408 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



edge of front. This edge is divided into two sinuous granulate lobes, 

 the outer angle of which forms a distinct but inconspicuous lobule; 

 the front appears thick because it has a row of single granules a little 

 above and behind the true edge. Supraorbital notches minute and 

 not far apart. Outer orbital angle obtuse forming a low tooth scarcely 

 distinguishable from the truncate second tooth of the lateral margin, 

 which has a long, straight or slightly convex margin. Succeeding 

 notches short and narrow, more or less V-shaped, the V often ending 

 in a short linear fissure. Third and fourth teeth truncate, slightly 

 convex, the third a trifle shorter than or sometimes subequal to, the 

 fourth. Suborbital emargination of good size, lower margin of orbit 

 a little convex or nearly straight, separated by a 

 shallow V from the broad, low, triangular, inner tooth. 

 Subhepatic tubercle as a rule very little developed. 

 Chelipeds minutely granulate; no subdistal tooth 

 on merus; surface of carpus covered with fine granulate 

 rugae irregularly transverse, inner angle a very short 

 blunt tooth. Palms crossed by transverse rugae em- 

 phasized by intermediate rows of punctae larger than 

 'pANo^PEus~TRANs- ^^^ grauulcs. A strong tooth at base of major dactyl, 

 VERSUS, MALE whlch forms a narrow gape with its opposing finger. 

 larged^^after Both propodal fingers are nearly horizontal, their 

 Benedict and color runs back a little on the palm, less in female 



RaTHBUN ,r • 1 



than m male. 



Abdomen of male with third segment very little wider than second, 

 somewhat rounded or a little angled at outer ends; sixth segment 

 broader than long, terminal segment sub triangular, the tip broadly 

 arcuate. 



Measurements. — Male (16214), length of carapace 11.4, width of 

 same 17, fronto-orbital width 10, width of front 5.5 mm. 



Variations. — Stimpson says of this species, "Surface not uneven 

 near the antero-lateral teeth." Of the specimens before me this is 

 true of some but others have a deep groove leading inward from the 

 last two lateral notches. There is variability also in size of lateral 

 notches, in development of subhepatic tubercle, even on different 

 sides of one individual; and in prominence of granules on manus. 



In two specimens the major chela is underdeveloped, as not infre- 

 quently happens in Panopeids; in male No. 16214, which corresponds 

 most nearly to Stimpson's description, the major chela retains its 

 characteristic shape but is somewhat lower, and the basal tooth of the 

 dactylus is much reduced; in female No. 40425 not only is the major 

 chela considerably reduced but it has the shape of a minor chela 

 including the form and ornamentation of the fingers. 



Range. — West coast of Mexico (A. Milne Edwards); Salvador to 

 Peru. 



