CANCROIDEA. 



GENUS MENIPPE, De Haan. 



In the genus Menippe of De Haan (Pseudocardnus of Edwards), 

 the antero-lateral margin is usually rather shorter than the postero- 

 lateral, yet the difference is often but slight. The praelabial plate 

 is undivided, as in other Xanthinae ; but there are related species, 

 similar in the base of the outer antennae, which belong with the 

 Eriphidae, and constitute the genus Pseudozius. 



The genus Pelaeus of Eydoux and Souleyet, figured in the Voyage of 

 the Bonite, appears, from the figure and from specimens examined by 

 us, to be identical with Menippe. The species P. armatus is from the 

 Sandwich Islands. 



MENIPPE RUMPHII. 

 Rio Janeiro ? 



Length of carapax of female, two and one-half inches; greatest 

 breadth, three and three-fourths inches ; ratio of length to breadth, 

 1 : 1-5. The general characters are well given by M. Edwards (Crust., 

 i. 408). The teeth of the antero-lateral margin are simply the nor- 

 mal teeth, D, E, N, T, S. The breadth of the carapax from T to T 

 is hardly less than from S to S. The areolation is anteriorly quite 

 distinct. 2 F is a rounded prominence either side of the medial line. 

 1 M is still more prominent and coalesces with 2 M. The areolets of 

 the antero-lateral region are about as distinct as in our figure of Etisus 

 levimanus (Plate 10, fig. 1). The tarsi have a dense hirsute coating, 

 excepting along a narrow line on either side ; and the upper margin 

 of the preceding joint is in part similarly hairy. 



The outer maxillipeds have the third joint widest on the inner side, 

 the anterior margin inclined and somewhat concave. 



Cancer Rwmpliii, FABR., Supp., 336. 



Menippe Rumphii, DE HAAN, Faun. Japon. (1833), 21. 



Pseudocarcinus Rumphii, EDWARDS, Crust., i. (1834), 408. 



GENUS PANOPvEUS, Edwards. 

 In the characteristic species of this genus, the antero-lateral 



