628 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



ous for the entire length of the upper jaw, maxillary not evident, appar- 

 ently aclnate to the skin of the preorbital. 



First dorsal spine inserted over margin of preopercle ; spines all very 

 slender and flexible, the posterior but weakly differentiated from the 

 soft rays, the anterior portion of fin very high, the spines filiform, not 

 exserted beyond the membrane ; the longest dorsal spine about one- 

 third length of body, the last spine about one-half head ; membranes 

 of last rays of both dorsal and anal slightly joined to base of caudal. 

 Front of anal nearer snout than base of caudal by a distance equaling 

 one-tliird length of head. Caudal three-fifths length of head; ventrals 

 and pectorals slightly less. 



A specimen 2 inches long, collected by Professor Bradley at the Pearl 

 Islands, serves as the type of the species, and is numbered 29,07(3 on 

 the register of the U. S. National Museum. Numerous smaller speci- 

 mens are in the collection from the same locality. 



85. Cremnobates monophthalmus Giinther. 

 86. Salarias mbropunctatus C. & V. 



Six specimens of this species, the longest 3 inches in length, were 

 collected by Professor Bradley at the Pearl Islands. The fin rays, 

 coloration, and proportions are those assigned this species by Cuvier 

 and Valenciennes. In addition, there is a distinct jet-black spot behind 

 the eye, with a narrow light edge anteriorly. 



Head = depth, 4 in length (5 in total) ; eye 4.^ in head. D. XI, IG; A. 

 20. The teeth are somewhat less flexible than in S. atlanticus, and the 

 canines in lower jaw are wholly wanting. 



Specimens of the same species collected by Professor Bradley are in 

 the collection from Callao. Tbe species called by Kner (Novara Fische, 

 198) >S'. ruhropunctatns seems to be different from this. 



87. Dactyloscopus sp. iiov. 



f ? Dacti/lagjius miindiis Gill, Proc. Acad. Nat. Sci. Pliila., 1862, 505, 506. 



A specimen in the present collection, taken by Captain Dow on the 

 coast of Central America, agrees well with the type of Dactylagnus mun- 

 dus. It has, however, tlie dorsal beginning at the nape, and the psendo- 

 branchife wanting. It is, therefore, a typical Dacfi/Joscopus, and i^roba- 

 bly represents a species hitherto undescribed, but without further infor- 

 mation we are not prepared to describe it as new, as it may be really 

 identical with Dactylagnus mundus. 



Color in spirits, light olivaceous, the edgings of the scales, some ver- 

 miculations on top of head, and the labial fringes, clear brown. Fins 

 translucent; the caudal with a brown bar at base. Eyes dark. 



Head 4^ in length ; depth 6f . D. VI-38 ; A. II, 37. Y. 3. Scales 

 G-5I-0. B. G. L. 3i inches. 



Head and body slender, compressed, the greatest width at occiput 

 four-ninths length of head; the greatest depth is immediately behind 



