30 Records of the Indian Museum. [Vor. VII, 
specimen, the only known example of its sex, differs from the 
males in the following features :— 
I. The spine on the carapace at the posterior end of the 
intestinal region is blunt—little more than a tubercle-— 
and cannot be said to overhang the posterior margin. 
z. The lamelliform teeth which fringe the lateral and posterior 
margins of the carapace are much less conspicuous. 
3. The 4th—6th abdominal terga are fused and the sutures 
partially obliterated; but the telson isfreely movable. All 
the segments are covered with vesiculous granules and at 
the distal end of the sixth there is a blunt tubercle com- 
parable with that found in the male but by no means so 
evident. 
4. The coxal joints of all the legs are elevated on either 
side of the abdomen and form a thin outstanding crest. 
The close-set tubercles which cover both surfaces of the cheli- 
peds and the upper portions of the merus, carpus and propodus 
of the ambulatory legs are in both sexes much more conspicuous 
than is shown in plate v of the ‘“‘ Investigator’ Ilustrations. 
Tribe Brachygnatha. 
Family GONOPLACIDAE. 
Sub-family CARCINOPLACINAE. 
Psopheticus stridulans, Wood-Mason. 
Psopheticus stridulans, Alcock, 1899, p. 73; 1900, p. 309, and IU... 
Zool. Invest., Crust., pl. v, fig. 1. 
One specimen, a female with carapace II mm. in length, was 
found at St. 391. P. stridulans has, hitherto, only been recorded 
from the Andaman Sea and S. W. of the Great Nicobar. 
Family MAIIDAE. 
Sub-family INACHINAE. 
Physachaeus ctenurus, Alcock. 
Physachaeus ctenurus, Alcock, 1899, p. 40; Ill. Zool. Invest., 
Crust., pl. xviii, figs. 1—1b, and Doflein, 1904, p. 71, pl. xxiv, 
figs. 1—4, pl. xlii, figs. 1—7, pl. xlviii. 
Two males and one ovigerous female were obtained at St. 391. 
Sub-family PISINAE. 
Sphenocarcinus aurorae, Alcock. 
Sphenocarcinus aurorae, Alcock, 1899, p. 84. 
Twelve males and fifteen females (ten ovigerous) were 
obtained at St. 391. A drawing of this species, which has not 
hitherto been figured, will be found on pl. i, fig. Io. 
