TO IX D I AX CAECINOLOGY. 101 



Distribution. Japan {iJe Ilaaii) ; Iloug Koug {Stimjjsou) ; Philippines (Bell) ; 

 Mergui {De Jlcm). 



181. PlIILYll.V GLOBOSA (Fal)!'.). 



F. ylobusa (Fabr.), De Man, Mergui Crust, p. 202 (1888). 



Rameswaram and TvAXcox'm. {Thurston). Common at Madras and on the Sontli Indian 

 coast generally {J. B. IE.). 

 Distribution. Indian Seas. 



182. PiiiLYRA POLiTA, n. sp. (PL XXXVIII. tigs. 1-3.) 



Madras, a series, not uncommon (,/. B. H.). 



This species is closely allied to P. globosa, but distinguished as follows : — The carapace 

 is smooth, shining, punctate, and regularly conve.x:, without grooves, the margin defined 

 Ijy a finely granulated line, which in th(^ hepatic region is not perceptibly indented. In 

 P. globosa, on the other band, the cara^iace is finely granulated on the branchial regions, 

 not shining, and with branchio-cardiac grooves ; the marginal line carries tubercles of 

 varying size, and is distinctly indented at the hepatic area. 



The hand and carpus of the chelipcdes are smooth, whereas in P. globosa they are 

 granulated along the inner surface, and the granules are partly arranged in linear series. 

 The fingers arc smooth on their upper and lower svu'faces, and tbe opposing margins are 

 onlv sparingly toothed ; in P. globosa the surfaces are finely sulcate. The inner margin 

 of the hand and immobile finger is almost straight ; in P. globosa it is strongly curved. 

 The penultimate segment of the male abdomen is smooth externally, and nearly twice 

 the length of the last segment ; in P. globosa it carries a jiromineut tubercle near the 

 distal end, and is only about one fourth of its length longer than the terminal segment. 

 The meropodites of the ambulatory legs are smooth underneath, whereas in P. globosa 

 they are finely granulated, especially those of the first pair. 



The largest specimen, a male, has the carapace 19'5 mm. both in length and in 

 breadth, the hand 18*5 mm. long, and the dactylus 10"5 mm.; in the female the carapace 

 is very slightly broader tban long. 



This species has probably been confused with P. globosa. It is almost certainly llie 

 one referred to Leucosia porcellana of Pabricius, by Leach, Bell, and Milne-Edwa^•ds ; 

 but Do Man, who has examined the type, has shown that Fabricius's species is a true 

 Leucosia. Both Leach and ]3ell considered the species they examined as scarcely 

 distinct from F. globosa. In the British Museum, under the name " ? D/iili/ra jjorcellana , 

 Fabr.," there are three specimens, two of the present species, and a third of a distinct 

 undescribed form ; all three carry a second label " P. globulosa," probably in Bell's 

 handwriting. 



In some specimens of P. polita the carapace is encrusted with Jrembranijwra Sarartii, 

 Aud., and a species of Ugdractinia occurs on tlie arms both of this species and of P. 

 globosa. I have not met with these comnumsals on P. scabriuscula, Avhich ])rol)ably 

 burrows in the sandy bottom, while their presence in the two former indicates that they 

 live above ground. 



