138 PROCEEDEN'GS OF THE XATIOX.\L MUSEUM vol. 122 



missural pores, generally higher than would be expected for E. stri- 

 atiis. All these characters exclude the possibihty that the Waigeo-New 

 Georgia specunens belong m E. striatus. 



Further discussion of the specunens from Tahiti. Raroia. Makatea, 

 and Rarotonga is given in "Relationships" under E. chiostictu.s. 



XoMExcLATURE. — Salunas rarotongenm-s was described without com- 

 parison. I have examined the holotype and find it a typical specimen 

 of the Tahiti-Makatea-Raroia -Rarotonga poptilations of E. caudo- 

 fa-sciatus. Should that group warrant a name. S. rarotongensi-s is the 

 only name available. 



Relationships. — Entomacrodus caudofasciatus is a member of the 

 E. nigricans species group. Of this group E. caudofasciatus appears to 

 be most closely related to the Pacific species in generally having a 

 relatively long supraorbital cirrus (distinguishes E. caudofasciatus from 

 most Atlantic specimens of Entomacrodus) (see also "Relationships" 

 imder E. chiostictus). E. caudofasciatus is distinguished from E. 

 omeliae and E. sealei and from most specimens of E. chiostictus iu- 

 ha\Tng only simple pores in the preopercular series (only four speci- 

 mens of E. caudofasciatus. each with one pair of pores in the series, 

 were encountered). The presence of a dark humeral blotch in most 

 populations of E. caudofasciatus distinguishes that species from E. 

 chiostictus and the Atlantic species, except E. textilis (differentiated 

 from the latter species in key couplet 10). 



Remarks. — E. caudofasciatus has been collected with or from the 

 same restricted geographic areas as E. thalassinus, both subspecies, 

 from which it differs obviously in having crenidae on the ventral 

 margin of the upper hp and, usually, a humeral blotch: E. decussatus, 

 from which it differs ob\"iously in the disposition of the upper Up 

 crenulae and in having usually fewer dorsal and anal rays, gill-rakers, 

 pseudobranchial filaments, and in hairing a humeral blotch: E. 

 striatus (for differences, see "Discussion" above) ; E. cymatobiotus, 

 from which it usually differs obviously in the disposition of the upper 

 hp crenulae. in modal number of dorsal and anal rays, and in having 

 a humeral blotch; E. rofeni. from which it differs obviously in the 

 disposition of the upper hp crenulae and in having a humeral blotch 

 and usually fewer vertebrae and dorsal and anal rays, and more 

 predorsal commissm-al pores; and E. epalzeocheilus, from which it 

 differs obviously in the disposition of the upper hp crenulae and in 

 haWng fewer nuchal cirri, pores before the anterior nostril, gill-rakers, 

 pseudobranchial filaments, and in having simple preopercidar pores. 



Distribution (fig. 9).- — Entomacrodus caudofasciatus is known 

 from the islands of the mideastern Indian Ocean, the South China 

 Sea, Zidu Sea, and the tropical western Pacific from the Palaus to 

 Raroia. 



