REPORT ON THE ANOMURA. 27 



Family R A N i n i D ^. 

 Raninidee, Dana, U.S. Explor. Exped., vol. xiv., Crust., part ii. p. 1428, 1852. 



Genus Raninoides, Milne-Edwards. 



R(xninoides, Milne-Edwards, Hist. Nat. des Crust., t. ii. p. 19G, 1837. 



„ Dana, U.S. Explor. Exped., vol. xiii., Crust., part i. p. 403, 1852. 



Carapace ovately oblong, smooth, convex from side to side. Fronto-orbital border 

 horizontal, slightly narrower than the carapace at its middle, with a triangular rostrum. 

 Ocular peduncles capable of retraction into well-defined orbits, with the terminal joint 

 basally dilated ; the cornete of small size. Antennal peduncle of large size (especially 

 the second joint), the flagellum minute. Antennules well developed. External maxilli- 

 pedes elongate, the merus considerably shorter than the ischium ; the three terminal 

 joints of small size, inserted near the apex of the merus. Sternal shield broad anteriorly, 

 widely separating the legs of the first two pairs, and becoming narrower between those of 

 the third pair. Last pair of legs short and filiform, situated above and in front of the 

 penultimate pair. 



Raninoides personatus, White, MS. (PL II. fig. 5). 



C7ia7"ac<e?'S.— Carapace with its length nearly twice as great as the breadth, smooth and 

 polished, but minutely punctate, especially towards the frontal margin ; the regions not 

 indicated. The fronto-orbital border is straight, the lateral borders curved. The rostrum 

 is prominent and entire, its apex obtusely rounded, and the upper surface smooth. The 

 orbital border is fringed with hairs, and possesses an internal pointed lobe on each side 

 of the rostrum, separated by a deep fissure from a larger and squarer external lobe ; a 

 smaller fissure separates this last from the prominent antero-lateral spine. The lateral 

 border may be said to commence at the antero-lateral angle in the aforesaid spine, which 

 is acute and slightly incurved ; at a short distance posterior to it is a similar but slightly 

 larger spine ; for its posterior half this border exhibits a narrow raised and beaded line. 



The eyes are of moderate size, and the orbits fringed with hairs both above and 

 below. The basal joint of the antennular peduncle is moderately dilated and jDartly con- 

 cealed by the tips of the external maxillipedes and by the antennal peduncles ; the 

 second and third joints are subequal in length ; the flagella are moniliform. The antennal 

 peduncle is four-jointed, the second joint of large size with a strong prolongation from 

 its outer and distal border, the fourth of small size, and the flagellum short ; the thiixl 

 and fourth joints give rise to numerous long hairs. The pterygostomial areas are strongly 

 granulated as well as slightly pubescent. The external maxillipedes are very long and 

 narrow, their apices completely covering the epistomial region ; the ischium is about one- 



