FISHES FROM THE REVILLAGIGEDO ARCHIPELAGO. 275 



anterior vomerine one or two in number, bluntish and conical; posterior 

 vomerine teeth rather blunt. Anterior nasal tubes moderate. Dorsal low 

 anteriorly, beginning in front of gill-opening. 



Color brownish-gray or purplish, everywhere covered with small purplish- 

 black spots which are not confluent. In adults the spots are arranged in 

 roundish or ringlike blotches ou the sides; fins colored like body, without 

 dark edges. 



Two specimens, each about 3 feet long, taken at Clarion Island seem to 

 correspond in full with figures given by Dr. Bleeker of this common East 

 Indian species. 



8. Echidna nocturna (Cope). The smallest specimen measures 20 inches and is 



unspotted except for a few faint yellow markings near end of tail. The 

 largest example measures a yard in length. Teeth of lower jaw blunt, sub- 

 equal and biserial, in upper jaw larger and irregularly biserial. Directly 

 under front of eye these teeth become regularly biserial, much smaller, and 

 more pointed; two regular rows of blunt vomerine teeth. Dorsal high, 

 beginning over gill-opening; eye 2f in snout; head 3j in trunk; cleft of 

 mouth 3J in head; tail shorter than rest of body by distance from cleft of 

 mouth to gill-opening. Color seal brown, belly lighter, covered everywhere 

 with irregular spots and points of yellow, the largest about ^ inch across. 

 Lower jaw heavily mottled with yellow; no black margins to spots. Eight 

 specimens were collected among rocks in tide pools at Clarion and Socorro 

 islands. 



Family EXOCCETIDiE. 



9. Exoccetus volitans Linnaeus. 



Halocypselus evolans (Linnseus). • 



Numerous specimens taken from the Gannets of the Revillagigedo Islands. 



10. Exonautes xenopterus (Gilbert). One large specimen from Clarion Island — 



another off Morro Hermoso, Lower California. 



Family MUGILIDiE. 



11. Mugil curema Cuvier & Valenciennes. An abundant species at Socorro Island. 



Four specimens. 



12. Chaenomugil proboscideus(Giinther). Young and large iudividuals abundant 



at Socorro Island. 



Taken commonly in large tide pools with Kuhlia arge. Some of the smaller 

 specimens have the pectorals and anal colorless ; others have a smaller mouth 

 and thinner lips, but these characters are not coordinated with any other 

 dilferences. All probably belong to one species. 



Family HOLOCENTRIDiE. 



13. Holocentrus suborbitalis Gill. Clarion Island and Socorro Island ; twelve 



large examples taken similar to others from Mazatlan. 



14. Myripristis clarionensis Gilbert. Five large examples from Clarion and 



Socorro islands, similar to original types. 



Family MULLIDiE. 



15. Upeneus dentatus Gill. 



Upeneus dentatus Gill, Proc. Ac. Nat. Sci. Phila. 1862, 256. 



Upeneus xantliogr animus Gilbert, Proc. U. S. N. M. 1891, 553. 



A 6-inch specimen from Clarion Island. Teeth in bands anteriorly; uni- 

 sonal behind; scales 38. This specimen certainly belongs to U, dentatus. 

 "W 6 can not separate U, xanthogrammus from it. 



