MARINE CRUSTACEANS. 



251 



19. Gymo andreossyi (And.) 1826, var. inelanodactyliis (de Haan) 1833. Alcock, in. j). 174. 



Taken on the shore in Minikoi and Goifurfehendu Atolls, and dredged from 12 fathoms 

 in Fadifolu Atoll. 



20. Gymo quadrilobatus, Miers, 1884. Alcock, ill. p. 17.5. This species is probably 

 identical with G. tuhercidatus Ortmann {Zool. Jahrb. vii. Syst., p. 443). 



Taken on the shore in Male, Goifurfehendu and Fadifolu Atolls. 



Fig. 50. Xantho frontalis ; a. whole animal, 6. outside of hand, c. underside of meropodite of walking leg, to show 

 the groove into which the last three joints can be folded. 



Genus Xantho Leach, 1815. 



21. Xantho frontalis, n. sp. (Fig. 50). 



Diagnosis : " A Xantho with the whole body finely and evenly granulated, the regions 

 marked out by fine sharp lines ; the front prominent, its outline like that of a cupid's bow ; 

 the anterolateral edge divided into four lobes, of which the first two are low and rounded and 

 the last two prominent and conical ; the chelipeds subequal, their outer surface rough and 

 uneven, the hands with four indistinct longitudinal ridges, the fingers furrowed and bearing 

 interlocking teeth, the upper side of the hand with an irregular-rounded lobe, the inside of the 

 wrist with a conical tooth ; and the walking legs short, with long end-joints, two knobs on the 

 upper side of the carpopodite, and a hollow under the meropodite into which the outer joints can 

 be folded." 



Length : 5 mm. Breadth : 8 mm. Colour in spirit : white with pale-brown fingers. 



Genus Xanthias Rathbun, 1897. 



22. Xanthias lamarcki (H. M. Edw.), 1834. Alcock, in. p. 157. 



Taken on the shore in Male, Goifurfehendu, Miladumadulu, Fadifolu, S. Mahlos, and Minikoi 



Atolls. 



