background pale to whitish; a dark spot between 

 dorsal spines I and II, and another at rear end of soft dorsal base; 3 

 or 4 dark spots just behind nape on back and a spot one scale row 

 below dorsal origin ; opercle with dusky blotch. 



Remarks. — My identification of tliis small specimen is uncertain 

 because of variability in color pattern and sexual dimorphism for the 

 species referable to this genus. Although the lateral line appears to 

 be interrupted, by means of a jet of compressed air, it was possible 

 to note its continuation. One of the paratypes of P. guttatus also 

 has an interrupted lateral line on one side, but can be traced by 

 compressed air. 



I have studied 1 1 specimens of this species and find the dentae on 

 the preopercular edge vary from 13 to 25, with an increase in number 

 of dentae on the larger specimens. 



PSEUDOCHEILINOPS, new genus 



Type species. — Pseudocheilinops ataenia, new species. 

 This new genus is most closely related to Pseudocheilinus but differs 

 as indicated in the following key: 



la. Preopercular edge smooth; 2 or 3 pairs of small canines between the enlarged 

 hooked pair near front of upper jaw; a single pair of enlarged canines at 

 tip of lower jaw Pseudocheilinus Bleeker 



16. Preopercular edge finely serrate; a single pair of small canines between the 

 enlarged hooked pair near front of upper jaw; two pairs of canines at 

 tip of lower jaw, the outer pair largest Pseudocheilinops, new genus 



Remarks. — Named in reference to its similiarity to Pseudocheilinus. 



