38 THE BR ACHY UK A. 



Platypodia anaglypta (Heller). 



Lophactaea anaglypta Alcock, 1898, 67, 102. 



Fakarava, Paumotus ; shoal in lagoon ; Oct. 11, 1899 ; 1 9. 

 Fakarava, Paumotus; outer reef; Oct. 12, 1899 ; 1 9. 



Platypodia digitalis, sp. nov. 



PI. 1, Fig. 6 ; PI. 9, Figs. 4, 4a. 



Carapace narrower than in most Indo-Pacific species of this genus. Inter- 

 regional furrows filled with a short tomentum; a few long hairs scattered 

 on the carapace. Granules of surface small, scabrous, and sparsely distrib- 

 uted. Surface behind middle of cardiac region smooth. A median furrow 

 forms two lobules on the broad part of the mesogastric area ; protogastric 

 area without longitudinal division. A thin, light-colored rim borders the 

 front, orbits, and antero-lateral margins, and is marked by a closed fissure 

 on the median line, two on the orbit and three on the sides. 



Chelipeds heavy, unequal. Outer surface of palms covered with sharp 

 tubercles arranged somewhat in rows ; upper edge not cristate, but armed 

 with 5 or 6 tubercles. Fingers very short and stout ; pollex shorter than 

 its width at base ; tips very stumpy in the large claw, slenderer and more 

 acute in the small claw ; prehensile edges of both fingers with a broad tooth ; 

 inner and outer surfaces with one or two tufts of hair. On account of the 

 short thumb, the movable finger is more vertical than commonly in the 

 genus. 



Ambulatory legs of moderate width, upper edges acute, but not cristate. 



Dimensions : — Adult 9, length 8.4 mm., width 11.5 mm. 



Distribution : — 



Papeete, Tahiti; reef; Nov. 28, 1899; 1 9. 



Kusaie, Carolines; 1900; 1 9 type (Cat. No. 32,846, U. S. N. M.). 



This species belongs to the granulosa group of Alcock (1898, 67, 100), in 

 which the upper border of the hand is not cristate, but P. digitalis is sepa- 

 rated from others of the group by having the pollex broader than long, the 

 protogastric lobes not longitudinally divided, the ambulatory legs not cristate. 



ZosimilS aeneilS (Linnaeus). 

 Zozymus aeneus Alcock, 1898, 67, 104. 

 Makemo Id., Paumotus; Oct. 20, 1899; 1 9. 



