44 THE BRACHYURA. 
Actaea cavipes (Dana). 
Pl. 1, Fig. 2. 
Actaea cavipes Alcock, 1898, 67, 147. 
Rangiroa Id.; beach; Sept. 21, 1899; 1 ¢. 
Fakarava, Paumotus ; shoal in lagoon; Oct. 11, 1899; 3 2. 
Fakarava; outer reef; Oct. 12, 1899; 2d, 1 2. 
Borabora Ids., Society Group; fringing reef; Nov. 17, 1899; 5 @, = juv 
Funafuti, Ellice Ids,; reef; Dec. 24,1899; 1¢,1 9. 
Tari-Tari Id.; shore, reef; Jan. 6, 1900; 2 ¢, 3 2. 
Daira perlata (Herbst). 
Daira perlata Alcock, 1900, 67, 155. 
Papeete, Tahiti; reef; Sept. 28, 1899; 3 juv. 
Xanthias lamarckii (Milne Edwards). 
Xanthodes lamarckii Alcock, 1898, 67, 157. 
Papeete, Tahiti; reef; Sept. 28, 1899; 13,1 2°. 
Fakarava Id., Paumotus; outer reef; Oct. 12, 1899; 1 3, 4 2 (1 ovig.), 
1 juv. 
Makemo, Paumotus; reef; Oct. 21, 1899; 22,29 
Borabora Id., Society Group; fringing reef; Nov. 17, 1899; 2 ¢, 2 9. 
Xanthias ponapensis, sp. nov. 
Pl. 7, Figs. 5,5. 
The carapace is almost smooth, punctate, microscopically granulous, 
granules more discernible along the antero-lateral margin. Orbital region 
marked off by a groove, gastric region and its subdivisions well delimited, 
otherwise the carapace is scarcely divided. Frontal lobes faintly sinuous, 
their outer angles rectangular, and separated from the orbit by a rectangula . 
notch. Antero-lateral margin thick; teeth four (besides the orbital angle), 
the first minute and distant from the orbit, the third most prominent. 
Chelipeds unequal, surface similar to that of the carapace ; merus roughly 
granulous above, wrist and hand smooth to the eye, the larger punctae of 
the hand arranged somewhat in longitudinal lines. Fingers stout, gaping at 
