On new Species of Helicarion, &c. 91 



Conus sp. 



This specimen consists of a very rough natural cast of 

 a Conus probably related to G. deperditus of Bruguiere, which 

 is found in Eocene areas. It is of broadly conical form, 

 exhibiting the last three volutions, and furnished with a 

 suture which, in the cast, is deeply canaliculated or concave. 

 There are no sculpture-markings ofc' any kind preserved, nor 

 is the anterior end complete, although its general contour 

 and facies would suggest its connection with a form like 

 C deperditus. 



Dimensions. Maximum diameter 35 mm. 



Log, Garadimi. 



Collector. Captain Lelean. 



EXPLANATION OF PLATE V. 



With the exception of figure 7, all the figures are drawn of 

 the uatural size. 



Fi(f. 1. Rostellaria cf. ()oniophora, Bellardi, sp. 



Fig. 2. Vohdilithes cithara, Lamarck, sp. 



Fi(j. 3. Citlyptrcea nigeriensis, sp. n. 



Figs. 4, 5. Vulsella nigeriensis, sp. n. Fig. 5 shows the chondrophore. 



Figs. 6, 7. Spondylus cf. subspinosus, Archiac. Fig'. 7 shows the striated 



sculpture, magnified. 

 tig. 8. Lncina cf. Menardi, Deshayes. 

 Fig. 9. Lucma cf. pharaonis, Bellardi. 

 Fig. 10. PanopcBa sahariensis, sp. n. 



IX. — On nexo Species of Helicarion, Ariophanta, Eulota, 

 Cyclotus (Eucyclotus), Lagochilus, and Diplommatina 

 ((iastroptychia) . By Hugh Fulton. 



Helicarion rugosa, sp. n. 



Shell globosely depressed, thin, subtransparent, almost 

 imperforate, light brown or horn-colour ; whorls 4, slightly 

 convex, upper whorls smooth, the lower covered with rugose 

 spiral strife, underside of last whorl getting smoother towards 

 the umbilicus, carinated at the periphery ; aperture suboval ; 

 peristome simple. 



Maj. diam. 40; alt. 23 mm. 



Aperture: maj. diam. 23; alt. 20 mm. 



Hah. ^ . 'QoxwQO {Waierstradt) . 



This large and striking form is quite distinct from any 

 other species known to me. 



