AURICULACEA. 



14. Pythia lessoni, Biainv. 



[ = P. savaiensis, Mouss.] 



4 Vavan, Friendly I. ; ex c. F. L. Layard, Esq. 

 1 Savay, Ovalau ; ex Museum Godeffroy. 



3 Mare, Loyalty I. ; ex c. F. L. Layard, Esq. 



var. striata, Rv. 



30 Galathea Bay, Katchall and Teressa; coll. Dr. F. Stoliczka and 

 F. A. de Koepstorff, Esq. 



var. (prox striata). 



7 Great Cocos I. ; coll. Dr. F. Stoliczka. 



5 Borneo Strait ; coll. Dr. F. Stoliczka. 



Genus PLECOTREMA, H. and A. Adams, (type P. 

 clausa, H. and A. Ad.). 



1. Plecotrema exigua, H. Ad. 



[? = P. sowerbei, var.] 

 16 Trou d'Eau douce, Mauritius (type) ; coll. G. Nevill, Esq. 



2. Plecotrema sowerbei, Montr. 



1 Andaman I. j coll. G. Nevill, Esq. 



var. compressiuscula. 



1 Table I., Burma (type var.) j coll. Dr. Hungerford. 



3. Plecotrema cumin giana, Bianford. 



1 Irawady Delta (typical) ; coll. W. T. Bianford, Esq. 



4. Plecotrema striata, Phil. 



The type of Bronn's Genus Laimodonta, not of Adams' Genera. 



[= incequalis, C. B. Ad.] 

 5 Sandwich L; coll. H. Pease, Esq. 



5. Plecotrema mordax, Dohm. 



1 Pomaulax ; coll. H. Pease, Esq. Judging from this single specimen, 

 fairly separable from the next form- 



6. Plecotrema rapax, 



(fide Jick. = P. mordax). 



1 Annesley Bay ; coll. W. T. Bianford, Esq. 

 3 Massaua; coll. Arturo Issel, Esq. 

 12 Aden ; coll. Dr. F. Stoliczka and G. Nevill, Esq. 



