1900.] FROM SINGAPORE AND MALACCA. 735 



says that the pterygostomian regions are notgranulous ; in all these 

 specimens they are distinctly granulated. 



Dim. tf 30-5x19-5. tf 2*9-5x19. rf 26-5x17. $28-5x18-5. 

 $ 27-75 x 17-5. 



XX. Genus Ctcloxanthus A. M.-Edw. 



37. Ctcloxanthus lineatus A. M.-Edw. (?) 



Cf. Cycloxanthus lineatus, A. M.-Edw. Xouv. Arch. Mus. t. ix. 

 p. 209, pi. vi. f. 5 (1873) ; Miers, ' Alert ' Crust, p. 212 (1884). 



Hob. Uncertain. A small male. 



I cannot definitely refer this specimen to M.-Edwards's species. 

 The carapace is not at all smooth ; there is a distinct low carina 

 on each side over the branchial regions, extending from the last 

 tooth nearly to the middle line ; two low swellings on the naso- 

 gastric, and one on the cardiac regions. The whole surface, 

 moreover, is finely and closely granulated. Colour a dull grey ; 

 legs yellow ; fingers of chelipedes brown. This individual is 

 identical with the two specimens obtaiued by the ' Alert.' 



Dim. 7-5x5-5. 



XXI. Genus Euxanthus Dana. 



38. Etjxanthus huonii Jacq. et Lucas. 



Cancer huonii, Jacq. et Lucas, Voyage au Pole du Sud, Crust, 

 p. 16, pi. iv. f. 1 (Hombron et Jacquinot, tome iii. 1853). 



Euxanthus huonii, A. M.-Edw. Nouv. Arch. Mus. t. i. p. 290 

 (1865) ; Miers 'Alert' Crust, p. 204 (1884). 



Hah. Singapore ; littoral, from among stones and dead coral. 

 One male. 



A. M. -Edwards thinks it possible that E. huonii and E.sculptilis 

 Dana may be identical. Mr. Miers, commenting on this, points 

 out that the black coloration of the fingers extends on to the 

 hand in M.-Edwards's figure, and also in his (' Alert ') specimen. 

 This, he adds, is not figured by Dana, nor does it occur in two 

 Museum specimens one of which has been designated E. huonii by 

 A. M. -Edwards, but which Mr. Miers refers provisionally to 

 E. sculptilis. Now, in this example from Singapore, the colour is 

 limited to the fingers also ; yet there c-an be no doubt it is identical 

 with E. huonii, and not with E. sculptilis, for two reasons — firstly, 

 the fingers are not denticulate above : and secondly, the postero- 

 lateral margins are deeply concave, while in Dana's figure they are 

 represented as nearly straight. For these reasons, also, I should 

 still regard E. huonii and E. sculptilis as distinct. I Mas unfor- 

 tunately unable to obtain the specimens referred to by Mr. Miers 

 for purposes of comparison (vide footnote x ). 



Dim. 18-5x13. 



1 The two specimens of Euxanthus sculptilis to which Mr. Miers refers {op. 

 cit. p. 204) were not in the collection when I made a MS. catalogue of the 

 Jirachyura in 18fr>.--Jb\ J. ii., Nat. Hist. Mus. 10 April, 1900. 



48* 



