58 
ZOOLOGY OF THE VOYAGE OE H.M.S. SAMARANG. • 
Carapace much wider than long, smooth, the lateral regions cup-shaped, with raised 
edges, with an anterior and posterior groove ; lateral edges divided into three lobes, the front 
lobe straight and reflexed backwards, the middle simple and rounded, the posterior elevated 
and wedge-shaped ; the middle region with a strong vertical ridge ending behind in an obtuse 
tubercle, and on each side with two perpendicular three-sided elevations, truncated at then- 
apices, with a small tubercle at their fore-bases ; posterior margin of carapace excavated, with 
a large projecting lobe flattened above, with two ridges behind, a rounded elevation in front, 
and numerous small tubercles near the base. 
Front entire, rounded, reflected backwards, showing a central groove on the under 
surface. 
Fore-legs with the third joint triangular, the edges tuberculiferous ; the fourth joint 
with two tubercular ridges on the upper surface ; fifth joint with a tubercular keel above ; 
claws slightly curved at the ends. 
Abdomen (of female) oval, tuberculated, seven-jointed, surrounded by an elevated ridge. 
It is interesting to see the analogous armature of the carapace with that of Xanthasia 
murigera (White) amongst the Pinnotheridce. The name Tlos is from the town of that name 
in Lycia, so well described by Sir Charles Fellowes in his Asia Minor. It is distinct enough 
from Tylos, another genus of Crustacea , so as not to be confounded with it in sound. 
1. TLOS MURIGER, Adams Sf White. (Tab. XIII. Tig. 2.) 
Thoraee kevi, regionibus lateralibus valde excavatis ; marginibus lateralibus trilobatis ; margine pos- 
terior excavato, lobo bicarinato multis parvis tuberculis ad basin. 
Hab. Bomeonem. 
Carapace smooth ; lateral regions deeply excavated ; side-margins with three lobes, hind 
margin excavated, a two-ridged lobe with numerous small tubercles at the base. 
Hab. Borneo. 
X. CORYSTIDiE. 
The genus Trichocera is not uncommon among the islands of the Philippine Archipelago, 
where it is found among the reefs concealed in the coral, or hiding under stones ; it has all 
the habits of the Xantlio group ; the Corgstes inhabits rather deep water, preferring the same 
localities as the Leucosice, which it likewise resembles in its habits ; a species of Gomeza was 
dredged by Mr. Cuming in the Philippines, but the other genera of this family do not 
appear to be found among the islands of the Eastern Seas. 
1. TRICHOCERA, He Haan. 
1. TRICHOCERA GIBBOSULA, BeEaan. 
Parva, pilosa, thoraee dilatato, brevi, setoso, tuberculato, tuberculis mediis planis quinque transversim 
dispositis ; lateribus 10-dentatis ; fronte 5-dentata. 
