WILLIAMS: DECAPOD AND EUPHAUSIID CRUSTACEANS 



83 31 



30 81 



80 29 



79 



28 78 



V 



\ ^ A 



/ 



\ 



■\K 



78 

 27 



79 



y 26 



25 

 80 



85 



27 84 



83 26 



82 



25 81 



Figure 2. — Florida peninsula including continental platform showing slope localities from which species listed 

 in Table 1 were collected. Base map adapted from Uchupi (1965). Contours in m; dotted = 100, dashed = 200, 

 solid = 1.000. 



Some of the more obvious differences for the 

 Veatch Canyon material are: Rostrum relatively 

 shorter in relation to basal antennal article. Dor- 

 sal spines of telson more distally positioned, ante- 

 rior pair at about midlength of telson but subject 

 to some variation. Antennal scale with distal 

 spine exceeding antennular peduncle. Major 

 chela of mature male missing, but juvenile with 

 fingers bent mesad; dactyl moderately arched in 

 profile and greatly overreaching fixed finger, 

 somewhat twisted, compressed proximally and 

 dorsally producing thin dorsal margin, external 

 surface somewhat concave, occlusive surface 

 lacking plunger but broadened and strongly calci- 

 fied distally, fitted to obliquely flattened occlu- 

 sive surface of fixed finger lacking socket but 

 provided with small stout tooth on mesial sur- 

 face; palm with obsolescent dorsal and ventral 

 notches. 



In the Florida material, the differences are: 

 Chela relatively stout, fingers stout and thick, 

 dactyl opening and closing in oblique plane, tip 

 rounded, bearing short plunger fitting into shal- 

 low socket on occlusive surface of fixed finger, 

 latter with 2 short spines on mesial surface; palm 

 with shallow notch on dorsal margin and slight 



offset on ventral margin, outer surface smooth 

 but base of dactyl flanked by distodorsal groove 

 and longer mesial groove. Second pleopod of male 

 with appendix masculina exceeding appendix in- 

 terna. Uropodal exopod with lateral margin end- 

 ing in single sharp tooth and rather long, uncol- 

 ored movable spine; endopod lacking distal spines 

 but bearing subterminal tuft of setae on dorsal 

 surface. 



Alpheus amblyonyx is distributed from Quin- 

 tana Roo (type locality, Bahia de la Ascen- 

 sion), Yucatan Peninsula, Mexico, to Puerto Rico, 

 Saint Thomas and Dominica; sublittoral (Chace 

 1972). 



Family Hippolytidae 



Three small shrimps, two males and one female 

 from JSL 1673 in the Gulf of Mexico off Florida, 

 represent an undescribed species resembling 

 members of the genus Ligur Sarato, 1885 from 

 the western Mediterranean and Indo-Pacific re- 

 gion (see Holthuis 1947, 1955). The specimens 

 were associated with burrow systems of the blue- 

 line tilefish, Caulolatilus microps Goode and 

 Bean. 



73 



