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CRUSTACEA OF THE MERGUI ARCHIPELAGO. 211 
Dimensions of the larger specimen :— 
millim. 
Length of cephalothorax, the lateral frontal teeth 
EVENT CVEG le © edger ne Sto ole Ole Gye ee Palle 
Breadth of cephalothorax (distance between the 
fourth or last antero-lateral teeth) .......... 263 
Distance between the acute internal angles of the 
MeOMetOr pital MAPOMIS! 53. tints c ui. fie ee wk Cs 87 
Distance between the first antero-lateral teeth.... 174 
MmermesanOt Vine HANG (ou ede slew alecas Ms tne ole oe His 143 
The smaller individual has a large sponge completely covering 
its carapace. 
Genus CrypropRomia, Stimps. 
119. CRYPTODROMIA, sp. 
The collection contains a young female specimen of a Crypto- 
dromia, but I hesitate to refer it to any species. It was captured 
at King Island Bay, and appears to be allied to C. lateralis, Gray. 
The cephalothorax is scarcely broader than long, only 54 millim. 
long and 53 millim. broad. The upper surface is very convex 
- Jongitudinally as well as transversely, and is covered with a short 
pubescence; the upper surface, except the lateral portions of 
the cervical suture, presents no interregional grooves. ‘The 
epigastric lobes are, however, distinctly indicated. The front 
is rather prominent and three-toothed ; the mesial tooth is 
small, rounded, and deflexed, though distinctly visible when the 
carapace is looked at from above; the lateral teeth are triangular, 
obtuse, and directed horizontally forwards. The lateral teeth are 
separated by a concave margin from the less prominent, internal, 
orbital angles, which are dentiform and subacute. The exte nal 
angles of the orbits are also dentiform and subacute. A small 
subacute tubercle is situated on the upper surface of the hepatic 
region of the cephalothorax a short distance behind the dentiform 
external orbital angles. <A tubercle of this kind has not been 
described in C. lateralis. 
The antero-lateral margins are armed with three teeth, between 
the dentiform extra-orbital angles and the cervical suture ; the 
first tooth is truncate and placed on the subhepatic or ptery- 
gostomian region, a little below the orbits. Between this sub- 
hepatic tooth and the tuberculiform external angle of the anterior 
i4* 
