SOUTH AFRICAN MAKLXH MULLUSGA. 47 



■^Eissoa conspecta Smith. 



Rissoa conspecta Smith, M. of Malac,/ vol. xi, p. 35, 

 P] . II, fig. 26. 



Hab.— Port Alfred. 



"^Kissoa perspecta Smith. 



Rissoa perspecta Smitli, 'J. of Malac./ vol. xi, p. 85, 

 PI. II, fig. 25. 



Hab.— Port Alfred. 



■^ E i s s o i 11 a a 1 f r e d i Smith. 



Rissoina alfredi Smith,' J. of Malac.,' vol. xi, p. 35, 

 PI. II, fig. 24. 



Hab.— Port Alfred. 



■^Rissoina durbaiieiisis ii. sp. PI. VII, fig. 15. 



Testa iiiediocriter eloiigata, albida; aiifractus 7-8, vix con- 

 vex!, costis circiter 16 leviter obliquis et liris transversis 

 snpra costas tulierculatis (in anfractii pennltimo quatuor, in 

 ultimo septem) instructi, sutura profunda sejuncti, ultinius 

 supra liram anticain, ca?teris crassiorem, quasi sulcatus ; 

 apertura obliqua, irregulariter ovalis, antice hand profunde 

 siuuata; labrum varice crasso lato extra inunituin ; columella 

 in medio arcuata, callo albo, antice leviter iiicrassato, induta. 



Longit. 4'5 mill. ; diam. 1'5 mm. Apertura intus, 1 longa, 

 '5 lata. 



H ab . — Durban (Burnup) . 



A small, prettily granuled-cancellated species, Avith a deej) 

 suture, a strongly varixed labrum, and a conspicuous sulcus 

 around the base of the body-whorl, above the most anterior 

 of the transverse lirae, which is rather thicker tli.in those 

 above. It belongs to the same group as R. bicolln i-is mid 

 R. fenestrata of Schwartz. 



