Figure 34. — Leptochela serrator- 

 bita Bate. Uropods and telson 

 in dorsal view. 1 mm. indicated. 



Antennal spine small or absent. Antennular pe- 

 duncle reaching beyond middle of antennal scale. 



First two pairs of legs chelate; fingers a little 

 longer than palm, cutting edges pectinate. 



Abdomen with fourth and fifth segments 

 broadly carinate; sixth segment with an anterior 

 middorsal tubercle, a posterior spine either side 

 of middle and a prominent spine preceding each 

 posterolateral angle. Telson with an anterior 

 submedian pair of spines and three pairs of lateral 

 marginal spines, anterior lateral spines at anterior 

 fourth, second at middle, third near posterior 

 extremity; tip with three pairs of unequal spines 

 and two pairs of strong setae, all more or less 

 fimbriated. Exopod of uropod with a row of 

 spines along ventrolateral border, a long curved 

 spine at tip; endopods spiny near tip. 



Measurements. — Length of body : 21 mm. 



Habitat. — Known only from coastal and oc- 

 casionally estuarine waters, from surface to 23 

 fathoms (perhaps to 33 fathoms). 



Type locality.— St, Thomas, shallow water. 



Knoxon range.— Ne&r Beaufort Inlet, N.C.; 

 Charleston Harbor, S.C. ; Key West, Fla. ; Puerto 

 Rico, and Virgin Islands. 



Remarks.— This small shrimp has been taken 

 in May, July, October, and November in surface 

 plankton tows in Bogue Sound, near Beaufort 

 Inlet, N.C., on flood tides at night. The specimen 

 taken in May was ovigerous. Lunz (1939) col- 

 lected a specimen in July in South Carolina. 



42 



Family Palaemonidae 

 Caridea having first two pairs of legs chelate, 

 second pair usually larger than first, carpus of 

 second pair not subdivided. Rostrum usually 

 armed with teeth and not movable. Mandibles 

 usually with an incisor process (Holthuis, 1951a). 



KEY TO SUBFAMILIES IN THE CAROLINAS 



a. Posterior margin of telson with three pairs of spines 



Pontoniinae (p. 42). 



aa. Posterior margin of telson with two pairs of spines 



and two or more setae Palaemoninae (p. 50). 



Subfamily Pontoniinae 



Upper antennular flagellum with both rami 

 fused in basal part. Appendix masculina general- 

 ly present on second pleopod of male; appendix 

 interna on second pleopod of female. Pleurobranch 

 absent from third maxilliped. Posterior margin 

 of telson with three pairs of spines (Holthuis, 

 1951a). 



KEY TO GENERA AND SPECIES IN THE CAROLINAS 



(Holthuis, 1951a, modified) 

 a. All maxillipeds with well-developed exopods. 



b. Hepatic spine present Periclimenes (p. 42). 



c. Antennal spine absent ; dactyls of last three legs 



bifurcate P. longimiidatus (p. 42). 



cc. Antennal spine present ; dactyls of last three legs 



simple P. americanus (p. 43). 



bb. Hepatic spine absent, 

 c. Rostrum compressed, with distinct teeth 



Pcriclimenaeus (p. 45). 

 d. Antennal scale with no terminal tooth 



P. schmitti (p. 45 i. 

 dd. Antennal scale with terminal tooth 



P. irilsoni (p. 46). 

 cc. Rostrum depressed, with at most two small teeth 



near tip Pontonia (p. 47). 



d. Dorsal spines of telson small and rather incon- 

 spicuous P. domestica (p. 47). 



dd. Dorsal spines of telson well developed 



P. margarita (p. 48). 

 aa. Second and third maxillipeds without exopods 



Xeopontoiiides ieoufortenms (p. 49). 



Genus Periclimenes Costa, 1844 

 Subgenus Periclimenes Costa, 1844 



Holthuis, 1951a, p. 23, 26.— Hemming, 1958b, p. 159. 



Periclimenes (.Periclimenes) longicaudatus (Stimpson) 

 Figure 35 



Urocaris longirauilata Stimpson, 1860, p. 39. — Hay and Shore, 

 1918, p. 394, pi. 27, fig. 7. 



Periclimenes (Periclimenes) longicauilatus: Holthuis, 1951a, 

 p. 26, pi. 6, figs, a-m ; pi. 8, fig. m (rev.). 



Recognition characters. — Rostrum straight, 

 short, reaching to end of second or third article 



FISH AND WILDLIFE SERVICE 



