269 



EXPLANATION OF PLATES. 



PLATE XVIII. (Crustacea, Plate XCVIII.) 

 Datroides maryariiatns, u. g. et sp. 



n.s. These letters refer to the neighbouring figures of natural size, 

 roughly representing in dorsal aspect the carapace and pleon, 

 and in lateral view the pair of chelipeds (the smaller with 

 movable finger missing) and two of the ambulatory legs 

 from the fourth to the seventh joint. For true appearance 

 of carapace consult description. 



car. A small piece of the carapace as seen by transmitted light, 

 highly magnified. 



a.s. First antenna. 



in., mx. 1, mx. 2, mxp. 2, mxp. 3. Mandible, first and second maxillae, 

 second and third maxillipeds, to a uniform scale. 



prp. Terminal joints of an ambulatory peraeopod, highly magnified. 



PI., pip. 1, pip. 2. Dorsal view of pleon with first and second pleopods, 

 highly magnified. 



PLATE XIX. (Crustacea, Plate XCIX.) 

 Xeinostoina encheir, n. g. et sp. 



n.s. Lines indicating natural size of carapace in the male specimen 

 figured below, with first antennae, chelipeds, and (on the 

 left) the peraeopods 2-5, all in dorsal aspect- 

 PL c? , PI. 9 . Pleon of male in dorsal aspect, and similarly that of 



female showing the four pleopods in position on tha right, 

 m., mxp. 2, mxp. 3. Mandible and second and third maxillipeds of a 



male. 



prp. 1, prp. 1, mxp. 3. Chelipeds of a male, the upper figures in 

 dorsal and ventral aspects, the lower showing the companion 

 cheliped in dorsal aspect and in attachment to the third 

 maxilliped for estimate of the relative sizes. 



oc. 9 , a.s. 9 , a.i. 9 . Eye, first and second antennae of female. 

 mx. 1, mx. 929, mxp. 1 9 First maxilla, part of second maxilla, 

 first maxilliped, of female. 



