Figure 46. — Leander tenuicoi-nis (Say). A, anterior part 

 of body of female in lateral view ; B, anterior part of 

 carapace of male in lateral view; C, antennule: D, 

 antennal scale: E, first leg: F, second leg: G. third leg: 

 II. fifth leg (after Holthuis, 1952). 



Eyes well developed, rounded; two dark-colored 

 bands visible on cornea, especially in fresh mate- 

 rial. Basal article of antennule with stylocerite 

 large and pointed, reaching beyond middle of 

 article, and with anterolateral spine reaching al- 

 most to end of second article of peduncle, anterior 

 margin of basal article between spine and second 

 article straight or only slightly convex; second 

 and third antennular articles shorter and narrower 

 than first; upper flagellum with fused portion of 

 rami shorter than free portion of shorter ramus. 

 Antennal scale 3 to 5 times longer than broad; 

 outer margin about straight; terminal tooth 

 strong, as long as lamella: antennal peduncle not 

 reaching middle of scale; a strong external spine 

 near base of scale- Mandible with :i two-jointed 

 palp. 



First pair of legs slender; reaching about to 

 end of scale; lingers longer than palm. Second 

 legs more robust than first, equal in size and 

 shape; chelae reaching beyond scale; linjrers 

 longer than slightly swollen palm, cutting edges 

 of fingers entire excepl Eoi small basal tooth in 

 males; carpus shorter than chela and about as 



long as merus. Last three legs slender, dactyls 

 simple, slender: propodi armed with posterior 

 spinules ; fifth leg more slender than third. 



Abdomen smooth; first three pleura broadly 

 rounded; pleura of fourth and fifth segments 

 narrower, ending in a minute, acute tooth. Sixth 

 segment slightly longer than fifth and about two- 

 thirds length of telson. Telson with two pairs of 

 dorsal spines, first pair at midlength, second at 

 three-fourths length; inner of two pairs of pos- 

 terior spines overreaching acute tip of telson, a 

 pair of strong feathered setae between inner pair 

 of spines. 



Measurements. — Length of body : 47 mm. ; 

 males generally smaller than females; ovigerous 

 females 26 mm. long have been reported 

 (Holthuis, 1952). 



Variations. — Length of the second legs is 

 variable, and the palm of the chela is more swollen 

 in some specimens than in others. Length of the 

 terminal tooth of the antennal scale is variable. 



Color. — Green or olive, with opaque spots 

 (Schmitt in Holthuis, 1052, for specimens from 

 Tortugas). 



Habitat. — Found in floating sargassum, on 

 wharf pilings, and among submerged vegetation. 



Type locality. — Newfoundland Banks. 



Known range. — Tropical and subtropical waters 

 all over world except for west coast of Americas; 

 Newfoundland Banks to Falkland Islands in 

 western Atlantic (Holthuis, 1952). 



Remarks. — Ovigerous females have been ob- 

 served from July to October in the Carolinas, in 

 June in the middle and western Atlantic (Sivert- 

 sen and Holthuis, 1956), and in August at Old 

 Providence Island (Schmitt, 1939). Gurney 

 (1939) described the fifth(?) larval and first 

 postlarval stages and compared them to related 

 forms, with remarks on the statocyst in adults. 



Genus Palaemonetes Heller, 1869 



Holthuis, 1952, p. 199. Hemming. 1958b, |> 158 



Subgenus Palaemonetes Heller 



Holthuis. 1952. p. 207. 



Palaemonetes (Palaemonetes) vulgaris (Say) 



Figure 47 



Palaemon oulgarit Say. 1S18, p. 248. 



Palaemonetes carolinut: Hay and Shore, 1918. p. 393. pi. 27, 



tig. 4. 



Palaemonete* (Palaemonetee) vulgaris: Holthuis. 19ri2. p. 231. 

 pi. 54, figs, f-1 (rev.). 



:,«» 



FISH AND WILDLIFE SERVICE 



