Boo7ie, Mollusca, Cruises of "Ara" and "Alva" 295 



Subfamily : Liolophurinae Pilsbry 



Genus: LIOLOPHURA Pilsbry 



Liolophura gaimardi de Blainville 



Plate 112 



Type : This was collected in Port Jackson, New South Wales, 

 and is deposited in the Paris Museum. 



Distribution: Port Jackson, New South Wales (de Blain- 

 ville, Coppinger, Haddon) ; New South Wales (Gould) ; Australia 

 (Pilsbry) ; Falcon Island, Palm Islands, Queensland (Boone). 



Text figure 17. — Transverse section of girdle of Liolophura gahnardi 

 de Blainville, greatly enlarged. 



Material examined: Five specimens, from the reefs, Falcon 

 Island, Palm Islands, Queensland, Australia, October 7, 1931. 



Technical description: Colour: The valves are buff -gray, 

 marked on the jugum and sides with black. The girdle is tessel- 

 lated, having alternately light and dark bands. The interior of 

 the shell is dark red-brown, whitish on the edge of the sutural 

 plates and valve callus. The posterior internal margin is covered 

 by reflexed blackish brown tegmentum. The sutural plates are 

 brownish below with white outer margin; from above they are 

 whitish shading into reddish brown toward the median sinus. 

 These plates are rounded, broadly separated by a very wide, deep, 

 rounded sinus. 



Shell: This is oblong, depressed, roundly arched, with a long 

 diameter of 55 millimeters, and a short diameter of 35 millimeters, 

 belt included, or of 48 millimeters long diameter and 22 milli- 

 meters, without the belt. 



Anterior valve: This is much eroded, with the apex rounded. 



