264 DR. J. G. DE MAN ON THE PODOPHTHALMOUS 
first sight from A. malabaricus, as described in the ‘ Fauna 
Japonica, by the absence of the longitudinal crests on the 
outer surface of the larger hand, and by the fingers of the 
smaller hand being comparatively shorter in proportion to the 
length of the palm. In Alpheus Kingsileyi, Miers, the fingers of 
the larger hand are nearly as jong as the palm, those of the 
smaller chelipede about twice as long as the palm, and the upper 
surface of the palm of the larger hand does not present the 
characteristic crests of A. brevirostris. 
A. brevirostris appears to inhabit the Indian Ocean, having 
been collected by Péron on the coast of New Holland and at 
Zanzibar by Peters, according to Dr. Hilgendorf, who, however, 
was wrong in referring it to de Haan’s A. malabaricus. 
I am more inclined to refer de Haan’s A. malabaricus to the 
malabaricus of Fabricius than the A. brevirostris, as that part of 
Fabricius’s description of his species, viz. “ palma minuta, digitis 
longissunis,” 1s much more applicable to the species which was 
described by de Haan than to A. brevirostris. Nevertheless I 
am not aware whether the species described in the ‘ Fauna Ja- 
ponica’ under the name of A. malabaricus really occurs in the 
Indian Seas. 
148. AtpHevs RAPAX (Labr.), de Haan. 
Alpheus rapax, de Haan, Fauna Japonica, Crustacea, p. 177, tab. xlv. 
fie, 2. 
A fine, nearly adult specimen was collected in King Island 
Bay. ' 
Though closely allied to the preceding species, A. rapax of 
the ‘Fauna Japonica’ may be distinguished from it by the 
following characters:—The rostrum, even in the adult, extends 
backwards to the middle of the carapace. The arms of both 
chelipedes are armed with an acute spine at their distal ends, 
both margins of the palm of the larger hand are entire (as 
may also be distinctly seen in de Haan’s figure), and the fingers 
of the smaller hand are somewhat longer in proportion to 
the palm, being twice and a half as long as the palm in the 
adult, whereas in A. brevirostris they measure only once and 
a half the length of the palm. J inally, it is not the first joint 
of the carpus of the legs of the second pair that is the longest 
