1927] Pilsbry-Bequaert, The Aquatic Mollusks of the Belgian Congo 99 
18. Shells of moderate or rather large size, generally sculptured but sometimes 
SMGOt A ate sa A We Re oth fA 1 1 i eats Ta Melaniide. 
Quite small or aninute shellg ors: Sei. oe eR 14 
14. Cylindric, the summit broadly truncate; generally costate axially. 
| : Truncatellide. 
Ovate-conic or elongate-conic; generally not sculptured.................. 15. 
15. Generally perforate or rimate, not conspicuously solid nor very glossy. 
Amnicolids and Synceride. 
Imperforate, very solid and glossy............. Melaniidsze (Reymondia, etc.). 
16. Opereulum éaicireous within: ee ee a Amnicolidse( Buliminz). 
-Operculum wholly corneous................05% SR at Melaniide. 
PULMONATA BASOMMATOPHORA 
Auriculidze 
(ELLOBID# of some authors) 
Shell ovate or oblong, with the internal partitions absorbed above the penult 
whorl (except in Pedipes); aperture plicate or toothed within. 
Animal hermaphroditic. Integument rugose. Jaw consisting of conglomerated 
fibres. Radula with fairly horizontal rows of teeth; the central small and narrow; 
the laterals tricuspid; the marginals short, serrulate along the margin. Respiration 
pulmonary only. | | 
This family is of nearly world-wide distribution in warm and tem- 
perate latitudes. It contains amphibious snails which live on the sea- . 
shore at the upper limit of the tide and also in salt-marshes which are 
regularly covered and uncovered by the sea. 
Metampus Denys de Montfort 
Melampus Denys DE Montrort, 1810, ‘Conchyl. Systém.,’ IT, p. 319. Mono- 
type: Bulimus coniformis Bruguiére = Voluta coffea Linnzeus. 
Conovulus LAMARCK, 1816, ‘Encyclop. Méthod., Vers,’ I, Pl. ccccirx. Type by 
designation of Gray (1847, Proc. Zodl. Soc. London, p. 179): Bulimus coniformis 
Bruguiére = Voluta coffea Linnzus.! 
Shell of the shape of an inverted cone with shortly conic, wide spire composed of 
numerous whorls; the last whorl forming most of the shell, elongate and narrowed 
below. Aperture long and narrow; outer lip straight, sharp, inside with horizontal, 
short folds or teeth; columella with one or more stronger folds. 
The following species have been recorded from the Ethiopian 
Region. , 
Melampus ccinoides Moreet, 1889, Journ. de Conchyl., XXXVII, p. 14, Pl. 1, 
fig. 9. Port Elizabeth, Cape Colony. According to Pallary this species belongs in his 
subgenus Pseudomelampus (1900, Journ. de Conchyl., XLVIII, p. 240). 
Melampus caffer (Kiister)=Auricula caffra Kistrer, 1844, in Martini and 
Chemnitz, ‘Syst. Conch. Cab., I, 16, Auriculacea,’ 1, p. 36, Pl. v (1848; without 
1The name Conovulus has been sometimes dated from Lamarck, 1812, ‘Extrait du Cours de Zoologie,’ 
p. 116; but in that work only the French vernacular ‘‘Conovule”’ is used and no species are mentioned. 
