2302 Bulletin 4.7, United States National Museum. 



extending down far on the sides ; head mottled above ; fins all pale. West 

 Indies, north to Key West ; rather common in coral sand in shallow water 

 about Key West, (ires, three; digitus, finger, from the 3 ventral rays.) 



Dactyloscopus tridigitatus, GILL, Proc. Ac. Nat. Sci. Phila. 1859, 132, Barbados (Coll. Dr. 

 Gill); GILL, I. c., 1861, 264; GILL, I.e., 1862, 505; GUXTHER, Cat., in, 279, 1861; JORDAN 

 & GILBERT, Synopsis, 753, 1883; JORDAN, Proc. U. S. Nat. Mus. 1884, 140. 



2639. DACTYLOSCOPFS POETI, Gill. 



Head 5 in total length ; depth 6 in total. D. XI, 31 ; A. II, 32. Body more 

 robust than in D. tridigitatus; head plane above and obtusely angulated 

 at the sides of the plane ; thickness of the head behind the preoperculum 

 exceeding | of its length; interorbital space f diameter of eye. Eye 

 about 7 in head; preopercle as in D. tridigitatus, pores indistinct or obso- 

 lete; opercular fringe of about 18 filaments, the lowest of which are 

 scarcely extended beyond the margin ; origin of dorsal fin g distance from 

 tip of snout; origin of anal fin under sixth dorsal ray; scales of moderate 

 size and regularly imbricated. Color reddish brown, dotted with darker 

 above the lateral line ; head blotched and dotted with darker; opercles 

 variegated; opercular bones nearly immaculate. (Gill.) Cuba; not seen 

 by us. (Named for Prof. Felipe Poey.) 



Dactyloscopus poeyi, GILL, Proc. Ac. Nat, Sci. Phila. 1861, 266, Cuba. (Coll. Felipe Poey.) 



2640. DACTYLOSCOPUS LUNATICUS, Gilbert. 



Head (to end- of opercular fringes) 3, from tip of lower jaw to base of 

 fringes 4 ; depth greater than in related species, 5 in length. D. X or XI, 

 29 or 30 ; A. II, 32 or 33 ; scales about 11 -f 4 + 30 about 45. Head cuboid, 

 narrowed forward, the vertex gently convex; width at occiput i length 

 of head (to base of fringes on opercle). Mouth nearly vertical, maxillary 

 2f in head. Labial fringes short but evident. A short nasal filament. 

 Teeth in a rather broad cardiform band on front of upper jaw, becoming 

 narrow laterally; in lower jaw a single series, or an irregular double 

 series anteriorly ; vomer and palatines toothless. Eyes small, very close 

 together, the interorbital width about -J- their diameter, which equals 

 length of snout, or about - head. Gill lamin:e much reduced in size; 

 a small round pore behind inner arch. Gill rakers obsolete; pseudo- 

 branchiae small but evident. Opercular fringes composed of 18 fila- 

 ments. Dorsal beginning at a distance behind occiput equaling diameter 

 of orbit, its anterior rays but partly joined by membrane, the first 10 

 or 11 slender and not articulated, the last ray distant from base of 

 caudal about a diameter of orbit; origin of anal under sixth dorsal spine, 

 the 2 anterior rays not articulated; pectorals short, ] in head, con- 

 taining 14 or 15 rays; caudal very small, with 10 developed rays, its 

 length 2| in head. Lateral line running high in its anterior portion, 

 declining on 3 or 4 scales, the posterior portion on middle of sides 

 with 29 or 30 tubes; 4 scales between median portions of lateral line 

 and base of dorsal. Color light olivaceous, a dark streak along back, 1 



