CRUSTACEA XORTH PACIFIC EXPLORING EXPEDITION 6/ 



91. PILUMNUS FISSIFRONS Stimpson 



Plate VIII, Fig. 4 



Piluninus ftssifroiis Stimpson, Proc. Acad. Nat. Sci. Phila., x, p. 36 [33], 

 1858. 



Body and feet covered with a thick short pubescence, which rises 

 in transverse ridges or tufts on the anterior part of the carapax, 

 corresponding to the areolets. Carapax convex, proportion of length 

 to breadth in the male: 1:1.458; areolate toward the front and 

 antero-lateral margins. Surface beneath the pubescence smooth and 

 glossy. A prominent, sharp tubercle on the surface near the third 

 antero-lateral tooth ; and another, very small near the fifth or pos- 

 terior tooth. Antero-lateral margin five-toothed ; angle of orbit 

 sharply prominent ; a second tooth inferior, or subhepatic : posterior 

 three teeth acute and projecting. Front rather narrow, deeply 

 divided at the middle by an emargination or fissure ; lobes much 

 projecting, and rounded. Upper margin of orbit two-notched; 

 lower margin minutely denticulated, with the inner angle strongly 

 projecting and tooth-like. Hectognathopoda rather short and broad ; 

 their surface, as well as that of the neighboring regions, pubescent. 

 Chelopoda unequal ; carpus with ten or more small scattered tubercles 

 upon its upper surface ; hand sharply granulated above, the granules 

 not crowded, and mostly concealed by the pubescence ; below, smooth 

 and glossy. Dimensions of a male : Length of carapax, 0.32 ; 

 "breadth, 0.465 inch. 



Found at Port Jackson, Australia. 



92. PILUMNUS VERRUCOSIPES Stimpson 



Plate VIII, Fig. 5 



Pilumnus verriicosipcs Stimpson, Proc. Acad. Nat. Sci. Phila., x, p. 36 

 [34], 1858. 



Upper surface of body and feet minutely pubescent, with scattered 

 long clavate sctns, most conspicuous on the margins of the feet. 

 Carapax broad, proportion of length to breadth in the male, i : 1-37. 

 Surface toward the anterior margins somewhat areolate. A strong 

 protuberance on each side near the middle lateral tooth. Antero- 

 lateral margin with three projecting but obtuse teeth, besides the 

 angle of the orbit; and a protuberance on the subhepatic region, 

 some ways beneath the interval between the angle of the orbit and 

 the first of the three teeth. Front with a smooth and clean surface, 

 free from pubescence : it projects a little and is slightly einarginate 

 at the middle. Inferior margin of the orbit thick and protuberant, 



