22 8 PAPERS FROM TORTUGAS LABORATORY vol. xxxiv 



The collection contains 2 specimens, 18 and 21 mm. long. The general color 

 has faded to a yellowish straw color, and the crossbars to dark brown or nearly 

 black, remaining very distinct. 



West Indies and Florida. S. F. H. 



Gobiosoma longum Nichols 



This goby lives commensally with a shrimp that is common and tirelessly 

 burrows in the soft mud covering the bottom of deep holes in Bird Key flats. 

 Usually a single fish is found with one or perhaps two shrimps in a burrow. 

 Sometimes two fish, and in rare instances more than two, quarter themselves on 

 a pair of shrimp. In its indolence the fish is always quite the antithesis of the 

 crustacean. For long intervals it will rest near the mouth of a burrow without 

 moving. If "sitting" very near, it may even be pushed aside by the shrimp in its 

 coming and going. 



These gobies are not easy to catch. When alarmed they whip quickly out of 

 sight and cannot be driven out by squirting irritating chemicals into their hiding 

 places, and it is useless to attempt to thrust one's arm into their shelters, as under 

 the surface of the soft mud there is rasping coral scrap not easily moved. This 

 goby sometimes may be caught by creeping up cautiously without alarming it, 

 and from a distance of 2 yards or so pushing a rod into a burrow to block the 

 lower part. If the burrow is not blocked too near the surface, the fish will enter, 

 and then by probing it may be driven into a glass jar inverted over the mouth 

 of the pit. 



Basically sand-colored, translucent, countershaded in faint olive, with darker 

 bands of spots more rounded dorsally, more elongated vertically on sides or fused 

 to form large blotches; bands plainer in resting fish. 



The stomach of one specimen contained a small gastropod, 2 amphipods, and a 

 small oxyrhynchous crab. W. H. L. 



The collection contains 11 specimens, 45 to 80 mm. long. Recognized by its 

 extremely slender body, depth in standard length about 6.7 to 8.5, and by the 

 filamentous 1st dorsal spine, which reaches to or beyond origin of second dorsal. 



Dutch West Indies, Bermuda, and Florida. S. F. H. 



Risor Ginsburg 



Risor Ginsburg, Bull. Bingham Oceanog. Coll., vol. 4, art. 5, 1933, p. 56 (Garmannia 

 binghami Parr). 



Teeth in a single series, the anterior ones enlarged, movable, strongly curved 

 up and down respectively in upper and lower jaws. Lateral teeth moderate, 

 pointed, recurved at their tips. Lips fleshy. Scales ctenoid, restricted to the pos- 

 terior half of the body. W. H. L. 



Risor ruber (Rosen) 



Garmannia rubra Rosen, Acta Univ. Lund., Arsskr., vol. 7, 191 1, p. 50, figs. \a, \b — 



Bahamas. 

 "?Microgobius sp." Metzelaar, Trop. atl. Vissch., 1919, p. 138 — Curacao. 



