GILBERT AND STAEKS — FISHES OF PANAMA BAY 145 



There are blue spots on the opercles, and two parallel blue streaks from the eye 

 toward the snout. A streak, or a series of spots, on the suborbital ring. Oj^ercles 

 with a pinkish ground color. There is a blackish half-bar under the posterior portion 

 of the spinous dorsal, the bar narrowing rapidly below, and disappearing on middle 

 of sides; it is directed toward the vent, and seems to be more posteriorly placed 

 than in H. nicholsi. There is a pinkish bar in front of the base of the pectoral. 

 Caudal yellow. Dorsals brownish red, with a blue margin, and blue streaks 

 running obliquely downward and backward. The anal is yellowish at the base, 

 becoming brownish red toward the margin. There is a narrow blue edge, a blue 

 spot at the base of each ray, and two parallel blue lines anteriorly, which divide that 

 portion of the fin into basal, middle and terminal thirds. The ventrals and pectorals 

 are translucent, the outer ventral rays translucent, margined externally with blue. 



270. Halichaeres macgregori sp. nov. 



Plate XXIII, Fig. 45. 



One specimen 87 mm. long was taken in company with Pseiidojulis notosjnbis 

 in a rock-pool on the Panama reef. It was not recognized at the time as a species 

 distinct from notospilus, and no color notes were taken. 



Head 3 in length; depth 3^; depth of caudal peduncle equals distance from tip of snout to 

 middle of eye. Snout 25 in head; eye 5. D. IX, 11; A. Ill, 12. 



Anterior canines -\, those in the lower jaw subequal, the outer canines of the upper jaw 

 smaller than the others, but evidently enlarged. A well-developed posterior canine on each side of 

 the upper jaw, this accompanied on one side of jaw by a smaller tooth more posteriorly placed. 



The dorsal spines are slender but pungent. The last dorsal ray is split to the base. The first 

 anal spine is reduced to a mere rudiment, which can be detected only on dissection. The last anal ray 

 is split to the base, each half being again partially divided. The caudal is evenly rounded behind. 

 The ventral spine is three-fifths the length of the outer ventral ray, the inner branch of which is longer 

 than the outer, but is not filamentous and does not project beyond the contour of the fin. The ventrals 

 do not quite reach the vertical from the hinder margin of the pectorals, and extend only two-thirds the 

 distance from their base to the origin of the anal. The pectorals cover si.\ scales in a series behind 

 their base. 



The scales in front of the dorsal fin fail to cross the median line, the naked space being very 

 narrow posteriorly, but widening rapidly toward the nape. The scales are reduced in size, but are 

 arranged in series continuous with those below and behind them. The scales of the breast are 

 moderately reduced in size, a series anterior to base of ventrals containing 8 scales. 



The lateral line is continuous, the posterior portion running on the third series below the 

 anterior portion. The tubes of the posterior portion are simple, those of the anterior portion divided 

 to form two or rarely three branches. Above the dorsally lying portion of the lateral line is a single 

 horizontal series of scales of full size. Above each scale of this series, and forming with it a very 

 oblique row running upward and forward, are four much smaller scales which decrease rapidly in size 

 upward. The uppermost of these are inserted on the base of the dorsal fin, and constitute an incipient 

 sheath. Similar series of reduced scales running downward and forward are found along the anterior 

 portion of the anal fin. There are 7 horizontal series of full-sized scales between the lateral line and 

 the anterior portion of the anal fin. 



No trace remains of the brilliant colors which this fish undoubtedly displayed in life. In 

 spirits, the ground color is grayish olive, slightly darker along the back. Many scales have each a 



