NEW GENERA AND SPECIES OF FISHES FROM PUERTO RICO. 359 



Color in alcohol : Brown, mncli spotted aud vermiculated with darker; top of head, 

 brown, sides and nnder parts pale, crossed by about 5 broad, irregular brown bars ; side 

 of body with about 5 or 6 broad, dark crossbars, broader than the paler interspaces, 

 broadest and darkest above and extending upon dorsal fin; under parts of body 

 paler, more speckled; spinous dorsal with numerous small brown specks, a large 

 black ocellus on base of 3 anterior spines, and a larger one on base of last 4 dorsal 

 spines, being chiefly on body; soft dorsal, caudal, and aual each crossed by several 

 series of small brown spots ; pectoral and ventrals pale, the pectoral with a few brown 

 spots at base. 



The above description from the type, a female, 2.5 inches long, No. 49371, U. S. N. M., 

 obtained at Hucares, February 14. Three female cotypes gotten at Fajardo, February 

 17, and one at Culebra, February 9, agree closely with the type; 2 of these, however, 

 show faint traces of narrow horizontal lines along lower part of side. 



A male, 2.5 inches long, from Culebra, February 11, taken as one of the cotypes, may 

 be described as follows: Head 3.5; depth 3.7; eye 3.8; snout 3.2; maxillary 3.1; 

 mandible 2.4; interorbital7; preorbital6.2; scales 3-45-9 ; D. xx, 10; A. ii, 19; P. 14; 

 V. 2 ; C. 13 ; longest dorsal spine 2 in head, longest ray 1.4 ; longest anal ray 1.5 ; pec- 

 toral 1; ventral 1.1; caudal 1.1. Color in alcohol, tolerably uniform brown; cross- 

 bars on side very faint; longitudinal lines more evident than in the female; throat 

 aud under parts of head mottled with white and light brown; fins less speckled 

 than in female, the soft dorsal and anal pale, almost without sjiots. 



Another male, 2.25 inches long, from Culebra, February 11, agrees with the large 

 specimen just described, except that the crossbars on body are more distinct. 



This species most closely resembles M. Mmaculatus Steindachner, from which it 

 differs in the larger head, greater depth, smaller mouth, narrower interorbital, and 

 in the color. The tips of the anal rays are not white, the soft dorsal is spotted like 

 the caudal and anal, and there are no white spots on base of pectoral, as is said to 

 be the case in M. hirnaculatus. 



The collection contains 7 specimens of this species, as indicated above. 



AUCHBNISTIUS Evermann & Marsh, new genus. 



Aucheniatius Evermann & Marsh, new genus of Blenniidae (stahli). 



This genus has the form of Aachenopterits and suggests that genus strongly. It 

 differs in the absence of a lateral line, in the much smaller scales, in the absence of 

 a notch at the front of the dorsal fin, and in the uuion of the membrane of the anal 

 fin with that of the caudal. 



avxWf nape; idrtov, sail or fin. 



15. Auchenistius stahli Evermann & Marsh, new species. 



Head 5; depth 6.5; eyes 4.8; snout 6; maxillary 2.8; scales about 58, about 12 

 in transverse series; D. xli or xlii; A. ii, 23 or 24; pectoral 2.5; ventral 2.2; 

 caudal 1.3. 



Body elongate, somewhat compressed, especially posteriorly, the dorsal and ven- 

 tral outlines alike; head small, upper profile straight and descending; snout mod- 

 erate, pointed; mouth large, the maxillary reaching to or beyond middle of eye; the 

 jaws equal, heavy and projecting; teeth in lower jaw conical, short and strong, 

 slightly recurved, in one row; teeth in upper jaw similar to those in lower, but a 

 small patch of smaller teeth in front of jaw behind the main row; teeth on vomer; 

 gill-membranes joined to the isthmus; nostrils with short tubes, a single flap above 

 each eye aud one on each side of nape ; dorsal fin long, of spines only ; last four spines 

 somewhat longer than the preceding, forming a shallow notch, a feature lacking in 

 the other examples; anal origin about midway between tip of snout and tip of 

 caudal, the fin similar to dorsal iu shape, but somewhat lower; membrane of dorsal 

 and anal joined to caudal; caudal small, pointed; pectoral small, of 8 rays; ventral 

 small, of 2 rays. 



