438 BULLETIN 152 UNITED STATES NATIONAL MUSEUM 

 MICROPANOPE XANTUSn (Stimpson), new combination 



Plate 179, Figures 1-4. 



Xanthodes xantusii Stimpson, Ann. Lye. Nat. Hist. New York, vol. 10, 1871, 



p. 105 [15] (type-locality, Cape St. Lucas; type not extant), 

 Pilumnus beebei Boone, Zoologica, vol. 8, 1927, p. 219, text-fig. 80 (type- 

 locality, off Hood Island, Galapagos, station 54; cotypes in Mus. New York 

 Zool. Soc). 



Diagnosis. — Granulation of carapace mostly in lines. Frontal 

 lobes oblique. Five lateral teeth. Chelipeds coarsely granulate. 

 Three grooves on outer-upper surface of palm. 



Description. — Carapace smooth on its middle and posterior por- 

 tions but in front areolated and roughened with somewhat squami- 

 form granules and slight transverse crenulated ridges. Antero- 

 lateral margin armed with four teeth not including the angle of the 

 orbit between which and the next tooth there is a nearly straight, 

 granulate interspace. Front little projecting, bordered by a thin 

 lamella; median emargination a large V; outline of lobes concave, 

 forming a lobule on either side, the outer one smaller than the inner; 

 margin finely crenulate, an irregular line of fine granules close to the 

 edge, and further back a transverse line of coarse granules. Orbital 

 fissures little marked, ending in small emarginations separated by a 

 slightly convex edge; outer incision broad, V-shaped, followed by a 

 large tooth similar to that at the inner angle. Subhepatic region 

 irregularlj^ granulate, with one granule or cluster more prominent. 

 Basal article of antennae short, scarcely reaching front. 



Wrist and hand strongly granulate, with large and small granules, 

 on the whole outer surface. Carpus with a deep sulcus near and 

 parallel to the outer-distal margin; a rectangular inner angle and a 

 stout spinule below it. Hand with three longitudinal sulci, one on the 

 upper, and two on the outer surface. Smaller cheliped sparsely 

 short-setose. Legs setose and roughened above with stout spinules 

 on the merus and minute spinules and granules on the succeeding 

 articles. 



Measurements. — Male type, length of carapace 6.35 mm. (.25 inch), 

 width of same 8.9 mm. (0.35 inch). Male, length of carapace 6.6 

 mm., width of same 9, fronto-orbital width 5.4, width of front 2.8 

 mm. 



r^Range. — Cape St. Lucas, Lower Cahfomia, to Maria Madre Island, 

 Mexico; Galapagos Islands. 



Material examined. — Maria Madre Island, Mexico: March-May, 

 1927; Secretaria de Agricultura y Fomento, through A. L. Herrera; 

 if male (60785). E. part of bay; 5-8 meters; May 17, 1925; F. 

 Contreras; 3 females (62704), 1 male, 4 females (1 ovigerous), returned 

 to California Acad. Sci. 



Clarion Island, Mexico; Hanna and Jordan; 1 female; returned to 

 California Acad. Sci. 



