stylocerite terminating in two acuminate spines; 

 lateral spine longer. Antennal scale and second 

 article of antennular peduncle reaching same level 

 distally; scale evenly rounded medially, approxi- 

 mately three times longer than greatest width, 

 greatest width near base. Third maxilliped, when 

 extended, exceeding eyestalks. 



First legs scarcely extending to tip of antennal 

 scale. Second legs exceeding antennal scale by 

 full length of chelae; fingers of chelae pointed, 

 agape when closed. 



Telson with anterior pair of spines placed ap- 

 proximately at level of lateral prominences. 

 Uropods with exopods somewhat falciform, 

 curvature greatest distally. Telson with three 

 horny ridges at proximolateral corners ventrally, 

 and uropods with an interlocking horny eminence 

 on basal article dorsally. 



Measurements. — Length of body: ovigerous fe- 

 male, 27 mm. 



Color. — Body nearly transparent ; red and green 

 spots or flecks on eyestalks, antennules, and an- 

 tennae; green only on distal joints of third 

 maxillipeds; red only on basal articles of legs, 

 on first pleopods, at bases of all pleopods, and on 

 abdominal pleura and sterna; a conspicuous red 

 area on sixth abdominal segment distoventrally 

 and another around mouth. 



Habitat. — Often found on firm bars of sand 

 just offshore along open ocean in water 1 m. deep 

 (Pearse, Humm, and Wharton, 1942) ; surface to 

 5 fathoms. 



Type locality. — Eastern shore of Northampton 

 County, Va. 



Known range. — Northampton County, Va., to 

 St. Simons Island, Ga. ; Alligator Harbor, Fla., 

 to Horn Island, Miss. 



Remarks. — Ogyrides alphaerostris apparently 

 is more restricted to high-salinity waters than 

 O. limicola, for it has seldom been collected in 

 the sounds of North Carolina and then only near 

 inlets. Pearse, Humm, and Wharton (1942) de- 

 scribed burrowing habits of the species on sandy 

 bars and commented that members of the genus 

 are unusual in that they have long eyestalks like 

 Uca, yet are burrowers. Ogyrides alphaerostris 

 burrows forward (head first), using the third 

 maxillipeds and legs for digging and propulsion. 

 Sand is pushed upward and over the head, the 

 abdomen often being left ahove sand for a time, 



especially in ovigerous females. The fifth leg is 

 held high on the sides and stroked dorsally and 

 posteriorly, legs one to four are stroked laterally 

 and posteriorly, and the third maxillipeds moved 

 anteriorly and dorsally. The animals scrape food 

 from the antennae with setose mouth parts. 



Ovigerous females have been taken in July in 

 North Carolina, and in July and August in Florida 

 and Mississippi. The above authors imply that the 

 breeding season is extended through the summer 

 months. 



Family Hippolytidae 



Caridea with first two pairs of legs chelate, 

 first pair not much stronger than rest; carpus of 

 second pair of legs subdivided. Eyes well de- 

 veloped and not covered by carapace. Mandibles 

 usually deeply cleft. Second maxillipeds with a 

 very short dactyl. 



KEY TO GENERA AND SOME SPECIES IN THE 

 CAROLINAS 



a. Carpus of second legs with three to five joints, 

 b. Carpus of second legs with five joints 



Thor floridanus (p.76). 

 bb. Carpus of second legs with three joints. 



e. Series of small spines (five to nine) along an- 

 terior margin of carapace below eye 



Lat rentes (p. 78). 

 cc. Without series of small spines on anterior margin 

 below eye. 

 (1. Rostrum shorter than carapace proper, with 



spines above and below Hippolyte (p. 80). 



dd. Rostrum nearly twice length of carapace proper, 

 smooth above, serrate below 



Tozcuma cnrolinennc (p. 83). 



aa. Carpus of second legs with more than six joints 



(multiarticulate) Hippolysmata (p. 84). 



Genus Thor Kingsley, 1878 



Kingsley, 1878b, p. 94.^Hemming, 1958b. p. 161. 



Thor floridanus Kingsley 



Figure 62 



Thor floridanus Kingsley. 1878b, p. 95.— Verrill. 1922. p. 136, 

 pi. 35, figs. 2-2f ; pi. 41, fig. 1 ; pi. 46, figs. 2-2e ; pi. 47, figs. 4. 

 4a.— Holthuis, 1947, p. 47, 49 (rev.). 



Recognition characters. — Rostrum shorter than 

 eyes; dorsal margin with four or five teeth, first 

 tooth a little behind margin of orbit, distal tooth 

 near tip making tip appear bifid; ventral margin 

 unarmed. Carapace smooth, with prominent an- 

 tennal spine below orbit. Eyes well developed. 

 Antennules with basal article large; stylocerite 

 long, acute, reaching beyond tip of basal article 



76 



FISH AND WILDLIFE SERVICE 



