148 DK. O. F. A^ON MOELLENDORFF OS [Feb. 20, 



artificial division of the geuus as given by Pfeiffer they might be 

 <iassed in Discar lemon. 



4. Steeptaxis (Oophana) bulBtjlus, Morelet. 



Streptcuvis (^Oophana) Imlbulus, Tryon, Man. Pubn. i. p. 80, 1. 15. 

 figs. 41-43. 



Described from Pulo Condor. The single specimen from the 

 Samui group is rather more ventricose, the dimensions being 15 : 

 11-5 millim. instead of 16-5 : 11 in the tj^pe. 



5. Steeptaxis (Oophana) steangtjlatcs, sp. nov. (Plate XVI. 

 fig. 5.) 



T. aperte umhilicata, ovata, sat tenuis, suhtiJiter arcuafim costulala, 

 sericina, hyalina ; spira suhregulariter ventroso-conica, apice 

 obtuso, glahrato. Anfr. 6, sat convexi ; ultimus paullum devians, 

 circa vmhilicum comjjressus, ohtuse cai'inatus, pone aperturam 

 snhito coarctatus. Apertura parnm ohliqua, truucato-ovalis ; 

 2'>er{stoma late e.vpansmn, tenue, intus callosum, acl insertionem 

 marginis externi attenuatum. Lamella parietalis valida, sat 

 elevata ; clentihus 5, uno in parte superiore collumellce, 2 in 

 marqine hasali, 2 in margine externa oppositis. 

 Alt. 10'5, diam. 7'5 millim. 



Although certainly belonging to the efi'oup of the last species, 

 this peculiar form differs at once in the almost regular, hardly 

 deviating last whorl and the peculiar coarctation behind the mouth, 

 which calls to mind the similar formation in certain species of 

 Alycceus (Diorifx). The whorls also are more convex, the shell 

 is thinner, the peristome broader, and there are 5 teeth instead 

 of 3. 



Mr. Ancey is quite right in considering his group Oophana, of 

 which S. bulhulus is the type, to be a connecting-link between 

 Streptaxis and Ennea. In fact S. strangvlatus would at first sight 

 rather be considered as an Ennea by n)9,ny, on account of its 

 regular shape. That this is, however, a Streptaxis and not an Ennea 

 may be inferred from young specimens, which show no teeth, 

 whilst all the young Ennece are dentate. 



Fam. Nai^inid^. 



6. Maceochlamts limbata, sp. nov. (Plate XVI. figs. 6, 7.) 



T. perforata, discoideo-depressa , soUdida, suhtiliter striatula, lineis 

 spiralihus nullis, pellucida, nitens, pallide comeo-flavescens, 

 suhregidariter corneo-strigata. Anfr. 6, convexiiiscidi, lente ac- 

 crescentens, sutiira profunda marginata discreti ; ultimus non 

 descendens, basi convexior, circa umhilicum excnvatus. Apertiira 

 fere verticalis, late ellip>tica, valde excisa ; peristoma extvs 

 rectum, aciitum, margine columellari leviter reflexo, intus callo 

 laiivscido, sat crasso limbatum. 



Diam. mnj. 19-22-5, min. 16-5-20, alt. 10-25-13-5 millim. 



