330 BULLETIN 189, UNITED STATES NATIONAL MUSEUM 



head, the soft part with a produced anterior lobe, about as long as 

 head posterior to middle of eye ; ventral inserted about half as far from 

 base of lowermost ray of pectoral as from origin of anal, not thickened 

 by membrane, 1.7 to 1.9 in head; 6 lower rays of pectoral simple, their 

 free tips slightly thickened, the two upper simple rays the longest, 

 generally reaching somewhat beyond midlength of ventral, 1.25 to 1.6 

 in head, 4.0 to 4.5 in length. 



Color quite dark brown; lower surface of head, chest, and abdomen 

 pale, side with four pale bars, the first extending from bases of last 

 spines and anterior soft rays of dorsal obliquely downward and back- 



FiGURE 70. — Cheilodactylus elongatus, new species. From the type, 385 mm. long, Lobos de 

 Afuera Bay, Peru (U.S.N.M. No. 128063). 



ward to origin of anal, the next two under soft dorsal, and the last on 

 caudal peduncle; upper lip and exposed part of maxillary nearly black; 

 membranous margins darker than rest of exposed parts of scales ; fins 

 all rather dark brown; inner side of pectoral very dark; simple rays 

 of pectoral distally pale; outer margin of ventral pale. 



This apparently new species of pintadilla is represented in the 

 collection furnished by the Mission by four specimens, 315 to 390 mm. 

 (253 to 318 mm. to base of caudal) long. Two of these were seined in 

 Lobos de Tierra Bay, and two were taken in a trammel net in Lobos de 

 Afuera Bay. One of the specimens from Lobos de Afuera Bay 

 (U.S.N.M. No. 128063), which is 385 mm. (310 mm. to base of caudal) 

 long, has been selected as the type, and the following proportions and 

 enumerations are based on this specimen: Head 3.0 in length; depth 

 3.0; pectoral 4.3. Eye 5.3 in head; snout 3.8; interorbital 3.9; maxil- 

 lary 3.2; caudal peduncle 3.5; sixth dorsal spine 3.5; second anal spine 

 6.0; ventral 1.7; pectoral 1.4. D. XVI, 29; A. Ill, 10; P. 8 + 6; V. I, 

 5; scales 6 — 54; gill rakers 6+15. 



The four specimens of this species in the collection all appear either 

 to have been more or less dry or to have been preserved in too strong 

 a solution of alcohol, which caused shrinkage, and therefore are not in 

 an especially good condition. However, they undoubtedly represent 

 a slenderer fish, with a lower back, than C. variegatus. Furthermore, 



