Jordan and Eiw man n . Fishes of North A merica . 3181 



the fin. Closely allied to OUgocoltus, differing only in the character of the 

 anal rays of the male. 



(diaXoti, divided: apxo~, anus.) 



2384 (b). DIALARCHl'S NNYDERI, Greelej . 



Head 3ij eye 4 in head; snout 3; D. VIII- 18 or 19; A. 13 to 15; P. 13 

 to 15; V. 1, 3. Body elongate, slender, the snout pointed, compressed; 

 minute conical teeth on jaws, vonier, and front of palatines; jaws equal; 

 mouth horizontal, the maxillary 3 in head, reaching a vertical below ante- 

 rior edge of pupil. Interorbital space g eye, shallowly grooved, the 

 groove leading into a depressed space between the occipital ridges; nasal 

 spines large. Margin of preopercle armed with a strong spine, | as long 

 as eye, from the upper border of which at base extends a second spine 

 pointing abruptly upward and inward; both spines covered with skin in 

 life; margin of opercle ending in a pointed flap entirely unarmed. Brau- 

 chiostegals 6, the membranes broadly united, free from the isthmus. 

 Gills 34, a slit behind the last gill. Dorsal fins large, separated by | 

 diameter of eye, .whole length equaliug that from caudal to base of 

 pectoral; first dorsal beginning slightly in advance of margin of opercle, 

 upper edge nearly straight, curving abruptly downward from the sixth 

 spine; origin of soft dorsal in advance of anal; pectoral large, reaching 

 well beyond the origin of the anal; veutrals almost midway between 

 base of pectoral and anal ; anal fin small, rays all feeble in the fsinale, in 

 the male the first ray only greatly enlarged, joined to the second, the 2 

 distinctly separated from the rest of the fin, the membranes of all except 

 the last 3 or 4 rays deeply ernarginate. Anal papilla small, present in 

 the male only. Cirri very numerous, usually occurring in bunches of 3 

 or 4, those of head joined at the base, forming a comb; 2 pairs of bunches 

 above orbits, with the rudiments of a third bunch in front of these, 3 oil 

 top of head, behind orbits, 2 or 3 bunches just below these on side of 

 head, 2 or 3 siugle cirri on margin of preopercle, a thick bunch above the 

 preopercular spines, 4 or 5 on lower margin of opercle, with a thick bunch 

 on its up'per margin; a short row above the base of the pectoral; a row 

 of bunched cirri along anterior two-thirds of lateral line, another well- 

 defined row along the dorsal fin from the third spine to the sixteenth or 

 seventeenth ray of soft dorsal, this row containing a bunch at the base of 

 each spine and ray, with the occasional exception of the first ray; 5 or 6 

 scattered bunches between the dorsal and lateral rows on each side of 

 body ; a cirrus at the tip of each dorsal spine. 



Color, light reddish brown, sometimes almost pink, thickly spotted with 

 fine indistinct white spots; 4 or 5 irregular dark broxvn spots along the 

 base of dorsal, a baud of same color along lateral line, sometimes very 

 much broken and extending ventrally, shading into the uniform reddish 

 brown below, and including 3 or 4 round pinkish spots; a dark brown 

 post-ocular line, another running forward from the eye, a patch of same 

 color on top of head, another on side of head, and 2 or 3 on edge of 

 opercle; throat reddish brown with several distinct white spots; belly 

 bluish green; a silvery white patch between the bases of the pectorals ; 

 <lorsal lius pale reddish brown with black and clear spots; pectoral 



