KYPHOSIDAE. 121 



the scales on nape with tliose on cheeks; upper edge of opercle scaly, rest of 

 head naked; membranes of all the fins scaly nearly to their margins; caudal fin 

 emarginate; upper lobe slightly longer. Teeth broad, incisor-like, those on 

 sides somewhat narrower and indistinctly trilobate; in front of the main series 

 and close to them are supernumerary teeth, these not in a continuous series, but 

 lying in front of every second or third tooth of the main series and are consider- 

 ably shorter than those in main series. 



M. C. Z. 29450 (2 specimens), 29547 (6 specimens). 



Color in alcohol: — general color brownish gray, clouded with dark brown; 

 top of head dark brown, grayish below; a dark band across chin; fins dark 

 brown, pectoral and ventral faintly clouded with darker. 



A cotype 4.25 inches long from Easter Island, shore, has head 3.66 in length 

 without caudal; depth 2.57; eye 3.42 in head; snout 2.82; interorbital 2.82; 

 dorsal XVI, 12; anal III, 10; scales 16-85-25. 



General color brownish gray, head darker, coarsely clouded with dark 

 brown; mottlings tending to form cross-bars, those on middle of body more 

 distinct; pectoral gray with dusky rays, the other fins dark brown; the dorsals 

 show faint traces of spots ; dusky bar across chin ; another fainter across throat ; 

 some faint mottlings on breast. 



Teeth of lower jaw in front, incisor-like, only faintly showing notches, 

 those on sides of lower jaw and all on upper distinctly trilobate; the teeth on 

 each jaw in a single series. 



Another cotype. No. 3180, M. C. Z. 29658, 9.37 inches long from Cook Bay, 

 Easter Island, has head 4 in length; depth 2.30; eye 3.84 in head; snout 2.50; 

 interorbital 2.77; dorsal XV, 13; anal III, 10; scales 16-89-25. 



General color same as in 4.25 inch specimen; mottled everywhere with 

 brown, but there are no traces of cross-bars. 



Movable teeth in a single series, mostly trenchant, some, however, showing 

 traces of three lobes. 



Twenty-six specimens .75 to 1.5 inches long from La Perouse Bay, Easter 

 Island, December 17, 1904, shore. 



Of these three have dorsal XV, 12; one has dorsal XV, 13; 5 have dorsal 

 XVI, 11; 14 have dorsal XVI, 12 and 3 have dorsal XVI, 13; the anal is con- 

 stantly III, 10. 



The 1.5 inch specimen has head 3.20 in length; depth 3.20; eye 3.33 in 

 head; snout 3.33; interorbital 4; dorsal XVI, 11; anal III, 10. Two speci- 

 mens 2? and 3n inches long from the same place. 



