carpus reaching beyond antennal scale, dactyl 

 short, distinctly bifurcate. 



Abdomen smooth; pleura of first five segments 

 rounded ; sixth segment about as long as fifth and 

 about two-thirds length of telson. Telson with 

 two pairs of small dorsal spines somewhat re- 

 moved from lateral margin, placed at one-third 

 and two-thirds length; six spines on posterior 

 margin placed in one row, intermediate spines 

 longest. Uropods broadly ovate, exopod with 

 outer margin ending in a tooth flanked medially 

 by a movable spine. 



Measurements. — Length of body: ovigerous fe- 

 male, 20 mm. 



Variations. — Specimens with a single rostral 

 tooth are young. 



Habitat. — Shallow water. 



Type locality. — Tortugas, Fla. 



Known range. — Bogue Sound, N.C. ; Tortugas, 

 Fla. 



Remarks. — Two specimens from North Caro- 

 lina were taken August 16, 1957, in a nighttime 

 surface plankton tow on flood tide near Beaufort 

 Inlet. Though these have intermediate spines on 

 the telson longer than the other terminal pairs, 

 they agree well with specimens of P. schmitti 

 from Tortugas. 



Periclimenaeus wilsoni (Hay) 



Figure 38 



Coralliocaris wilsoni Hay, 1917, p. 71. — Hay and Shore, 1918, 

 p. 394, text-fig. 13 ; pi. 27, fig. 8. 



Periclimenaeus wilsoni: Holthuls, 1951a, p. 103, pi. 31, figs. 

 a-m ; pi. 32, figs, b-c (rev.). 



.Recognition characters. — Rostrum nearly 

 straight or somewhat decurved, almost reaching 

 end of antennular peduncle ; upper margin some- 

 what convex, bearing 10 to 12 regularly spaced 

 teeth, first tooth directly over or immediately be- 

 hind orbital margin; lower margin straight or 

 concave, unarmed. Carapace smooth with only 

 an antennal spine placed close to acute lower 

 orbital angle; postorbital ridge paralleling orbit 

 indistinct; anterolateral angle somewhat ante- 

 riorly produced, broadly rounded. Eyes well 

 developed. Stylocerite of antennular peduncle 

 broad, short, and pointed, almost reaching middle 

 of basal article; outer margin of basal article 

 with a blunt angle near tip of stylocerite, concave 

 beyond angle, ending in a strong tooth; second 



Figure 38. — Periclimenaeus wilsoni (Hay). A, anterior 

 part of body in lateral view, X 11.5 ; B, antennule, X 

 9.5 ; C, antenna, X 9.5 ; D, first leg, X 9.5 ; B, smaller 

 second leg, X 9.5 ; P, larger second leg, X 4.5 ; G, third 

 leg, X 9.5; H, dactyl of third leg, X 56; I, telson in 

 dorsal view, X 17 (after Holthuis, 1951a). 



and third antennular articles about same size; 

 upper antennular flagellum with sis to nine fused 

 joints; free part of short ramus with two joints. 

 Antennal scale a little longer than antennal pe- 

 duncle; outer margin straight, ending in a small 

 spine; lamella broadest proximally. 



First legs with carpus and chela extending be- 

 yond tip of antennal scale ; chela rather thickset ; 

 fingers shorter than palm, unarmed ; carpus about 

 as long as merus. Second legs strong, unequal, 

 with part of carpus and chela extending beyond 

 tip of antennal scale. Larger second legs with 

 chela almost equal to bulk of body; fingers in- 

 wardly curved, somewhat less than half length 

 of palm; dactyl with upper margin convex, cut- 



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