face, and with margins cut into lanceolate or tri- 

 angular teeth fringed with fine hairs, much 

 stronger on outer than on inner side of articles; 

 hand with about nine teeth alternately large and 

 small; fingers stout, oblique. Walking legs of 

 moderate size, longest not exceeding merus of 

 cheliped. 



Abdomen of male with segments three to five 

 fused, sixth segment with a median spine. 



Measurements. — Carapace: male, length, 19 

 mm.; width, 28 mm. Length of cheliped, 60 mm. 



Color. — Eed somewhat mottled with gray; 

 fingers carmine, shading to black. 



Habitat. — The species has been reported from a 

 variety of bottoms ranging from coral to fine sand 

 and mud, but it has been taken most often from 

 muddy or sandy bottoms (Rathbun, 1925; 

 Holthuis, 1959). Shallow water to 60 fathoms. 



Type locality. — V Ocean indien [erroneous 

 locality]. 



Known range. — Off the three North Carolina 

 capes, Gulf of Mexico from Pensacola to southern 

 Florida, and off Campeche, Mexico; West Indies 

 to Bahia, Brazil. 



Remarks. — Hildebrand (1955) and Holthuis 

 (1959) added distributional extensions to Cam- 

 peche and Surinam. Ovigerous females have been 

 reported in May and June from Surinam 

 (Holthuis, 1959). They are known from North 

 Carolina in June, Florida in summer, and Cuba 

 in October (U.S. National Museum records). 



Parthenope (Platylambrus) pourtalesii (Stimpson) 



Figures 248, 252C 



Lambrus pourtalesii Stimpson, 1871a, p. 129. 

 Parthenope pourtalesii: Hay and Shore, 1918, p. 462, pi. 39, 

 fig. 6.— Rathbun, 1925, p. 521, pis. 182, 183, and 276 (rev.). 



Recognition characters. — Carapace broadly 

 ovate-triangular, convex; branchial regions rather 

 deeply separated from gastric, cardiac, and 

 hepatic regions. Posterolateral angle marked by 

 conspicuous laciniated spine located behind bulg- 

 ing curve of anterolateral margin; hepatic mar- 

 gin armed with a small but prominent spine. 

 Anterolateral margin behind cervical suture 

 armed with eight or nine teeth and spines, first 

 three or four shorter than remainder. Postero- 

 lateral margin with three or four unequal spines 

 in addition to large one on ridge; posterior mar- 

 gin with three large and several small spines. 

 Genera] surface of carapace pitted and eroded, 



Figure 248. — Parthenope (Platylambrus) pourtalesii 

 (Stimpson). Female in dorsal view, approximately 

 X 0.80 (after Smith, 1887). 



with granulated tubercles disposed as follows: 

 one gastric, one genital, two cardiac, two on 

 branchial ridge in line with lateral spine, and a 

 tendency to rows of tubercles on branchial re- 

 gions. Rostrum with a long, narrow, obtuse tooth 

 with a denticle on each side, a subacute basal 

 tooth, and below and outside this a short spine. 

 Supraorbital spine blunt, postorbital spine smaller 

 but somewhat sharper; upper side of emargina- 

 tion on eye spined. 



Chelipeds long, rough, armed with laciniated 

 teeth and spines on both margins; merus witli an 

 additional median row of spiniform tubercles on 

 upper surface: carpus with largest spine at inner 

 angle ; hand with an obsolete median row beneath. 

 Meri of walking legs spinulose, also carpus and 

 propodus of last pair; dactyls furred; a tubercle 

 on sternum at base of cheliped and each of legs 

 one to three. 



Abdomen with a large tubercle .in middle of 

 second to sixth abdominal segments and a conical 

 tubercle at extremity of segments two and three; 

 segments three to five fused in male. Lower sur- 

 face of body granulate and tuberculate. 



Measurements. — Carapace: male, length, 36 

 mm.; width, 47 mm. Length of cheliped, 122 mm. 

 Carapace: ovigerous female, length, 11 mm.; 

 width, 13 mm. 



Variations. — The species varies greatly in the 

 number and prominence of tubercles and teeth, 

 and in constriction and ornamentation of the 

 rostrum. The elevations of the carapace may bear 

 spines or tubercles. 



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FISH AND WILDLIFE SERVICE 



