86 
ZOOLOGY OF THE VOYAGE OE H.M.S. SAMARANG. 
in medio crassis obtusis tuberculiformibus processibus, postice desinentibus in longa prominente acumi- 
nate spina extrorsum et paululum retrorsum clirecta ; acie posteriore octo validis spinis instructs, maxginibus 
thoracis, cum tuberculis et spinis, iimbriatis longis rigidis subcurvatis setis. 
Fronts acuminate triangulari, aciebus subcrenulatis et valida spina supra cantbum. 
Chelis ter thorace longioribus ; brachiis serie crebrorum mquorum tuberculorum antice ; quatuor vel 
quinque rnagnis rotundatis tuberculis, paululum inter sc distantibus in latere exteriore, quinque validis 
spinosis processibus a margine posteriore retrorsum et extrorsum tendentibus ; carpo serie tuberculorum 
supra, et tribus validis spinis externe ; manu crista octo validarum spinarum supra, serie tuberculorum 
interne, et serie fere duodecim crassarum obtusarum spinarum in acie inferiore. 
Pedibus posterioribus gracilibus minoribus, duobus posterioribus paribus longis subcurvatis setis 
fimbriatis. 
Aldomine (in mare) quinquarticulato, crebris setis circum margines. 
Hab. Maria Orientalia. 
Carapace subtriangular, anteriorly acuminate, somewhat angulated at the sides, wide 
behind, covered with rounded equal-sized tubercles, larger in the middle and branchial regions, 
the sides anteriorly crenated, armed in the middle with thick, obtuse, tuberculiform processes, 
and ending posteriorly in a long, prominent, acuminated spine, directed outwards and a 
little backwards ; posterior edge with eight strong spines and tubercles, the spines fringed 
with long, rigid, slightly curved hairs. 
Front acuminately triangular, the edges subcrenulated, and with a strong spine above 
the orbit. 
Fore-legs three times longer than the carapace, the third joint with a row of equal-sized 
tubercles anteriorly ; four or five large rounded tubercles slightly separated from each other 
on the outer surface ; five strong spiny processes, extending backwards and outwards from 
the hinder margin ; the third joint with a row of tubercles above and three strong spines 
externally ; the fifth joint with a crest of strong spines above, a row of tubercles internally, 
and a row of about twelve thick, obtuse spines on the lower sharp edge. 
Hind-legs slender, rather small, the two posterior fringed with long slightly curved setae. 
Abdomen (in the male) five-jointed, the crenated margins beset with short hairs. 
Hab. Eastern Seas. 
IV. CANCERID^E. 
In their habits, the Canceridce are evasive and prone to concealment, passive in defence, 
and though voracious and predatory, they do not exhibit the same activity, intelligence, and 
cunning as the Ocypodidce, the Gonoplacidce, or the Gr apsides. The (Ethres inhabit deep 
water, living in sandy mud, among shells and coral debris, while such genera as Carpilius, 
Atergatis, Xantho, and Chlorodius, select shallow waters along the shores, preferring weedy 
and rocky bottoms, where they hide among the stones, and prey on shrimps and small fishes. 
Pihmnus and Trapezia are tolerably lively in their movements ; the latter genus having the 
