74 B. N. PEACH ON SOME NEW CRUSTACEANS FROM THE 
cylindrical, and made up of seven segments which extend beyond the carapace, 
and at least five which are covered by it. These latter are mere rings, and 
become shorter and shorter anteriorly. All are articulated and movable. The 
uncovered segments increase in length posteriorly. The third segment from _ 
the end is much the deepest, whence the body tapers each way. The ventral 
margin of this segment always exhibits a deep notch as if a piece were cut out 
of it. The seventh segment is almost twice as long as any of the others, and 
has articulated with it a strong hastate telson which is about equal in length to 
itself. The telson is broad at the base, tapers rapidly for a short distance, and 
then, more gradually, to a fine point with a slight upward curve. It is orna- 
mented with at least five serrated flanges, a dorsal, a ventral, and two lateral 
ones on each side. The lateral flanges on the one side in part of their course 
are connected with each other at intervals, with buttresses or columns, so that 
a pattern is produced in the lateral groove. The telson is flanked by two 
other shorter conical spines, one on each side, which are also articulated to 
the last body-segment and striated longitudinally. Test, smooth or slightly 
wrinkled. Total length from 1 to 24 inches. 
Observations.—There is a considerable difference among the several speci- 
mens regarding the length and bluntness of the snout, and from none yet seen 
can the bivalve nature of the carapace be established. 
The species is named from a fancied resemblance of the individuals to scor- 
pions, not from any idea of immediate relationship. 
Ceratocaris elongatus, spec. nov. (Pl. VII. figs. 2 to 27). Carapace about one- 
fourth of the length of the body without the telson, produced into a long snout 
in front and suddenly deepens where the jaws are seen to show through, 
whence it is produced backwards into a rounded lobe which extends consider- 
ably beyond the medial line of the posterior margin. 
Jaws hollow and denticulated, and placed a little less than half-way from the 
tip of the snout to the posterior margin. They occur nearest the ventral side and 
sometimes project beyond the margin. Body-segments seven, uncovered and 
four or five covered by the carapace, all movable, the whole forming a cylin- 
drical body which swells backwards till the third segment from the tail is 
reached, whence it tapers backwards. This segment too has a similar notch to 
that observed on C. scorpioides, as in that species the segments are each one 
larger than its immediately preceding neighbour. The telson is nearly twice as 
long as the last abdominal segment, and is highly oramented. In addition to 
five plain flanges it has in the grooves on each side of the dorsal flange a row 
of minute bosses, which, when magnified, have the appearance of the pine- 
pattern so common on Indian shawls. Lateral spines not observed. Length, 
including telson, 44 to 8 inches. 
