1302 Bulletin ^7, Uiiited States Natmial Miiseiun. 



not dark; peritoueum dusky. Here described from No. 29387, U. S. 

 N. M. lioth coasts of tropical America; Giiaymas to Panama; St. 

 Lucia to Rio Janeiro; especially abuudaut about Mazatlan. A species 

 of small size, geuerally common on the Pacific coast of tropical America 

 and on the southeast roast of Brazil, and a specimen before us was 

 taken by the Albatross at St. Lucia. We have exauiiued numerous 

 specimens from Brazil in the Museum of Comparative Zoology (from Rio 

 .Taueiro, RioGraudedo Sul, Para, audMarauhao) andothersfrom Acapulco. 

 On comparing these with Pacific coast examples we find no diflerence. 

 This is probably not the original of the poorly figured H. schranki of 

 Agassiz, which on the whole seems most likely to have been a faded 

 example of H. vielavnriim. (Named for Dr. Franz Steindachner, director 

 of the museum at Vienna, one of the most accurate and sagacious of 

 ichthyologists.) 



Diabasis uteindachnei-i, Jokdan &, Gilbeet, Bull. U. S. Fish Comm. 1881 (1882), 322, Pan- 

 ama and Mazatlan (Types Nos. 29305 and 29387 (Panama), and 28172, etc. (Mazat- 

 lan). Coll. Gilbert.) 



Rcemidon rmidimaruJa. Steindachner, Ichth. Beitriige, Ui, 15, 1875; not of Cuvieb \- 

 Vai.km IK\M-- 



Hcemvlon st.'iiiddclnirri. JORDAN & SwAlN, i. c, 299, 1884. 



Hteinulon schranki, EvEEMANN & JENKINS, Proc. V. 8. Nat. Mus. 1891, 153; Jordan \ 

 Feslee, I. c, 473, 1893 ; not of Agassiz. 



1670. H.EMULOX MELAJiURUM (Linnaeus). 



(JeNIGUANA.; 



Head 3; depth 3. D. XII, 16; A. Ill, 8; scales 7-50-15. Eye moderate, 

 5 in head; interorbital width 4; preorbital low, itsleast breadth 7 in head. 

 Gill rakers small, 8 + 13. Body comparatively elongate, the back not 

 much elevated, the profile slightly convex from tip of snout to front of 

 eye, thence more convex to front of dorsal; snout of moderate length, 

 rather jiointed, 2f in head; mouth rather large, the gape a little curved, 

 the maxillary reaching past front of pupil, its length 2 in head; teeth 

 moderate, those in front somewhat enlarged; antrorse teeth of posterior 

 part of jaws not very large. Scales moderate, those above lateral line not 

 enlarged, their arrangement about as in H. sciurus. Dorsal spines rather 

 slender, the fourth 2^ in head; upper caudal lobe the longer, 11 in head; 

 longest anal rays 3 in head, their tips, when depressed, not extending 

 beyond last ray; second anal spine 2^ to 2f in head, reaching, when 

 depressed, rather beyond middle of last ray; ventrals If in head; pec- 

 torals 11, not reaching past ventrals. Color in life, pearly gray ; back and 

 sides with about 10 horizontal stripes of golden yellow, narrower than, 

 the interspaces of the ground color; snout above bluish-dusky; a dusky 

 stripe through eye from tip of snout to behind gill opening ; a well-defined 

 black area on back and caudal fin, bounded below by an almost straight 

 line from first dorsal spine to tip of lower caudal lobe ; middle part of both 

 caudal lobes black, the edges gray ; a black spot under angle of preo- 

 percle; mouth within very red; pectorals, ventrals, and anal gray, not 

 yellow; soft dorsal duskv along the base. West Indies; rather commo)i 



