THE NAUTILUS. 81 



Planorbis Madagascariensis E. A. Smith. 



Hab.: Vinaninony and Fenoarivo. 

 Planorbis trivialis Morelet. 



Hab.: Same localities. 

 Acroptychia cequivoca Pfeiffer. 



Hab.: Antankaratra (Humblot). 

 I think that A. mam'cata, Cr. anil F. is the same as this. 



Hainesia crocea Sowerby. 



Hab.: Anclrahomana, S. Madagascar (Sikora). 

 I do not see that any precise locality was ever given for this 

 species, erroneously ascribed to Mauritius by Benson. 



Cyclostoma carnicolor Anc. 



Testa pro genere mediocriter sed profunde umbilicata, globoso- 

 conica, solida, supra parum, inferne magis nitida, superne spiraliter 

 multisulcata, prreterea lineis incrementi sub lente decussata, carnea 

 vel rubella, ad apicem luteola, fascia fuseo-coerulea infra peripheriam 

 cincta. Spira conoidea, apice sat minuto, obtuso. Anfractus 5^ 

 convexo-rotundati, ultimus bene rotundatus, subtus fasciam Isevi- 

 gatus, dein iterum circa umbilicum et in umbilico ipso confertim 

 concentrice liratus, antice breviter ascendens. Apertura albida, 

 intus Candida vel luteola, fascia transmeante. Peristoma expansum, 

 marginibus approximatis, callo subemarginato junctis, columellari 

 dilatato-reflexo. Operculum testaceum, sordide album, anfractibus 

 4, nucleo subcentrali. 



Diam. maj. 23i-26, min. 18-20, alt. 21-26 mill. 



Hab.: Andrahomana (Sikora). 



Nearly related to C. aspernm, Pot. and Mich., but much less 

 rugose and of different color. It may be the southern analogue of 

 aspcmm, which lives in the northern end of Madagascar. 



Cyclostoma Alayerianum Anc. 



Testa globoso-turbinata, pro genere anguste umbilicata, parum 

 crassa, spiraliter confertim acutique lirata, liris in ipso umbilico con- 

 spicuis, infra peripheriam ultimi anfractus lasvioribus, ochraceo- 

 fulvescem, fasciis angustis 2 fuscis, quarum una angulo superiore 

 aperturas incipit, altera minus conspicua supra peripheriam ultimi 

 cirigulata. Spira turbinata, apice lasvi, obtusulo. Anfractus 5 

 valde convex!, sutura profunda, inferne minute plicatula, ultimus 



