'7 



the principal references to de Haan, Miers, Ortmann^ etc., will 

 be found in Alcock's work above cited. 



Fam.: LEUcosiiDAii:. 



For an account of this family, and several sub-divisions of it or 

 " alliances/' the same work (p. 164) may be consulted. 



Gex, : Philyra, Leach- 



1817. Philyra, Leach, Zool. Miscell, vol. 3. p. 18. 

 1837. Philyra, Milne-Edwards, Hist- Nat. Crust., vol. 2, p. 131. 

 1855. Philyra, Bell, Trans. Linn. Soc. London, vol. 21, p. 299. 

 1877- Philyra, Targioni Tozzetti, Crost. Brachyuri e Anomouri, 



Magenta, p. 196. 

 1886. Philyra, Miers, Challenger Brachyura, Reports, vol. 17, 



p. 320. 

 1892. Philyra, Ortmann, Zool. Jahrb-, vol. 6, p. 582. 

 1896. Philyra, .Mcock, Journ. Asiat, Soc. Bengal, vol. 65, pt. 2, 



p'237- 

 1900. Philyra, ]\L J. Rathbun, The American Naturalist, vol. 34, 



P- 517- 

 Alcock observes that Philyra can be at once distinguished from 

 Leucosia by the absence of a thoracic sinus, and under Leiuosia 

 explains that the lateral epibranchial angles of the carapace form 

 on either side a distinct lobe, which is bent downwards towards) 

 the base of the chellipeds to form the eave of a deep sinuous de-t 

 pression in the side w"all of the carapace, known as the thoracic 

 sinus. Bell points out that the extraordinary dilatation of the 

 exopod in the third maxillipeds, which had been regarded as the 

 essential characteristic of Philyra. varies greatly in degree in the 

 several spccies- 



Philyra punctata. Bell. 



1855. Philyra punctata. Bell, Trans. Linn. Soc. London, vol. 21, 



p. 291, pi. 33, fig. 2. 



In agreement with Bell's description, the carapace is nearly 



orbicular, smooth, puiictate in every part. Except for a small 



interval in front, the carapace is entirely surrounded by a beaded" 



line, the little beads or projections showing in most part of the 



circumference considerable inequality. Similar ornaments fringe 



the fourth joint of the third maxillipeds and the hind margin or 



a transverse ridge of the first and second pleon-segments. The 



third maxillipeds in this species have the fourth joint very much 



AISIT. C 



