Jordan and Evennann. — Fishes of North A?nerica. 2301 



inserted behind dorsal; ventral raj's I, 3. {Sd.HtvXo'^, finger; dHOTtdz, 

 gazer, short for Uraiioscopits.) 



DACTYLOSCOPUS: 



a. Dorsal rays X to XII, 22 to 31 ; anal rays less than 35. 



b. Soft dorsal with 22 soft raya; anal with 26. pectoealis, 2637. 



66. Soft dorsal with 28 to 31 rays; anal with 32 or 33; scales about 45. 



c. Body ratlier slender, the depth ahout 6 inlenj^th (7 with caudal) ; opercular 

 fringe of 15 filaments. tridigitatus, 2038. 



ec. Body rather .stout, the depth 5J in length (6 in total with caudal) ; oper- 

 cular fringe of 18 filaments. 

 d. Back not barred ; head blotched and dotted. poeyi, 2639. 



dd. Back with about 10 pale cross bars ; head marked with wliitlsli ; a 

 dark bar at base of caudal. unaticus, 2640. 



ESLOSCOPUS (eVAd?, good, o-kotto! for Uranoscopvs): 

 aa. Dorsal rays VI, .38; anal rays II, 37; scales 6-51-5. zelotes, 2641. 



Subgenus DACTYLOSCOPUS. 



•2637. DACTYLOSCOPUS PECTOU.\LIS, Gill. 



Head about 5 iu total length with caudal; depth about 7 (in total). D. 

 XII, 22; A. II, 26; P. 12; V. I, 3. Width of head behind operculum 7 in 

 total length with caudal; eye small, 10 in head; interorbital space eijuals 

 diameter of eye; preoperculum broader at the angle than iu Dactijloscopus 

 tridigitatus; pores well developed; opercular fringe of 11 or 12 free fila- 

 ments; origin of dorsal between i and J length of fish from tip of sno.ut; 

 origin of anal under sixth or seventh dorsal ray, the first 12 dorsal and 

 2 anal rays simple. Psendobranchi;e obsolete. Color light brownish 

 yellow, with dark spots on the back, arranged iu linos forming the out- 

 lines of about 6 quadrangular areas, from the angles of which irregular 

 lines proceed downward, converging toward those (leparting from the 

 angles of adjoining areas; more scattered and irregular s])ots and dots 

 often present below the lateral line; head lighter, diffused with pink 

 above. Each orbit with 4 diverging bands, 1 in front, a bifurcated one 

 from the an tero- inferior angle, and 2 from posterior border, a transverse 

 sinuated nuchal line ; upper angle of operculum whiti.sh, bounded in front 

 by a dark line or sjiot. (Gill.) Cape >San Lucas; not seen by us. (pec- 

 toralis, pertaining to the breast.) 



Dactyloscopus pectoralis, Gill, Proc. Ac. Nat. Sci. Phila. 1861, 267, Cape San Lucas. (Coll. 

 John Xantus.) 



203.S. DACTYLOSCOPUS TUIDIGITATIS. (iill 



Head .5 (in total) with caudal; depth 7. D. XII, 28; A. II, 32; P. 13; 

 V. I, 3 ; scales 11 + 4 + 30 = 4.5. Body slender, much compressed posteri- 

 orly ; operciilar fringe of 15 separate filaments. Origin of dorsal fin over 

 the lower angle of the base of the pectorals, or immediately before the 

 margin of the operculum, its distance from snout to dorsal 5 in total 

 length of body. Pseudobranchite very small (overlooked hy Dr. Gill, but 

 evident in living specimens). In life, pale sand color above, the lower 

 part whitish ; above 12 narrow cross bands of whitish on the back, not 



