112 "ENDEAVOUR" SCIENTIFIC RESULTS. 



PlLUMNUS DIGITA1/IS, Sp. 710-1'. 6 



(Plate xxii.) 



Type-locality. South 29 east of Pine Peak, Queens- 

 land; E.6486; one male, holotype. Length of carapace 9, 

 width 12, width of front 4.8, distance between outer angles 

 of orbits 9, length of penultimate leg 16.8 mm. 



Additional locality. Eleven to fourteen miles north- 

 west of Pine Peak, Queensland, 24-26 fathoms; E.3188; 

 one male. 



This species belongs to the group of P. trichophofus 7 de 

 Man, P. trichophoroides* de Man and P. Iborradailei^ Rath- 

 bun. Like them it has the posterior half of the carapace 

 flat, the surface of body and legs almost entirely covered 

 with a coat of short hair, while fringes of long hair 

 ornament the anterior third of the carapace, and also the 

 chelipeds and legs. The new species has a narrower cara- 

 pace, its length just three-fourths of its width ; the fronto- 

 orbital distance is greater in proportion to width of cara- 

 pace ; the regions are mostly well defined, the mesogastric, 

 protogastric, frontal, cardiac, anterior branchial and 

 posterior branchial ; while a furrow sets off the narrow 

 marginal rim of the front, the wider, inner margin of the 

 orbit, the posterior margin, and partially circumscribes an 

 inner branchial areole. The outer of the two emargina- 

 tions of the upper orbital margin is much the larger and 

 helps to define the dentiform outer angle, which is more 

 acute than the three succeeding blunt teeth of the aiitero- 

 lateral margin of the carapace. The transversely oblique 

 ridge leading inward and forward from near the hinder 

 part of the posterior tooth is pronounced and granulate. A 

 similar ridge is subparallel to the antero-lateral margin, 

 and runs from the gastric region to a point opposite the 

 third tooth. 



c It should be noted that, in drawing the different species of 

 Pihimnus, the carapace has been inclined so as to represent the true 

 edge of the front, even though that edge is invisible in a strictly dorsal 

 view. 



7 de Man Zool. Jahrb., Syst., viii., 1895, p. 544; ix., 1896, pl.xiii., 

 figs. 7-7e. 



8 de Man Op. fit., p. 549, pi. xiii. , figs. 8a-8e. 



9 Rathbun Proc. Biol. Soc. Washington, xxii., 1909, p. 113. 



