REPORT ON THE BRACHYURA. 
179 
Colour (in spirit) brownish-pink, the close short pubescence with which the carapace 
and limbs are covered, whitish. 
Adult $ . 
Lines. 
Millims. 
Length of carapace, nearly .... 
7 
14-5 
Greatest breadth of carapace, nearly . 
9 
18-5 
Length of a chelipede, .... 
15 
32 
Length of first ambulatory leg, 
14 
30 
Philippines, 18 fathoms, lat. 11° 37' 0" N., long. 123° 31' 0" E. (Station 208). Two 
males and a young female were collected. 
This species is distinguished from nearly all its Oriental congeners known to me 
by the presence of a spine at the distal end of the inferior margin of the merus-joint of 
the fifth ambulatory legs. It is allied in this particular to Neptunus sebse (Milne 
Edwards), 1 and several other American species, from which it is distinguished by the 
existence of two spines on the posterior margin of the merus of the chelipedes, the form 
of the frontal teeth, &c. 
It is also nearly allied to the Oriental Achelous whitei, A. Milne Edwards, 2 from which 
it is distinguished not merely by the longer epibranchial spine, but also by the different 
arrangement of the spines on the palm of the chelipedes, &c. 
c. Carapace as in the subgenus Amphitrite or even narrower ; lateral epibranchial 
spine no longer or very little longer than the preceding tooth of the 
antero-lateral margin. 
Subgenus Achelous, cle Haan. 
Achelous, de Haan, A. Milne Edwards, Archiv. Mus. Hist. Nat., vol. x. p. 340, 1861. 
To the species enumerated by A. Milne Edwards, the following is to be added : — 
Neptunus unispinosus, Miers. North Australia (Prince of Wales Channel,, 
Torres Strait). 
Neptunus ( Achelous ) ivhitei (A. Milne Edwards). 
Achelous whitei, A. Milne Edwards, Archiv. Mus. Hist. Nat., vol. x. p. 343, pi. xxxi. fig. 6, 
1861. 
South of New Guinea, 28 fathoms, lat. 9° 59' 0" S., long. 139° 42' 0" E. (Station 
188). A large series was collected. 
1 Vide A. Milne Edwards, Archiv. Mus. Hist. Nat., vol. x. p. 329, pi. xxviii. fig. 2, 1861. 
2 Tom. cit., p. 343, pi. xxxi. fig. 6, 1861. 
