NO. 1307. JAPANESE STALK-EYED CRUSTACEANS— RATIIBUN. ^ 33 



sides' gradually converging and slightly convex, extremity truncate, 

 save for a small median tu])ercle. 



The eyes reach half the length of the rostrum. The second segment 

 of the outer antennsv has a bispinose outer crest, one spine i)ointing 

 forward, the other backward. The acicle is much broader than its 

 axial length; its distal margin (which is directed obli({uel3') is concave. 



In the left cheliped (the right is missing), the basis and ischium are 

 tul)erculous below; merus tricarinate, the inner carina cut into 4 irreg- 

 ular teeth, and continuing a similar carina on the ischium; the upper, 

 surface of the carpus is rough, the inner margin and angle laminar, 

 the outer carina blunt, a blunt tooth at lower distal angle. Palm and 

 fingers tuberculous inside and out, a sharp carina on upper surface of 

 palm, ending distallv in an acute conical tooth, a blunt carina on lower 

 nmrgin of propodus. Fingers considerably longer than upper margin 

 of palm, almost meeting when closed, dactylus carinated above, carina 

 ending proximally in a lobe. The ischium of the ambulatory legs is 

 provided with a tooth on the posterior distal angle of the upper mar- 

 gin, this tooth increasing in size from the first to the third pair. Mar- 

 gins of succeeding joints broadh" laminate; the meri with 1 superior 

 and 2 inferior lamina^, carpi with 1 superior, propodi and dactyli with 

 1 superior and 1 inferior. The legs in a natural position are concealed, 

 but when extended, the last and half of the penult segment reach bej'ond 

 the carapace. 



The length of the abdomen exceeds by a small particle its width at 

 base. The first segment is verj^ short, almost linear; its width is less 

 than half the width of the second. The second has a median suture 

 and each half is ventralh' concave. The sutures between the lateral 

 plates alternate with those between the segments. The third to sixth 

 segments, inclusive, taken together are concave; the third is narrow 

 and transversely sulcate. 



Family PAGUfilD.E. 



DARDANUS Paulson. 



I'uauiUH Fabricius, Syst. Entom., 1775, p. 410 (part). — Stimpson. IVoc Acad. 



" Nat. Sci. Phila., X, 1858, p. 23.3 [71]. 

 Davdanvs Paulson, Crust. Red Sea, 1875, p. 90. 

 Pcujurkt^ Benedict, Bull. U. 8. Fish Comm. for 1900, II, 1901, p. 141. 



/^i/r(/a)w>>. a genus made by Paulson for Paguriis depr^essus Heller, 

 is shown by Kossmann" not to differ from Pagunis (so called). The 

 name Dardanus is therefore available in place of Pac/urias Benedict, 

 tlic name Pagurvj^ having been transferred to the group called Eupa- 

 ilHi'ua b}" Brandt. 



"Zool. Ergeb. Keise Kothen Meeres, 1877, \^. 70, 

 Proc. N. M. vol. XXVI— 02 3 



