1871.] MR. HARPER PEASE ON POLYNESIAN LAND-SHELLS. 457 



The variety referred to above I distinguish by the name of 



Trochomorpha trochiformis, var. fallens, Pse. 



Testa plerumque depressior, albida aut pallide straminea, linea unica 

 rufescenti-fusca cingulata. 



Trochomorpha nigritella, Pfr. 



The above has been credited by Dr. Pfeiffer to the Sandwich 

 Islands, which is an error. No species of its type or genus inhabits 

 that locality ; it is confined to Ponape, Caroline Islands. 



A distinct variety occurs so remote from the type that it was re- 

 turned to me by the late Mr. Cuming marked H. trochiformis, 

 Fer. I describe it as 



Trochomorpha nigritella, var. oppressa, Pse. 



T.umbilicata, solida, trochiformis, depressa, apice obtusa; anfr.6-6%, 

 planiusculi, lente accrescentes, irregulariter oblique tenuistriati, 

 ultimus acute carinatus, basi convexus ; apertura securiformis ; 

 perist. simplex, incrassatum, interdum marginibus callo junctis ; 

 flavescens, juxta suturam fascia rufescenti-fusca cingulata, basi 

 rufescenti-fusca, margine favescente. 



Diam. 13£, alt. 6 mill. 



Sab. Insula Ponape. 



The above differs from the type in being more trochiform in shape, 

 with the whorls nearly flat and smoother, and also in colour. 



Trochomorpha contigua, Pse. 



Trochomorpha congrua, Pse, Am. Journ. Conch, vol. iv. 1868, 

 p. 154. 



Name preoccupied, changed as above. 



Trochomorpha exclusa, Hombr. non Fer. 

 Trochomorpha exclusa, Voy. au Pole Sud, p. 24, pi. 7. f. 14-17. 

 The above, collected at the Tahitian Islands, is Swainsonii, Pfr., 

 and should not be connected with the Papuan species. 



Genus Partula, Fer. 



Having in preparation a monograph of the above genus in which 

 the distribution and variation of its species will be fully treated of, I 

 merely record descriptions of the following new species : — 



Partula pellucida, Pse. 



T. oblongo-ovata, anguste perforata, tenuis, pellucida, striis longitu- 

 dinalibus transversisque granulosa ; spira conica ; sutura impressa, 

 marginata ; anfr. 4%, plano-convexi, ultimus % longitudinis testoe 

 haud cequans ; apertura verticalis, ovata ; perist. subincrassatum, 

 album, vix expansum ; columella supra vix dilatata, fere recta ; 

 albido-cornea. 



