98 PROCEEDINGS OF THE NATIONAL MUSEUM 



Etymology. — This species is named for Wilbert M. Chapman in 

 recognition of his studies on blenniid fishes. Since the foregoing de- 

 scription, I have learned that Chapman, many years ago, independ- 

 ently concluded that this form represented a new taxon — making it 

 doubly appropriate that the species be named for him. 



Entomacrodus sealei Bryan and Herre 



Plate 18 

 Entomacrodus sealei Bryan and Herre, 1903, Occ. Pap. Bemice P. Bishop Mus., 



vol. 2, no. 1, pp. 138-139 [Marcus Island]. 

 Entomacrodus incisolabiatus Schultz and Chapman, 1960, Bull. U.S. Nat. Mus., 



vol. 202, pt. 2, pp. 332-334 [ocean reef and surf, southeast end Enyu Island, 



Bikini Atoll]. 



Description. — Segmented dorsal fin rays 13-16 (15 in 80 percent 

 of specimens); segmented anal fin rays 15-17 (16 in 85 percent of 

 specimens) ; posteriormost anal pterygiophore supporting 1 or 2 

 external elements (2 in 93 percent of specimens) ; total gill-rakers on 

 first arch 15-21 (16-19 in 92 percent of specimens); pseudobranchial 

 filaments 4-7 (6 or 7 in 90 percent of specimens) , number not increasing 

 with increase in SL; vertebrae 33 or 34 (33 in 2 of 23 specimens); 

 supraorbital cirri 1-7, number increasing with increase in SL (table 

 45); main or longest supraorbital cirrus with all branches mesially; 

 nape with 1 cirrus on each side; predorsal commissural pores 3-34, 

 number increasing with increase in SL (table 46) ; preopercular series 

 of pores including 3-5 positions with pairs or multiples of pores (pore 

 positions never all simple in specimens over 22 mm SL) ; 1 pore before 

 each anterior nostril; lateral line pores terminating on side in area 

 below and between dorsal fin spine 1 1 and dorsal ray 5 ; ventral margin 

 of upper lip crenulate on lateral thirds, entire on middle third (one 

 specimen, 22 mm SL, from Raroia had upper lip completely crenulate) ; 

 lip crenulae usually numbering 7-10 on each side. 



Proportional measurements: See tables 3, 4, and 47. 



Males develop fleshy rugose modifications of the skin of the anal 

 spines and the anterior first to third rays. If one considers males 

 with these modifications to be mature, the smallest mature male 

 examined was 39.0 mm SL. Mature and immature males may occur 

 in the same collection and in these collections immature males may 

 be as much as 7 mm longer than mature males. 



The largest specimen examined was a male, 64.2 mm SL; the largest 

 female was 54.1 mm SL; below the latter size males and females occur 

 with relative equal frequency. Only two specimens, males, were larger 

 than 59.9 mm SL. Males and females occurred in collections in about 

 equal numbers. The smallest specimen examined was 18.0 mm, not 

 an ophioblennius^ stage. It had two pairs of pores included in the 



