88 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 120 
figured by Forest and Guinot indicates clearly that they were dealing 
with a different species. Independently Crosnier (1962) came to the 
same conclusion after reference to Borradaile’s type and has re- 
described the present species. 
Apart from the pleopods, the following obvious features separate 
the present specimens from T. gatavakensis: Upper surface of cheliped 
covered with sharp tubercles instead of small oranules; three spines 
on inner side of upper surface of the hand of the cheliped, instead of 
two; and relatively shorter basal antennal joint with about four as | 
against six granules. 
WA 
Ficure 32.—Thalamita pilumnoides Borradaile, male, Tuamotus and Societies, Sta. 90a-57, 
Bredin: a, pleopod; b, abdomen. (Scales=a, 0.5 mm.; b, 1 mm.) 
The male abdomen (fig. 325) of the present specimen has the penul- 
timate segment much broader than long, and the sides are less sinuous: 
than in Crosnier’s figure. The ultimate segment is broader than. 
long in the present specimen, against as long as broad in Crosnier’s. 
The male pleopod is smoothly curved, with two conspicuous bristles | 
on the outer surface some distance behind the tip. In addition, near 
the tip there is a small spinule, and on the tip there are two bristles. | 
These additional structures are absent from Crosnier’s figure (1962, 
fig. 256). 
The male (5 mm.) from the Marianas has three anterolateral teeth 
instead of the usual four on each side. 
