Genus Solenocera Lucas, 1849 



Burkenroad, 1934b, p. 64. — 1936, p. 120. — 1939, p. 6. 

 Solenocera atlantidis Burkenroad 

 Figure 5 

 Solenocera atlantidis Burkenroad, 1939, p. 10. 



Recognition characters. — Body compressed, car- 

 apace deeper than broad; integument thin, 

 smooth; sides of rostrum and area near base of 

 rostrum covered with short hairs; carapace with 

 small pterygostomian spine meeting frontal mar- 

 gin at right angle, spine sometimes doubled; 

 postorbital and hepatic spines well developed; 

 antennal angle acute, more or less toothlike, often 

 not greatly produced; orbital angle with a distinct 

 spine on margin; cervical groove reaching mid- 

 dorsal line; branchiocardiac groove prominent. 

 Kostrum not reaching distal edge of eye; lower 

 margin unarmed, convex; with five to seven, us- 

 ually six, dorsal teeth not counting dagger-shaped 

 tip, two behind, one above orbital margin, pos- 

 terior tooth slightly remote from others. Post- 

 rostral carina not continued beyond crossing of 

 cervical groove. Antennular flagella slender, about 

 half as long as body; lower flagellum broader than 

 upper at hollowed basal portion. Antennal scale 

 extending no more than one-tenth its length be- 

 yond antennular peduncle. 



Coxa of fifth legs with strong tooth on antero- 

 medial margin in both sexes. 



Abdomen with last three segments carinate; 

 third to fifth segments cleft posterodorsally at 

 midline; sixth segment with a spine at middorsal 

 posterior and posterolateral corners and a tooth- 

 like projection at middle of distolateral edge. 

 Telson short, broad, lateral spines large. Exopods 

 of uropods with no spine at distolateral corner. 



Measurements. — Length of body : large male, 

 37 mm. ; large female, 56 mm. 



Variations. — The epipodites are usually mitten- 

 shaped, but sometimes more distinctly forked, the 

 thumb or inferior branch never exceeding the 

 proximal or palmar portion of the blade, exclusive 

 of the peduncle. 



Color. — Orange red, color most concentrated as 

 bands across posterior parts of abdominal tergites 

 (Burkenroad, 1939). 



Habitat. — Mud, shell, and coral bottoms ; 10 to 

 180 fathoms. 



Type locality. — Gulf of Mexico off Alabama 

 (Atlantis station 2813, roughly lat. 30° N. long. 

 88° W.), 19 fathoms. 



Known range. — Cape Hatteras, N.C., to near 

 Campeche, Mexico; Surinam (Hildebrand, 1955; 

 Holthuis, 1959). 



Remarks. — Females with well-ripened ovaries 

 have been taken in March off Alabama (Burken- 

 road, 1939). 



Genus Hymenopenaeus Smith, 1882 



Burkenroad, 1936, p. 102. 

 Hymenopenaeus tropicalis (Bouvier) 

 Figures 6-7 



Parartemesia tropicalis Bouvier, 1905, p. 749. 



Haliporus tropicalis: Bouvier, 1906, p. 4. — Milne Edwards and 

 Bouvier, 1909, p. 247, pi. 3, figs. 1-9, text-figs. 45-54. 



Hymenopenaeus tropicalis: Burkenroad, 1936, p. 102. 



Solenocera weymouthi Lindner and Anderson, 1941, p. 181, 

 fig. 1. 



Recognition characters. — Body robust, laterally 

 compressed; integument thin, polished, except 

 finely setose at sides of rostrum and area near base 

 of rostrum; carapace deeper than broad with 

 antennal, hepatic, and postorbital spines well de- 

 veloped, a small stout spine on orbital margin; 

 cervical groove extending nearly to middorsal 

 line; branchiocardiac groove extending from near 

 anterolateral corner to level of base of first legs. 

 Bostral crest not extending beyond level of cervi- 

 cal groove, armed above with 7 to 10 teeth exclud- 

 ing rostral tip, posterior tooth slightly remote 

 from others; rostrum reaching about to distal 

 edge of eye, straight or slightly upturned at tip, 

 lower edge convex, unarmed, ciliated. Prosartema 

 prominent, hairy, extending to or beyond middle 

 of second segment of antennular peduncle. An- 

 tennular flagella somewhat flattened, upper ramus 

 about one-third diameter of lower at base. Anten- 

 nal flagella about three times body length. 



Female with projections on coxae of last three 

 pairs of legs, first pair posteromedial and blunt 

 pointed ; second pair medial, bladelike, with thin, 

 stylif orm posterior projection ; third pair medial, 

 broad, bladelike, partially covering thelycum. 

 Thelycum setose, posterior lateral lobes united; 

 middle lobes rounded, discrete; anterior lobes 

 closely approximated at midline, partially cov- 

 ered by coxal projections of fourth legs. 



Abdomen with middorsal carina low and faint 

 on third segment, progressively more prominent 



MARINE DECAPOD CRUSTACEANS OF THE CAROLINAS 



15 



