OXYSTOMATOUS AND ALLIED CRABS OF AMERICA ^45 



with a similar projection from the posterior branchial protuberance, 

 and leaving a small dorsal cavity on either side of urogastric region. 

 Posterior margin thinner than anterior and lateral margins on 

 account of the deep excavation around cardiac region; intestinal 

 region faintly bilobed. Front elevated, thick, bimarginate, a deep 

 sinus across middle. Chelipeds somewhat cristate, forming a lobe 

 at distal end of manus. Ambulatory legs granulate and tuberculate. 

 Abdomen densely tuberculate; segments 3-5 only partially fused; 

 segment 6 wdth a sharp, backward-pointing spine at proximal end. 



Color. — In the middle pale red, remainder white (von Martens). 



Measurements. — Male (24519) length 6, width 7.5 mm.; female 

 (17853), length 10.3, width at middle of carapace 13.4 mm. 



i?a7i^e.— Beaufort fishing banks, North Carolina, to Barbados; 

 low tide to 125 fathoms. 



Material examined. — See table 45, page 147. 



SPELOEOPHORUS ELEVATUS Rathbnn 



Plate 39, Figures 7-9 



? Ebalia mamillosa Desbonne, MS., in Desbonne and Schramm, Crustaces cle la 

 Guadeloupe, etc., p. 54, 1867 (type locality, Guadeloupe; type perhaps not 

 extant) . 



Speloeophorus elevaius Rathbitn, Bull. Lab. Nat. Hist. State Univ. Iowa, vol. 



4, p. 290, pi. 3, fig. 1, 1898 (type locality, off Key West; type in Mus. 



5. U. L); Proc. U. S. Nat. Mus., vol. 21, p. 612, 1898. 



Diagnosis. — Carapace broader than long, narrower than in pontijer. 

 Two pairs of orifices of good size, narrowly separated. Carapace 

 highest near middle of branchial elevation. 



Description. — ^Carapace narrower and liigher than in S. pontifer; 

 the highest point is at middle of ridge defining inner and posterior 

 boundary of each branchial region. Hepatic region convex; ptery- 

 gostomian tooth stout, blunt. Branchial region with three lateral 

 lobes, one on anterolateral margin, the others on lateral margin, the 

 lobe at posterolateral angle much the largest and most produced. 

 The posterior orifices are each nearly as large as the cardiac lobe ; the 

 anterior orifices are each about half as large as the posterior and sep- 

 arated from them by narrow, cylindrical bridges; surface between 

 anterior openings much depressed. Outer surface of merus of cheliped 

 with stout, blunt lobes; palm swollen laterally, its outer margin thick 

 and smooth. Upper surface of crab covered with depressed granules 

 so crowded as to present a honeycomb structure; the more elevated 

 portions are in addition tuberculated. On the lower surface are manj^ 

 more tubercles, large and beadlike, tending to form on the abdomen 

 reticulating lines. Tubercles margining ambulatory legs acorn-shaped. 



Measurements. — Type female, length 9.7, width at posterolateral 

 angles 12 mm. 



Range. — From Florida Keys to Cape St. Roque, Brazil. 



Material examined. — See table 46, page 147. 



