BRACHYURA AND MACRURA OF HAWAIIAN ISLANDS. 
863 
Legs unarmed, thinly clothed with long and short hairs. 
Dimensions. — Female type, length 5.5, width 7 mm.; male, station 3848, length 4.5, width 6 mm. 
Distribution.— South coast of Molokai Island, 23 to 73 fathoms; stations 3847, 3848; Penguin Bank, 
27 to 29 fathoms, station 4032; vicinity of Modu Manu, 24 to 160 fathoms, stations 4150, 4160 (type 
locality), 4163. Cat. No. of type, 29551. 
This species is distinguished by its narrow form, and relative lack of armature, the four antero- 
lateral spines being the only sharp projections. 
Named for Prof. C. C. Nutting, who accompanied the Albatross to the Hawaiian Islands in 1902. 
Pilumnus acutifrons, sp. nov. 
Carapace narrow, seven-sided, smooth, slightly areolated, convex, with scattered tufts of hair. 
Frontal lobes deflexed, margin very oblique, subtruncate, finely granulate, separated by a large V, 
inner angles sharp, outer angles ill-defined and separated by a shallow furrow but no notch from the 
inconspicuous orbital angle. 
Upper orbital notches slight, a 
spine at outer angle; two spines on 
lower margin besides the one at the tip 
of the triangular inner lobe. 
Antero-lateral margin with three 
spines, two of which are larger than 
the one at the orbit and have broad 
bases and long slender tips, the last 
small and bifid at tip. 
Chelipeds very unequal in male, 
spinous; spines on upper margin of 
arm very irregular, the larger and 
more distal spines compound; lower 
margins and upper distal end of outer 
surface spinulous; wrist armed with 
about fourteen large curved spines, of 
which the one at the inner angle is the 
longer. The large hand is heavy and 
spinous only on the upper and proxi- 
mal portion of the outer face, remainder smooth, spines in rows and diminishing from above down- 
ward; small hand spinous on the whole outer face. Fingers stout, grooved in small chela, almost 
smooth in large one, dactyls spinulous proximally, fingers when closed leaving only a very narrow slit 
at base. 
Legs slender, armed above with long, rather distant spines, and below with spinules. Chelipeds 
and legs sparingly clothed with long hair. 
Dimensions. — Male type, length 3, width 3.8 mm. 
Tt/pe locality. — French Frigate Shoal, 17 to 17£ fathoms, station 3970; 1 male (Cat. No. 29543). 
This species has some resemblance to P. tahitensis de Man in the oblique lobes of the front and the 
scattered tufts of hair, but in our species the lobes are more oblique, the orbits and chelipeds are more 
spinous, the chelae of different shape. 
Pilumnus andersoni de Man. 
Fig. 23 . — Pilumnus acutifrons, type male, a, Dorsal view, x 6§. 6, Larger 
chela, x 5§. 
Pilumnus andersoni de Man, Jour. Linn. Soc. London, Zool., XXII, 1887, 59, pi. iii, figs. 5, 6. 
Alcock, Jour. Asiat. Soc. Bengal, LXVII, 1898, 194. Borradaile, Fauna & Geogr. Maidive & 
Laccadive Arch., I, 245, 1902. 
Vicinity of Laysan, 10 to 19 fathoms, station 3960, 2 females, much smaller than the types, the 
larger measuring only 6.2 mm. in width. They agree very well with de Man’s description, except 
that the outer orbital angle is sharper, in fact a spine, smaller, however, than the other antero-lateral 
spines. 
F. C. B. 1903, Pt. 3—7 
