IISO Bulletin 47, United States National Museum. 



1569. MTCTEROPERCA XENARCHA, Jordan. 



Head 2|: depth 3; eye small, 7 in bead. D. XI, 16; A. Ill, 11; scalea 

 25-110 to lli>-50. Body rather deep and compressed : head compressed, 

 with rather short, sharp snout, which is 4 in head; profile steep and 

 nearly straight ; mouth large, the maxillary reaching scarcely beyond 

 eye, 2 in head : lower canines small ; upper canines (2 in number) strong, 

 scarcely directed forward; preorbital narrow, f width of eye ; interor- 

 bital area convex, its width 4^ in head; nostrils small, the posterior 

 scarcely the larger, separated from the anterior by one diameter ; angle 

 of preopercle scarcely salient, but provided with coarser teeth ; a rather 

 sharp notch above it ; opercular spine flat and divided into about 6 teeth 

 at the end; gill rakers moderate, 9 + 18; scales moderate, scarcely ctenoid ; 

 dorsal spines low, the outline of the spinous dorsal gently convex, the 

 fourth spine longest, 3 in head; soft dorsal high, its outline angular, the 

 tenth ray produced, 1^ in head : anal lin formed as in ITyctcroperca falcata, 

 its seventh ray produced and falcate, 1* in head, its posterior outline 

 concave ; caudal subtruncate, the outer slightly produced ; pectoral If in 

 head. Color in spirits plain dark olivaceous, the edges of the fins scarcely 

 darker, Kocky Islands of the eastern Pacific from Mazatlau to the coast 

 of Peru; kuowm from numerous specimens in the Museum of Compara- 

 tive Zoology at Cambridge, from the Galapagos Islands, and from Payta, 

 Peru. The above description is from a specimen 22 inches long, taken by 

 us at the Venados Islands, near Mazatlau. This is larger than the original 

 Types of the species, (^ei'of, strange; apxo^, anus.) 



'Mijcteroperca j-enaroAa, Jordan", Proc. Ac. Nat. Sci. Phila., 188", 38", James Island. Galapagos 



(Type, No. 24198, Mu3. Comp. Zool.); Jordan" k Eigesmans, I. c, 372, 189iJ. 

 EpinepheX%is xenarchus, Boulkngeb, Cat., i, 266. 



Subgenus PAREPINEPHELUS, Bleeker. 



1570. irrCTEBOPERCA RUBER iBloch). 



(Sciresga.) 



Head 2^ in length ; depth 2*. D. XI, 16 : A. Ill, 11 or 12 : scales 15-95 to 

 115-40 to 46, pores 75 to 85. Body rather deep, compressed, the snout 

 sharp, the anterior profile straight : interorbital space flat or convex, 4 to 

 5i in head ; mouth moderate, the maxillary extending just beyond eye, 

 2\ in head ; eye 4i to 7 in head ; canine teeth small ; preopercle with a 

 salient angle : gill rakers very long and slender, x + 31 (22 to 35 accord- 

 ing to Boulenger), the longest I diameter of eye and 7^ in head; dorsal 

 spines small ; soft dorsal slightly angulated, the longest ray 2} in head ; 

 anal fin (in most specimens, especially in adults) sharply angulated as in 

 M. falcata, the longest ray If in head, in young specimens rounded; 

 caudal lunate, the angles well produced in the adult, the fin subtruncate 

 in young ; pectoral 1| in head ; ventrals short, not reaching vent, (2| to 

 3J. Boulenger). Coloration grayish olive, with reticulations of dark 

 around irregular roundish pale spots ; a black mustache along edge of 

 maxillary ; fina not much darker than body, usually dusky at tip ; young 



