'7 



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

 be found in Alcock's work above cited. 



Fam.: Leucosiidae. 



P or an accovuit of this family, and several snb-divisions of it or 

 alliances/' the same work (p. 164) may l)e consulted. 



Gen. : 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, Alcock, Journ. Asiat, Soc. Bengal, vol. 65, pt. 2, 



P- 237- 

 1900. Philyra, M. 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 Leucosia 

 explains that the lateral epibranchial angles of the carapace form 

 on either side a distinct lobe, which is bent downwards toward^ 

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

 pression in the side wall 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 species- 



Philyra punctata. Bell. 



1855. Philyra punctala. 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 maxilHpeds in this species have the fourth joint very much 



A1817. C 



