234 Carcinological Fauna of India. 



Andamans, and young males from Palk Straits, Mergui (and Hong- 

 kong ) . 



The young male from Mergui lias been named Pseudophilyra hoedtii 

 by Dr. de Man. 



64. Leucosia truncata, n. sp. Plate VI. fig. 6. 



Differs from L. puhescens, ovigerous females compared, only in the 

 following characters : — 



1. The front is broad and so extremely short that its free edge 

 does not project beyond, indeed barely projects as far as, the epistome. 



2. The thoracic sinus is extremely shallow, but yet is a distinct 

 sinus, with a row of minute granules above the base of the chelipeds. 



3. The dactyli are palmulate. 



4. A distinct Hue of sharp cut beads bounds the inner edge of the 

 wrist and of the hand. 



Two adult (ovigerous) females from the Orissa coast. The coloura- 

 tion is exactly similar to that of L. puhescens, but darker. 



The first specimen that I saw I regarded, after careful exami- 

 nation, as either a malformation of L. puhescens, or a specimen of L. 

 puhescens that had had its front broken and imperfectly repaired. 

 But a second ovigerous female of exactly similar form, from another 

 dredging station, now leads to the conclusion that, instead of being 

 malformations, these two specimens must represent either a new species 

 of the L. craniolaris and rhomhoidalis type, or possibly may belong to 

 the L. porcellana of Fabricius, which de Man states definitely is a true 

 Leucosia. 



At any rate the species here under consideration is a genuine Leu- 

 cosia, and not a Fseudophilyra or Philyra. 



65. Leucosia rhomhoidalis, De Haan. 



Leucosia rhomhoidalis, DeHaan, Farm. Japon. Crnst. p. 134, pi. xxxiii. fig. 5 : 

 Bell, Trans. Linn. Soc. Vol. XXI. 1855, p. 284, and Cat. Leucos. Brit. Mua. p. 

 6 : F. Muller, Vorli. Ges. Basel, VIII. p. 472 : A. Ortrnann, Zool. Jahrbuch. Syst. 

 etc., VI. 189i', p. 586. 



? Leucosia craniolaris, Desmarest, Consid. Gen. Crust., p. 167, pi. xxvii. fig, 2. 



Leucosia maculata, Stirnpson, Proc. Acad. Nat. Sci. Philad. 1858, p. 159. 



Differs from L. craniolaris Herbst, only in the following particulars, 

 adults of both sexes being compared : — 



1. Its size is very much smaller : the carapace of the adult, in our 

 series of 23 specimens, is never more than 16 millim., and is usually 

 about 14 millim. long. 



2. The front, which is as long as broad, has its sides subparallel 

 239 



