1916. | S. Kempe: Notes on Crustacea Decapoda. 377 
there is a marked difference between the two in the sculpture of 
the second abdominal somite. In A. propensalata, on either side 
of the middle line, there is a broad sinuous ridge which extends 
obliquely throughout the length of the somite. In A. pennata 
this ridge is broken in two by a deep vertical furrow. 
Dr. Calman has kindly sent me the following notes regarding 
the types obtained by the ‘ Challenger ’—‘‘ The three specimens 
of P. pennata differ among themselves in the form of the rostrum 
and other characters. In two specimens the rostrum is relatively 
short, bifid at tip, and with the lateral spines as large as in A. 
medium, In the third specimen the rostrum is longer, sharp-point- 
ed, and with very small lateral spines. In this last specimen also 
there is a tendency towards a softening of the inequalities of the 
general surface, 7.2. the keels and ridges are not so prominent. 
In particular the two lobules on either side of the median carina of 
the second abdominal somite are not sharply defined, although 
the vertical furrow separating them is distinct.”’ 
The following records of occurrence in Indian waters may be 
added to those given by Alcock :— 
4941 Persian Gulf, 26°20’30" N., 54°52/30" E., 
10 

35 fms, = a: .. ‘Investigator’ Five. 
4400 Persian Gulf, 26°33’ N.. AY 19h 
40 fms. z =< One. 
5874-8 Arabian Sea, 24) 936!s0" ING; 66°35)50" Eo 
5s fms. : , Seven. 
o127 Geer idel coast, 14°25! N., 80°1s!/45” 
Peron tinise ae sah aa » Two. 
1707-8 2037-9 
enhs-2o8 “2187-09 | Ganjam coast, 26-93 fms. e Twenty-two. 
160-2 28 mi. S.W. of Puri, Orissa, 25 fms. ee ch Three 
6256 Off Gangetic delta, 20°18’ N., go°s50' E., 
65 fms. 7 One. 
9126 Off Tennasserim coast, 1327/30" N., 
07°37) Eee 50 ims: he s Two. 
S200 <@it Cheduba, Arakan coast, 20 fms. ... A One. 
According to the labels the individual from the neighbourhood 
of the Gangetic delta was “‘ grey, touched with dark brown and 
green marks’’, while some of those from the Ganjam coast were 
irregularly banded with lichen green and mottled pink. 
On the Indian coasts A. pennata is evidently common ; it has 
been found at depths ranging from 12 to 93 fathoms. The type 
specimens were obtained by the ‘Challenger’ in the Arafura Sea, 
south of New Guinea, 8° 56’S., 136° 5’ E., at a depth of 49 fathoms. 
Balss, under the name A. obsoletum, records numerous specimens 
from Japan from depths of 80 to 150 metres. The species is ap- 
parently one of wide Indo-pacific distribution. 
Aegeon propensalata (Bate). 
1888. Pontocaris propensalata, Bate, Rep. ‘ Challenger’ Macrura, p. 460, 
ploxe Hiss 25a pl ikea tions. 
1895. Pontocaris progensalata, Ortmann, Proc. Acad. Sci. Philadelphia, 
Polis: 
