I9g15.] J. R. HENDERSON: Hermit-Crabs from Chilka Lake. 29 
Ceenobita rugosus, Milne-Edwards. 
Alcock, p. 143, pl. xiv, fig. 3. 
Station 107, 8966/10. A small specimen in a Natica shell. 
Station 123, 8965/10. A small specimen. 
These specimens, which are evidently immature, as the 
carapace of the larger one measures only 10 mm. in length, 
appear to belong to this common Indo-Pacific species. They 
possess a stridulating organ composed of an oblique row of elon- 
gated parallel teeth, on the outer surface of the left palm, and 
the outer surface of the propodite of the third left leg is sepa- 
rated from the anterior surface by a distinct ridge. 
Coenobita cavipes, Stimpson. 
Alcock, p. 146, pl. xiv, fig. 1. 
= C. violascens, Heller, and C. compressus, Ortmann. 
Station 79, 8699/10. Three young specimens. 
Station 82, 8695/10. A number of young specimens, the 
largest of which is.a female with the carapace 14 mm. long. 
Station 95, 8697/10. A half-grown male. 
The lower part of the outer surface of the left palm is 
smooth, and as pointed out by Stimpson is mahogany coloured. 
This species is very common in the neighbourhood of the 
backwaters along the east coast of India, and is frequently 
found at some distance from the water. It is most active at 
night. 
