488 Dr. J. C. Melvill and Mr. J. II. Ponsonby on 



tlie new form (fig. 6). Secondly, E. enschemon differs in the 

 extension of tlie parietal plait some little distance up the 

 body-whorl, beyond the point of insertion of the outer lip. 



Ennea hypsoma*, sp. n. (PI. VIII. fig. 7.) 



E. testa mimita, alba, vitrea, breviter cylindrica ; anfractus ad 0, 

 quorum apicales duo obtusi, planati, ceteris tumidulis, apud 

 suturas impressis, longitiidinaliter undique arete tenuistriatis, 

 striis fere rectis ; apertura ovato-oblonga, peristomate pro magui- 

 tudine pero.rasso, plicis dentibusve tribus (vel interdum quatuor) 

 prtedilo, plica parietali magnopere prorainula, acuta, dente labiali 

 crasso, obtuso, plica columellari omnino interna, magna, aper- 

 turam fere claudente, dente basali fere evanido, in specimine 

 typico perparvo et obscuro. 



Alt. 2, diam. -075 mm. (sp. maj.). 



Hab. Bathurst {J. Farquhar). 



This species and E. periploca are among the most minute 

 Ennece described, and yet their plications and teeth are more 

 wonderfully disposed than in many of the larger forms of the 

 genus. The particularly prominent parietal plait, projecting 

 well over the plane of tlie orifice, has suggested the trivial 

 name of this elaborate little shell, whose alliance is, we think, 

 to be traced with the much larger and coarser E. leppani, 

 Sturany. 



Ennea oppiignans, sp. n. (PI. VIII. fig. 8.) 



E. testa breviter cylindrica, obscure rimata, albo-pellucida, nitida, 

 tenui ; anfractibus 6, apicali subplanato, supernis tumescentibus, 

 ad suturas impressis, undique tenuiter obliquistriatis, striis 

 interdum fere evanidis, interdum fortibus ; apertura oblonga, 

 peristomate albo, nitido, crassiusculo, reflexo, plicis dentibusve 

 quatuor munito, plica parietali prominula, acinaciformi, acuta, 

 perintrante, dente labiali crasso, bifido, basali interne, parvo, 

 plica columellari omnino interna, aperturam centralem fere 

 claudente. 



Alt. 2-75, diam. 1 mm. 



Hah. Bathurst, near Grahamstown (Farquhar). 



A small species, smaller than, but of much the same 

 build as, E. connollyi described in this paper; the mouth- 

 processes are very complicate; the columellar plait, wholly 

 internal, spreads centrally, almost clo.-ing the orifice. There 

 is a small basal tooth at some little distance below the bifid 



* v\f/w^a, an elevation. 



