BORRADAILE— ON OARIDES FROM THE WESTERN INDIAN OCEAN 411 



Genus NiKOiDES. 



24. Nikoides maldivensis Borradaile, 1915 (Plate 58, fig. 11). 



Ann. Mag. Nat. Hist. (8), xv. p. 209. 



A single specimen, taken at the Amirante Is., is closely related to N. danae Pauls., 

 1875 (Res. Crust. Red Sea i. p. 98, PL 14, fig. 5), but differs from it in the following 

 points : (l) the rostrum is of a different shape, the dorsal tooth being larger and placed 

 much farther back, (2) the exopodite of the first leg is relatively shorter, reaching 

 only half-way along the merus, (3) the carpopodites of the legs of the first pair are 

 of equal length, (4) there are no spines on the ischium or merus in the legs of the 

 last thr-ee pairs. The specimen measured 24 mm. in length. To the differences between 

 Processa and Nikoides stated by Nobili, there should be added the presence in the latter 

 of a single dorsal tooth on the rostrum. 



Family Glyphocrangonid^e. 



Genus Glyphocrangon. 

 Subgenus Plastocrangon. 



25. Glyphocrangon (^Plastocrangon) cceca Wood-Mason, 1891. 



Ann. Mag. Nat. Hist. Nov. 1891, p. 358; 111. Zool. "Investigator" Crust. PI. 3, 

 fig. 1. 



A single specimen taken in 300 — 500 fathoms at Saya de Malha. 



Family Crangonid^. 

 Genus ^geon. 



26. jEgeon rugulosus Borradaile, 1915 (Plate 59, fig. 12). 



Ann. Mag. Nat. Hist. (8) xv. p. 210. 



One damaged specimen, taken in Haddumati Atoll, Maldives, is related to ^. 

 medius (Ale. and And.), 1899, but differs from it in that: (1) the beading of the 

 ridges of the carapace is much coarser, (2) there is no tooth on either side of the 

 base of the rostrum, (3) the large spine near the pterygostomial angle of the carapace 

 stands at the end of the supramarginal, not at that of the lateral ridge, (4) the 

 dactyles of the first two walking legs are longer. The length of the specimen is 

 16 mm. 



