12 Mr. E. J. Miers on new or little-known 



margins, and nearly straight. All the ambulatory legs are 

 slender, cylindrical, and unarmed. Length to base of rostrum 

 5 lines, breadth 4^ lines. 



Hab. Canaries (R. Mac Andrew, Esq.). 



This species shows a relation to Hyastenus in its greatly 

 elongated second legs. In the form of the rostrum it ap- 

 proaches P. erinacea, A. M.-Edw., a West-Indian species. 

 It differs very markedly from the Micropisa ovata, Stimpson, 

 from the Cape-Verds, as figured by M. A. Milne-Edwards, 

 in its slenderer, more divergent rostral spines, narrower cara- 

 pace, and longer second legs. Specimens both of M. ovata 

 and of M. violacea, A. M.-Edwards (the latter from W. Africa), 

 are in the Museum collection, and have so great an affinity 

 with the species of Rhodia, Bell, and Herbstia, that I think 

 it will be impossible to maintain the genera Micropisa and 

 Rhodia as distinct from Herbstia. 



Hyastenus (Chorilia) gracilirostris, sp. n. 

 (PL IV. fig. 7.) 



Carapace subpyriform, with three spinules in a longitudinal 

 median series on the gastric region, a strong conical spine on 

 the cardiac, a tubercle on the posterior margin, and two spines 

 on each of the branchial regions, of which the larger occupies 

 the usual position of the lateral epibranchial spine. Spines 

 of the rostrum very slender and divergent. Basal antennal 

 joint rather broad, and with only a small tubercle at its antero- 

 external angle. Merus joint of outer maxillipedes small, 

 transverse. Anterior legs rather small ; arm and wrist 

 slender; palm compressed; fingers arcuate and meeting only 

 at the tips, which are denticulated and acute. Ambulatory 

 legs very slender, the first pair much the longest. Postab- 

 dominal segments distinct. Length of carapace to base of 

 rostrum about | inch. 



Hab. Fiji Islands, Nairai (H.M.8. 'Herald 1 ). 



One male example is in the collection. 



This species differs from all its congeners in the disposition 

 of the spines and tubercles of the carapace. 



Pseudomicippe ? varians, sp. n. ? (PI. IV. fig. 8.) 



I designate by this name, with much hesitation, two speci- 

 mens, male and female, in the British Museum. They agree 

 with one another in the characters of the orbital and antennal 

 region, and in the number and disposition of the tubercles of 

 the carapace, and also in these particulars with the figures and 

 description of Pseudomicippe tenuipes, A. Milne-Edwards. 

 There do not exist, however, on the ventral surface of the 



