BY WILLIAM A. HASWELL, M.A., B.SC. 49 



3 7 ellowish-grey, with yellow markings on the base of the fingers, 

 and on the ambulatory legs. 



Length 10£ lines ; breadth 9 lines. 



Hal. Darnley Island (Chevert Exped.). 



Sp. 13. Leucosia moresbiensis, sp. nov. Testa suborbiculari, 

 antice depresso-punctata ; fronte tridentato ; sinu thoracico 

 angustissimo, tubercnlis complanatis tribus infra ornato ; manibus 

 utrinque carinatis, extrorsunilaBvibus, introrsiimordineinconspicuo 

 grannlornni ; digitis aeumiiiatis, incurvis. 



Carapace sub orbicular, minutely punctate anteriorly. Rostrum 

 rather short, armed anteriorly with three minute teeth, of which 

 the central one is much the largest. Thoracic sinus very narrow, 

 bordered below by a row of three large compressed tubercles, 

 continued backwards into a row of very minute granules. External 

 maxillipedes with the proximal articulations dilated, and 

 bordered with a close fringe of hairs. Anterior ambulatory 

 limbs somewhat longer than the body ; arm with its upper 

 surface pretty closely tuberculated except at its distal end; 

 wrist armed with a single row of minute granules ; hand carinated 

 internally and externally, the internal carina granulated ; fingers 

 slender, acuminate, the points incurved, their inner border 

 armed with minute teeth in rather less than the distal half. 

 Abdomen (female) ovoid, strongly convex. Colour deep brown 

 above, lighter posteriorly ; light brown below. 



Length 9 lines ; breadth 8. 



Sab. Port Moresby, New GHiinea. (Australian Museum.) 



This form more nearly resembles L. obscura of Bell than any 

 other described species ; differs from it, however, in the form of 

 the thoracic sinus, the small size of the granules on the postero- 

 lateral and posterior borders of the carapace, in the possession of 

 a row of granules on the inner border of the hand, and in the 

 armature of the fingers. 



