76 B. N. PEACH ON SOME NEW CRUSTACEANS FROM THE 
Anthrapalemon Etheridgii, spec. nov. (Pl. VIII. figs. 3 to 3g; spec. char.). 
Carapace subovate, narrowest in front, and separated into two unequal areas by 
the cervical fold. It is strengthened by a marginal thickening, and produced 
anteriorly into a long serrated rostrum. The posterior angles are rounded, and 
the posterior margin slightly concave. It is further ornamented with five ridges, 
a central one which extends back from the apex of the V-shaped cervical fold 
to the posterior margin. In front of the cervical fold it is continued forward 
into the rostrum. On each side of this there is another ridge passing back to 
the cervical groove but not reaching the posterior margin. On the area in front 
each is continued as two oblong bosses placed upon a low mammiform pro- 
tuberance. These are the supports of spines with which the three already 
mentioned ridges were furnished. The remaining two ridges run almost 
parallel with the lateral margins, but are not found in front of the cervical 
groove. Unlike the rest, these bear no traces of spines nor crenulations. 
The rostrum, which is strong and conical, and about one-third of the length 
of the carapace, is ornamented with a central toothed crest and two lateral ser- 
rated flanges, and ends in a sharp point which is slightly bent upwards. 
The eyes are large, reniform, and pedunculated, and placed at the angles 
made by the rostrum with the carapace which are rounded off into sockets. 
The antennules are two, each made up of a propodite of at least three 
joints, broad, and horizontally flattened at the base and tapering forward. The 
last joint of each supports a pair of short tapering many-jointed sete. The 
antennee consist of a jomted propodite on each side, which supports a broad 
denticulated and corrugated basal scale. It also supports a long many-ringed 
lash, which seems thick at its base compared with the size of the animal. 
The walking limbs, which appear to be five on each side, are stout and 
somewhat flattened laterally and directed forward. From what can be seen, 
they are made up of precisely the same elements as an ordinary monodactylate 
limb of a recent macrurous decapod. There is no evidence of any chelate limb. 
The abdomen consists of six segments irrespective of the telson. The first 
two are narrow and highly facetted, allowing of a great deal of play in the 
joints. Seen from above the unfacetted part is very narrow, but it widens out 
laterally till past the pivots, when it expands into broad and rounded pleure. 
Those of the second segment overlap those of the adjoining ones both ways. 
Behind this the pleure are pointed, and overlap those of the succeeding seg- 
ment. The third segment is also highly facetted, but is very much broader 
than any other of the abdominal rings. It is divided down the centre of the 
tergum by a depression in which rises a narrow ridge. The fourth and fifth 
are broad, but not divided medially. The sixth has a central ridge, which is 
continued into the telson. On each side it has a joint articulated with it, each 
of which supports a pair of expanded and rounded fin-like appendages, 
OO  , EE EE 
