THE S1I()I{K FISHES. 259 



liji, with a single row of teeth which ai-e sliort, compressed and either roundeil or 

 sHghtly notched and sHghtly constricted at the base; lower lip with an outer 

 fringe of fine simple cilia and some very much finer, scattered ciliae on its upper 

 surface; many rows of small, sharp, cur\'ed teeth on vomer and palatines. 



("haenonuigil of (Jill is based on Mugil proboscideus CUinther. The generic 

 characters according to dill, Proc. Acad. Nat. Sci., Phila., 1863, p. 169, are: "the 

 longitutlinal cleft of the mouth, the narrow and j^ointed lower jaw and the thick 

 and angular upper lip"; the la.st of which is the only one in this descrijjtion 

 which actually separates it from Myxus. 



In Fishes of the Hawaiian Islands. .Jordan iV- Evermann give as generic 

 characters of Chaenomugil, "Cleft of mouth lateral; lower jaw narrow; denti- 

 form cilia in very many series, broad flat and somewhat paved; upper lip very 

 thick; no atlip(.)se eyelid." 



Species of Chaenomugil proboscideus in the IT. S. National Museum col- 

 lected at Mazatlan by Dr. Jordan, and pi'obably identified by him, agree in the 

 above charactei's antl differ from Mijxus eloiHjolus in having no vomerine or 

 palatine teeth; they also agree with the sjiecific reriuirements of C. proboscideus 

 as given by Gunther. 



In Fishes of Hawaiian Islanils, .Jordan i^' Evermann descril^e and figure a 

 species which they identify as ClmenonmgH chaplali and include in its synonymy 

 Myxus {Neoinijxus) sclateri Rteindachner. They give another species which 

 they identify as Myxus pacificus Steindachner, l)Ut in the synonymy of the 

 genus Myxus they give Neomyxus Steindachner, based on A'^. sclateri. 



Specimens in the U. S. Bureau of Fisheries reserve series, and U. S. National 

 Museum labeled Chaenomugil chaploU from the Hawaiian Islands, being the 

 specimens upon which .lordan & Evermann based their descriptions, agree 

 neither with the generic requirements of Chaenomugil nor Myxus but agree 

 perfectly with Steindachner's description of Myxus (Neoviyxus sclateri) in which 

 the rather slender labial ciliaform, pectinate, movable teeth are in two rows in 

 each li]) with sometimes a portion of a third low indicated. The character of 

 these teeth, so widely different from those of Myxus, and the difference in the 

 number of rows from those of Chaenomugil were indicated by Steindachner as 

 sufficient basis for a new subgenus. We believe it, however, to be of generic 

 value and that Xeomyxus is a good genus. 



