2246 Bulletin 4.7, United States National Museum. 



2577. MICROGOBIUS SIGNATUS, Poey. 



Head 3i to 4 ; depth 4 (female) to 6^ (male) ; eye 3i to 4. D. VII-17 to 20 ; 

 A 18 to 21 ; stales 68 to 70 ; vertebra; 14 + 15. Body very much compressed, 

 more or less elongate; head much compressed, deeper than wide; snout 

 very short, acute, the anterior profile not decurved, not steep ; preorljital 

 not as wide as pupil ; mouth very large, almost vertical ; maxillary extend- 

 ing to below pupil, 2 in head in male, 2i in female; lower jaw projecting; 

 teeth of the outer series enlarged and recurved. Dorsals contiguous, 

 spines very fine, produced in filaments, the third longest, a little longer 

 than head ; second dorsal and anal high. Scales as in M. giilosus. Skull 

 rounded, very fragile; a median crest which is highest between eyes; 

 lateral crests developed, the inner ones meeting above posterior part of 

 eye; interorbital comparatively broad, the median crest ending above 

 anterior part of the orbit. Teeth in each jaw in 2 or 3 series ; outer series 

 of the upper jaw enlarged and recurved, the inner ones minute; outer 

 series of lower jaw smaller than those of upper jaw, the one nearest angle 

 of mouth an enlarged canine. Dark gray ; female with a short bright 

 blue bar, bordered by blackish above pectoral; a blotch of sky blue and 

 oran"-e below eye; fins dusky, the ventrals pale in female; males with the 

 body plain bluish gray. The sexual differences in this species are very 

 strongly marked. West Indies, in salt water ; common in Cuba ; one of 

 the smallest gobies, barely 2 inches long. Here described from Havana 

 examples collected by Dr. Jordan, {signatus, marked.) 



Microgohius gignatus, PoEY, Enumeratio, 127, pi. 5, fig. 3, 1875, Cuba (Type in M. C. Z. 

 Coll. Poey) ; Jordan, Proc. TJ. S. Nat. Mus. 1886, 49; Jordan & Eigenmann, I. c, 505. 



819. ZALYPNUS, Jordan & Evermann. 



Zahjpnus, Jordan & Evermann, Check-List Pishes, 459, 1896 (emblematicus) . 



This genus difters from Microgobius in having the anterior half of the 

 body naked. Soft dorsal and anal long, of 16 or 17 rays. Two species 

 known. (CdA?/, surf; vitvo<i, slumber.) 



a. Scales 48 ; shoulder with a round black spot ; none of the dorsal spines elongate. 



CVCLOLEPIS, 2578. 



(Id. Scales 65 ; a silvery cross bar behind pectorals ; some of the dorsal spines usually 

 elongate. emblematicus, 2579. 



2578. ZALYPXUS CYCLOLEPIS (Gilbert). 



D. VII-16; A. 17; scales 48. Body somewhat elongate, compressed, the 

 mouth very large, narrow, and oblique; maxillary produced beyond the 

 rictus for a distance equaling f diameter of orbit, reaching vertical from 

 posterior margin of pupil, 1| in head; snout short, 5 in head; eye larger, 

 3| in head; interorbital width i orbit; teeth in upper jaw in 2 series, the 

 outer enlarged and distant; in lower jaw apparently in a single series, 

 similar to outer series of upper jaw, with 2 stronger canines anteriorly. 

 Inner edge of shoulder girdle without fleshy prominences. Dorsal spines 



