3184 Bulletin 4.7, United States National Museum. 



than head; dorsal spines without filaments, the longest about 1.5 in depth 

 of body; space between dorsals about equal to orbit; soft rays of dorsal 

 and anal scarcely reaching base of caudal ; ventrals united, forming a cup- 

 shaped disk, only about two-fifths posterior edge free from belly; caudal 

 rounded. Scales very small, ctenoid, densely covering entire body except 

 a broad strip on belly ; posterior portion of nape with very fine scales ; 

 entire head naked.* 



Color: Dark brown or olivaceous on head, side, and back; under parts 

 pale; fins all' pale, the anal with a narrow darkish margin; caudal some- 

 what dark ; no dark vertical bars on body and none at base of pectoral ; no 

 H-shaped figure at base of caudal. 



This species is close to S. plumieri, from which it differs chiefly in the 

 color, the more complete squamation, the shorter pectoral, and the non- 

 filamentous character of the dorsal spines. 



Puerto Rico. A single specimen, 3.63 inches long, obtained in the Rio de 

 Caguitas at Caguas, January 9, 1899, by the U. S. Fish Commission expedi- 

 tion to Puerto Rico. (Named for the Rio de Caguitas, from which the type 

 was obtained.) 



Sicydium caguitQe, EVERMANN & MARSH, Kept. U. S. Fish Com. 1899 (Dec. 19, 1899), 355, 

 Rio de Caguitas, Caguas, P. R. (Type, Xo. 49364, U.S.N.M. Coll. Evennann & 

 Marsh.) 



Page 2230. After Gobius oceanicus, Pallas, insert: 



2558 (a). GOBIUS BAYAMOXENSIS, Evermann <fe Marsh. 



Head 4. 8; depth 6.4; eye 5; snout 3. 2; maxillary 1.8; mandible 1.9; inter- 

 orbital 7.6; preorbital 4. 6; scales 71-19, about 29 before dorsal: D. IV-14, 

 the longest spine about 0.7 in head, the longest ray 1.5: A. 15, the longest 

 ray 1.5; pectoral 1.1; ventrals 1.1; caudal very long and pointed. Body 

 very long and slender ; headlong; caudal peduncle long; mouth very large, 

 oblique; maxillary long, reaching past posterior border of orbit. 



Color as in G. oceanicus, which this species closely resembles. The smaller 

 (71 instead of 63 to 65), almost cycloid scales, the longer head, larger 

 mouth, longer maxillary, and the longer and more slender body are differ- 

 ences which we can not reconcile with the descriptions of that species or 

 with the numerous specimens of it which we have from Puerto Rico. 



Puerto Rico. Known only from the type, a specimen 9 inches long, ob- 

 tained in the San Juan market January 14, 1899, by the U. S. Fish Com- 

 mission expedition to Puerto Rico. It probably came from near the mouth 

 of the Bayamon River at Palo Seco, for which stream the species was 

 named. 



Gobius bayamonensis, EVERMAXN & MARSH, Kept. U. S. Fish Com. 1899 (Dec. 19, 1899), 

 355, Mouth of Bayamon River, Palo Seco, P. R. (Type, No. 49365, U.S.N.M.; coll. 

 Evermann & Marsh.) 



Page 2218. To the synonymy of Gobius soporator. add the following: 

 Gobitts arundelii, GARMAN, Proc. N. E. Zool. Club, 1,63, June 9, 1899, Clipperton Island. 

 (Type in M. C. Z.) 



