CARIDEA. 543 



the margin in tufts ; moveable finger broad, thin above, much longer 

 than lower finger. Smaller hand narrow oblong, nearly linear, very 

 thin hairy, fingers half as long as hand, similar, terete, hairs on inner 

 margin not denser than on outer surface. Last joint of outer maxil- 

 lipeds long pilose. Carpus of third pair of feet having joint 1 as long 

 as 2 + 3+4; joint 2 and 5 equal; 3 and 4 equal, and together about 

 as long as the second ; hand as long as the two preceding, a very few 

 light hairs on the fingers. Following two pairs of feet rather slender, 

 third joint unarmed ; fifth with about five spines on inner margin 

 and a few hairs. 



A. Edwardsii, Audouin, Explic. des Planches de la Descr. de l'Egypte, par M. 

 Savigny, Crust., pi. 10, f. 1, p. 90. 



A. monopodium (?), Bosc, Crust., ii. pi. 13, f. 2, and p. 73. 



Var. leviusculus. — Plate 34, fig. 3 a, b, c, d, e, f, represent parts of a 

 specimen of the same or an allied species from Wakes Island, north 

 Pacific. The front, antennas, and legs are nearly as in the Edwardsii 

 The second basal joint of the inner antennae is, however, but little 

 longer than the first; the large hand is proportionally narrower, but 

 this is often a varying character in the same species ; the third and 

 fourth pairs of legs are more nearly naked. The first joint of the 

 carpus is hardly as long as the second and third. The differences 

 are so small that we doubt with regard to the species being distinct 

 from the Edwardsii. It is near the A. 2-incisus of De Haan (Faun. 

 Japon., p. 179, pi. 45, f. 3), which De Haan considers a variety of the 

 A. avarus of Fabricius. But in De Haan's figure, the base of the 

 outer antennae is not longer than the basal scale, and the rostrum is 

 trigonal between the eyes, with a flat surface and concave sides. 



Alpheus strenuus. 



Rostrum elongatum, acutum, superficie inter oculos leviter carinatd. 

 Squama antennarum externarum basalis bad non longior. Articulus 

 antennarum intemarum 2dus lmofere duplo longior. Pedes antwi 

 multo incequi, manus niajoris sinu infero-marginali concavo et non 

 triangulato, bracJiio ad apicem internum acute unidentato; manu 

 minore angusto-oblongd, paulo pubescente, digitis intus dense kirsutis, 



