DECAPOD CRUSTACEANS OF THE BEAUFORT, N. C, REGION. 44I 



Genus LOBOPILUMNUS A. Milne-Edwards. 



Lobopitumnus A. Milne-Edwards, 1880, p. 297. 

 Lobopilumnus agassizii (Stimpson). PI. xxxiv, fig. 5. 



Pilumnus agassizii Stimpson. 1871, p. 14.'. 

 Lobopilumnus pulchetlus A. Milne-Edwards.t 50, p. 299. 

 Lobopilumnus agassizii Rathbun. 1898, p. 269. 



Carapace convex, strongly nodose and granulate and pubescent everywhere except anteriorly; 

 front consisting of two large lobate masses deeply separated from each other and from the orbits; orbital 

 region with two fissures above and two very narrow ones below, the margin granulate; anterolateral 

 margin with three acute, triangular teeth. 



Chelipeds stout and heavy; carpus with forwardly directed granulate tubercles. Ambulatory legs 

 pubescent and hairy, their carpal and propodial articles with minute spines above. 



Length, i6 mm.; width, 21 mm. 



One female taken by the Fish Hawk in 13 fathoms at station 7326 represents this species in the 

 laboratory collection. 



Genus LEPTODIUS A. Milne-Edwards. 



Leptodius A. Milne-Edwards, 1863. p. 284. 



Leptodius agassizii A. Milne-Edwards. PI. xx.xiv, fig. 6. 



Leptodius agassizii A, Milne-Edwards, 1880. p. 270, pi. xlix. fig. 3. 



Carapace broad, suboval, flattened and finely granulate posteriorly, conspicuously sculptured 

 anteriorly, the regions lobulate and with coarse granules and fine scattered hairs along the front margin 

 of the lobules; frontal margin double, there being a transverse groove extending across from orbit to 

 orbit, both edges of the groove and the orbital margin granulate; of the five anterolateral teeth, the last 

 two or three only are well developed, sharp and tiu-ned forward, the second and sometimes the third are 

 triangular and obtuse and the first (the outer orbital angle) is represented by an elevated mass of granules. 



Meros of cheliped slightly sou-passing the carapace; carpus strong, with a sharp internal spine and 

 with many irregular, granulate rugte above; hands tmequal, the larger one with strong, bltmt-tipped 

 fingers, the smaller one with more slender, more acute and more conspicuously grooved fingers which 

 show a tendency to be spoon-shaped at the tips; in both hands the upper and outer surfaces are granu- 

 late and tuberculate, the tubercles being arranged in rows. Walking legs granulate and hairy. 



Color, after a short preservation in alcohol, light red, fingers black. 



Length of a male, 8 mm. ; width, 12 mm. 



Three small specimens of this crab were dredged by the Fish Hawk in 1915 in 16 fathoms on the 

 fishing banks off Beaufort Inlet. The species has already been collected off Cape Hatteras and at 

 various points farther south. All the Beaufort specimens have the last three anterolateral spines well 

 developed but a series in the United States National Museum from Pensacola, Florida, shows that in 

 larger individuals the number may be reduced to two. 



Genus RHITHROPANOPEUS Rathbun. 



Rkithropanopeus Rathbun, 1898, p. 273. 



Rhithropanopeus harrisii (Gould). PI. xxxv, fig. 5. 



Pilumnus harrisii Gould, 1841, p. 326; De Kay, 1844, p. 7. 



Panopeus harrisii S. I. Smith, 1873, p. 547; Kingsley, 1878-79, p. 319; Benedict and Rathbun. 1901, p. 37S, pi. xxl, fig. 2, 



pi. XXIV, fig. i6. 

 Rhithopanopeus harrisii Rathbun, 1900(b), p. 138; Sumner. 1911, p. 674; Fowler, 1912, p. 397, pi. 119-120. 



Carapace about three-foiulhs as long as wide, much less convex from side to side than from front 

 to back, sparsely pubescent toward the anterolateral angles, protogastric regions with two transverse 

 lines of granules, a similar line from one posterior lateral tooth to the other across the mesogastric 

 region: front almost straight, very slightly notched and with its margin grooved, so that, viewed from 

 in front, it appears to be double; postorbital angle and first anterolateral tooth completely coalesced; 

 the first and second developed teeth of about the same size and perhaps slightly larger than the last one. 



Chelipeds quite imequal and dissimilar, carpus not grooved above and with a moderately de- 

 veloped internal tooth; chels indistinctly costate above, the larger one with short thumb and strongly 



