CETJSTACEA OF THE MEBGTJI ARCHIPELAGO. 211 



Dimensions of the larger specimen : — ■ 



millim. 

 Length of cephalothorax, the lateral frontal teeth 



included 27| 



Breadth of cephalothorax (= distance between the 



fourth or last antero-lateral teeth) 26| 



Distance between the acute internal angles of the 



upper orbital margins 8^ 



Distance between the first antero-lateral teeth .... I7i 

 Length of the hand , , 14| 



The smaller individual has a large sponge completely covering 

 its carapace. 



Genus Cexptodeomia, Stim^s. 



119. Cbtptodeomia, 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, Grray. 



The cephalothorax is scarcely broader than long, only 5^ millim. 

 long and 5g millim. broad. The upper surface is very convex 

 longitudinally 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- 

 gostomiaa region, a little below the orbits. Between this sub- 

 hepatic tooth and the tuberculiform external angle of the anterior 



14* 



