88 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 122 



it obviously differs in number of predorsal commissural pores, anal 

 rays and nuchal cirri), and E. decussatus and E. vermiculatus (from 

 both of which it obviously differs in number of gill-rakers and predorsal 

 commissural pores, eye size, and robustness of body). E. rofeni has 

 a consistently lower number of predorsal commissural pores than 

 any other species of Entomacrodus . E. striatus has relatively few 

 such pores, but here there is a range of variation (up to 10 pores). 

 E. rofeni commonly lacks vomerine teeth (4 of 13 known specimens), 

 a lacking found in only very large specimens of E. vermiculatus. 



Remarks. — E. rofeni has been collected with or from the same 

 restricted geographic locality as E. striatus, E. thalassinus, E. sealei, 

 and E. caudofasciatus. It can be differentiated from E. striatum by 

 the characters given in key couplet 22; it differs most obviously from 

 the other three species in having the upper lip completely crenulate 

 and in having more vertebrae and dorsal and anal fin rays. 



Distribution (fig. 5). — E. rofeni is known only from Raroia, 

 Tuamotu Archipelago. 



HoLOTYPE. — SU 62035, an immature male, 34.7 mm SL, from outer 

 reef flat near Garumaoa village, west side of atoll, Raroia, Tuamotu 

 Archipelago, July 11, 1952. 



Paratypes (Collected with holotype).— USNM 199402 (4 speci- 

 mens); channel between Geogeo and Kukina Islets, near Garumaoa 

 village, west side of atoll: SU 62038 (1 specimen); outer reef near 

 Garumaoa village on west side of atoll on shallow tidal flat next to 

 shore: SU 62031 (7 specimens). 



Etymology. — Named for Robert R. Rofen, who collected all the 

 known specimens. 



Entomacrodus strasburgi, new species 



Plate 14 

 Description. — (Character for holotype in parentheses.) Seg- 

 mented dorsal fin rays 13-15 (14); segmented anal fin rays 16 or 17 

 (16); posteriormost anal pterygiophore supporting 1 or 2 (2) external 

 elements (supporting 2 in 82 percent of specimens); total gill-rakers on 

 first arch 11-15 (14); pseudobranchial filaments 5, unvarying with 

 increase in size; vertebrae 34 or 35 (34); supraorbital cirri 1-4 (3), 

 number increasing with increase in SL (table 37); main, or longest 

 supraorbital cirrus with all branches mesially; nape with 1 cirrus on 

 each side; predorsal commissural pores 3-12 (9), increasing slightly 

 with increase in SL (table 38); preopercular series of pores with all 

 positions with simple pores; 1 pore before each anterior nostril; lateral 

 line pores terminating on side in area below and between dorsal fin 

 spine 11 and dorsal ray 4 (dorsal ray 4), usually posterior to dorsal 

 ray 1; ventral margin of upper lip completely crenulate; lip crenulae 

 number 19-26 (25) (see table 5). (The left pectoral fin of the holotype 



