and South- America II Crustacea. 447 



float." He took them between the Bay of Bengal and the 

 Cape of Good Hope. The specimen from which Dana de- 

 scribed the species was " taken in the Antarctic seas south of 

 New HoUand." 



IV. Munida. — Probably same as VI. 



V. Hyperia. — Having received several specimens of these 

 from Dr. Cunningham, I have been enabled to identify them 

 as being Themisto antarctica of Dana. 



VI. (Plate XXI. fig. 2). — Judging by Dr. Cunningham's 

 drawing, I think that these must be the young of Galathea 

 monodon of Milne-EdAvards, of which the Munida ( Galathea) 

 alluded to in No. IV. as being captured in the Strait was a 

 stray specimen. 



VII. Uca Cunnmghami (PI. XXI. fig. 3) . — The development 

 of the land-crabs, of which this is one, has been carefully 

 worked out and figured, in the ' Transactions of the Royal 

 Society,' by Prof. Westwood. I know this species only by 

 Dr. Cunningham's figure, and place it in the genus Uca rather 

 than in that of Gecarcmus, because there are no teeth or spines 

 on the legs. The two genera, as well as those of Cardisoma 

 and Gecarcoidea, are distinguished from each other by the 

 different form of the gnathopoda, which, not being shown 

 in Dr. Cunningham's drawing, I cannot appeal to. But since 

 the species of the several genera described by M. Milne- 

 Edwards are distinguished by having rows of spines or teeth 

 on the walking-legs, I think it more probable that this species 

 may be more closely allied, through the form of the oral ap- 

 paratus, with Uca than with either of the others. 



Female. Carapace circularly oval ; lateral margins not con- 

 verging until over the penultimate pereiopod, then sud- 

 denly narrowing to about one-third of the broadest dia- 

 meter of the carapace ; anterior or intraorbital margin 

 smooth and continuously emarginate ; latero-frontal mar- 

 gins rounded, not defined, furnished with two short teeth 

 formed rather by depressions than dental elevations. 

 Orbits broad, and not deeply impressed in the carapace. 

 Antennae short. First pair of pereiopoda chelate, un- 

 equal, right the larger ; chelee strong, having the internal 

 margin of digital process of the propodos straight, taper- 

 ing, and armed with four or five strong tubercles ; dac- 

 tylos curved, tapering, and armed with one or two small 

 tubercles. The rest of the pereiopoda are subequal in 

 length, the last being somewhat the shortest, and have 

 the tarsi smooth and unarmed. The pleon has none of 

 the segments fused. The telson is narrower at the base 

 than the preceding segment. 



