586 rnocEEDiNGS of the national museum. 



with four spines, bordered by smaller spines or spinules; the greatest 

 interval is between tlie second and the first or orbital ; below this space 

 may be seen a subhepatic spine, similar in character but less produced 

 than the marginal spines. Lower surface of carapace rough and 

 similar to the vipper. 



Meral Joints of chelipeds granulate on outer surface; margins armed 

 with spines and spinules, those of the upper surface increasing in si/e 

 distally. Carpi spinous. The upper and proximal half of the outer 

 surface of the palm of the larger cheliped is covered with stout spin- 

 ules, which have a tendency to form longitudinal rows and become 

 smaller and more granuliform toward the lower and distal margins; 

 the spinules cover the upper surface and extend a little on the inner 

 surface. Tlie smaller i)alm is roughened on the entire outer surface 

 with sidnules or spiniform granules; upper surface with two rows of 

 spines; inner face granulous, except near the lingers. Dactyli of both 

 chelipeds a little roughened near the base. Meral Joints of ambulatory 

 legs armed on the anterior margin with a row of slender spines; pos- 

 terior margin spinulous; carpal and propodal Joints armed above, 

 below, and anteriorly with a row of spines. Legs sparingly pubescent. 



IHmcufiions. — Male: Entiie length, 8.8 mm.; width, including spines, 

 12f) mm. 



Tijpes.— No. 2ir>82, U.S.N.M. Two males, off Cape St. Lucas, 31 

 fathoms, station 2829. 



63. PILUMNUS, species. 



One young specimen, undetermined, from Magdalena Bay, Lower 

 California, .")! fathoms, station 28.32. 



64. PII.UMNOIDES PERLATUS (Poeppig). 



llepatiix inrlaiiiH PoEi'i'iu, Arch. f. Niitur., 183G, II, I't. 1, p. 135, pi. iv, fig. 2. 

 rUumnoidvH jiciialiin Milnk-Edwakds and LiK'As, D'Orbigny's Voy. TAmcr. 

 MfiU]., 1X43, VI, Pt. 1, ]). 21; 1817, IX, pi. ix, fig. 1. 



Ott" the Kio de la Plata, 10.^ to 11^ fathoms, stations 27G4 to 2706: 

 Magellan Strait, 29.^ fathoms, station 2775. 



65. XANTHO GAUDICHAUDII Milne-Edwards. 



Xantho (landichaiidu Mii.nk-Edwahds, Hist. Nat. Crust., 1834, I, p. 396. 

 Port Otway, Magal lanes Territory, Chile. 



66. HOMALASPIS PLANA (Milne-Edwards). 



Xarilho phuins Milne-Kdwards, Hist. Nat. CniHt., 1834, I, p. 3!»7. 



IIomaUtsjiiH lAanuK A. Milnk-Edwaiids, Ann. Sci. Nat., 18G3, 4tb ser., XX, p. 279. 



Port Otway, Magallanes Territory, Chile. 



