new Mollusca from South Africa. 635 



nine-whorled, and also diflferently shaped, the mouth-processes 

 being nearly identical ; the mammiform columellar plait is, 

 however, in E. Burnupi thinner, and not bulbous as usual. 



Mr. Burnup, the collector of this and of so many other new 

 species in Natal, remarks that this is the only species of the 

 genus which he has hitherto met with living " off the ground, 

 it having been discovered on the under surface of the leaf of 

 a Dracena.^^ 



Hapalus catarractce, sp. n. (PI. XVII. fig. 4 ) 



H. testa ovato-fusiformi, translucida, perteuui, Isevi, pallidissime 

 corneo-olivacea ; anfractibus quinque, apicali obtuso, ultimo 

 rapide accrescente, paullum infliato, immaculato ; apertura parva, 

 ovata, labro exteriore tenui, simplici ; columella rectiuscula, 

 regionem apud umbilicarem triangulatim refiexa. 



Long. 4'50, lat. 2'o0 mm. 



Hab. Howick (a waterfall near Pietermaritzburg), Natal. 



Four specimens of a very small but neat Hapalus, a genus 

 not before known so far south, Bulimoid in its superficial 

 conchological characters, allied apparently to PachnoduSy 

 but its exact affinities are not yet certainly known. In the 

 British Museum it is arranged near Opeas. 



The shell is ovate-fusiform, very pellucid, of the palest 

 horny olive, five-whorled, the apical being obtuse and the 

 last whorl rapidly increasing, a little inflated ; mouth small, 

 ovate, outer lip thin, simple; columella straight and triangu- 

 larly reflexed over the umbilical region. 



This constitutes a particularly interesting addition to the 

 South-African molluscan fauna. 



Trachycystis terettuscula* , sp. n. (PI. XVII. fig. 5.) 



T. testa dcpresso-globiilosa, anguste sed profunda umbilicata, tenui, 

 delicata, olivaceo-cornca ; anfractibus sex, ventricosis, apud 

 suturas impressis et quasi-canaliculatis, arctissime longitudinaliter 

 et indistincte striatulis ; apertura luuata ; peristomate tenui, 

 simplici. 



Long. 3, lat. 4 mm. 



Hab. Howick, near Pietermaritzburg. 



Though small and without any very special characteristics, 

 we are quite unable to match this little Trachycystis. It is 

 depressedly globular, narrowly but deeply unibilicate, thin, 

 uniformly olive-horny in colour, six-whorled, the whorls being 

 tumid and almost canaliculate at the sutures, so impressed 



* Teretiusculus, small and smooth. 



44* 



