260 DE. J. G. DE MAJ!f ON THE PODOPHTHALMOUS 



The last pair of legs of this species are very characteristic, 

 and more resemble those of the proper Gehice, the propodites 

 being slender and not compressed. They are, moreover, sub- 

 cheliform, the inferior margin of each propodite being pro- 

 longed into an acute immobile finger, which, however, is much 

 shorter than the dactylopodite. Their somewhat thickened 

 meropodites are even a little shorter than each of the two fol- 

 lowing joints, and the carpopodites are nearly as long as the 

 propodites, whereas they are almost twice as long as the latter 

 in Cr. Darwinii. The dactylopodites measure nearly half the 

 length of the propodites. The meropodites, carpopodites, and 

 propodites of these legs are a little curved ; the meropodites are 

 glabrous, the carpopodites clothed with a tuft of hairs at the 

 distal ends of their upper margins, and the propodites are clothed 

 with hairs in the same manner as the legs of the third and fourth 

 pairs. 



The rami of the uropoda are broad, and resemble those of 

 G. Darwinii. They are as long as the terminal segment of 

 the postabdomen, and their posterior margin, like the external 

 margin of the outer rami, is fringed with hairs ; the upper surfaces 

 of the outer rami present two longitudinal ridges proceeding 

 from the base of the joint to the posterior margin, and that of 

 the inner rami one ridge. 



The largest specimen, a male, is 39 millim. long from the 

 tip of the front to the posterior margin of the terminal post- 

 abdominal segment ; the cephalothorax of this specimen is 12| 

 millim. long, and the chelipedes measure 19 millim. 



Family Thalassinid^. 



Grenus Thalassina, Latr. 



145. Thalassina anomala, Herhst. 



Cancer auomalus, Herbst, Krabben und Krebse, iii. p. 46, Taf. Ixii. 

 (1803). 



Thalassina scorpionides, Latreille, Gen. Crust, et Ins. i. p. 51 (1807), 

 nee Guerin et Milne-Edwards. — See Steensirup et Liltken, Videnska- 

 belige Meddelelser, p. 257. 



One old specimen was collected at Mergui, where the species 

 is very common. In it the distance of the tip of the beak to 



