NO. 9 manning: Atlantic stomatopod Crustacea 19 



Material exaintned: 

 OREGON Sta. 2244; 08°12'N, 58°2rW; north of British Guiana; 



August 31, 1958; 31/39 fms; IS (UMML). 

 OREGON Sta. 2249; 07°40'N, 57°34'W; north of British Guiana; 



August 31, 1958; 30/27 fms; 2S 5, 9? ? (USNM). 

 OREGON Sta. 2250; 07°38'N, 57°34'W; north of Suriname; August 



31, 1958; 27/26 fms; 2$ $, 29 9 (USNM). 

 OREGON Sta. 2261 ; 07°20'N, 56°49'W; north of Suriname; Septem- 

 ber 1, 1958 ; 33 fms; 1 9 (UMML). 

 OREGON Sta. 2262; 07°18'N, 56°49'W; north of Suriname; Sep- 

 tember 1, 1958; 33/30 fms; 2S 5, 5 9 9 (UMML). 

 OREGON Sta. 2267; 06°58'N, 56°02'W; north of Suriname; Septem- 

 ber 2, 1958; 25 fms; 75 5, 29 9 (USNM). 

 OREGON Sta. 2276; 06°42'N, 55°37'W; north of Suriname; Septem- 

 ber 3, 1958 ; 23/22 fms; 1 S (USNM). 

 Measurernents: Males, 58.3 to 101.5 mm, total length; females, 

 82.7 to 1 14.3 mm, total length. 



Description : Eyes large, bilobed ; rostral plate elongate, without 

 carinae; median carina of carapace indistinct anteriorly, not bifur- 

 cate ; anterolateral spines of carapace not extending to rostral base ; 

 raptorial claw large, dactylus armed with six teeth, outer margin of 

 dactylus a simple curve; five epipods present; mandibular palp pres- 

 ent; lateral process of fifth thoracic somite convex anteriorly, directed 

 laterally; lateral processes of sixth and seventh thoracic somites con- 

 vex, apices acute, directed posteriorly; an inconspicuous tubercle pres- 

 ent anteriorly on the process of the sixth somite ; submedian carinae 

 present on last three thoracic and all abdominal somites; abdominal 

 carinae sharp, spined as follows: submedian, 5-6; intermediate, (2)3-6; 

 lateral, 1-6; marginal, 1-5; posterior margin of fifth abdominal somite 

 with 0-4 accessory spinules between the submedian and intermediate 

 carinae ; sixth abdominal somite with 0-5 accessory spinules ; telson 

 without prelateral lobes, with 10 supplementary carinae, some com- 

 plete, some broken, either side of crest; denticular formula 4-6, (7-8)9- 

 11, 1 ; basal prolongation of uropod with (7-8)9-12(13) fixed spines on 

 inner margin of inner spine; 7-8 movable spines on outer margin of 

 penultimate segment of outer branch. 



Discussion: As suggested by Holthuis (1959), S. rugosa pinensis 

 is not distinct from S. rugosa. The specimen from East Florida re- 

 ported by Manning (1959) under the subspecies is an undescribed spe- 

 cies. 



