4 7 4 CRUSTACEA. 



Antenna and other characters like the above. Length of body, two 

 and three-fourths inches. 



Cancer clypeatus, Herbst, ii. 22, pi. 23, f. 2. 

 Pagurus clypeatus, Fabricius, Supp., p. 413. 



Cenolita clypeata, Edwards, Crust., ii. 239. Not C. clypeata of Owen, Crust. 

 Blossom, 85, pi. 25, f. 3. 



BlKGUS LATRO, Leacli. 



Plate 30, fig. 5 a, coloured sketch, somewhat reduced from the 

 natural size, made from life, by A. T. Agate, one of the artists of the 

 Expedition. The death of Mr. Agate, and the loss of the specimens 

 by the wreck of the Peacock, have prevented finishing the sketch in 

 some parts; b, view of part of inner surface of the stomach, by the 

 author, natural size. 



From various islands of the Paumotu Archipelago (the sketch was 

 from a specimen taken at Honden Island) ; also, from Swain's Island, 

 north of the Navigator Islands. 



The loss of our specimens prevents us from making a direct com- 

 parison with the species of the East Indies. From notes taken in the 

 Paumotus, we mention the following characters. 



Length, nine inches ; of carapax, four and one-half inches ; greatest 

 breadth, four and seven-eighths inches; second pair of legs in a 

 female, nine inches. The medial line of the posterior part of the cara- 

 pax is occupied by two narrow wedges, the acute angles of the 

 wedges meeting just posterior to the centre. (These are repre- 

 sented as one piece in the latro, as figured in fig. 1, pi. 43, Cuv., 

 by Edwards.) The anterior part of the carapax is marked with 

 transverse linear depressions, about one-fourth of an inch long. The 

 abdomen has at extremity two small crustaceous plates, the penult of 

 which has very minute appendages, and is pubescent, though smooth. 

 Abdomen below laterally verrucose, with the verrucse pubescent; 

 covered with short imperfectly jointed setae of very peculiar appear- 

 ance along its medial space. 



Eyes on the exterior part of the extremity of compressed pedicels; 

 outer margin of pedicel uneven. The exterior antennas are about 

 two-thirds as long as the body. The nasal opening in males is 

 irregularly semilunar; the depth of the cavity is nearly that of the 



