l62 JOURNAL OF CONCHOLOGY, VOL. IS, NO. 6, APRIL, I917. 



mm. ; while in P. humicola Dup. and Putz., from the Congo, they are 

 white and sub-spherical, and as they differ greatly from those of 

 typical species of the genus, probably belong elsewhere. The eggs 

 of Rwnina decoUata (L.) are globular, white, and about 2 '5 mm. 

 in diameter. 



Limicolaria numidica Rve., from West Africa, has pale yellow eggs 

 measu/ing 4*5 x 3'5 mm., twenty-two were contained in one specimen 

 examined ; those of L. praetexta Mts. are i"8 x 1*4 mm. ; and in the 

 solitary specimen obtained of Z. saturata Smith the remains of the 

 animal enclosed twenty ovate, white, strong-shelled calcareous eggs, 

 6"5 X 5 mm. An egg of Oxystyla undata Brug., from Florida, in my 

 collection, taken from the body of a dried specimen, is globular, 

 whitish, and 6x5 mm. diameter. Porphyrobaphe fungairinoi Hid., 

 from Ecuador, has elongate-oval, white eggs, 7x5 mm. 



A specimen of CalHstopepla barriana Sow., from Cameroon, opened 

 by d'Ailly, contained fourteen elliptical eggs with chalky-white, granu- 

 late, calcareous shells, measuring 7 x 6'5 mm. The West African 

 genus Pseudotrochus is ovoviviparous. Rang found in an individual 

 of P. alabaster (Rang) fourteen whiti.sh, oblong eggs, and ten young 

 shells ; and d'Ailly took from a specimen of P. solimanus (Morelet) 

 fourteen eggs of a polished and glossy whiteness, measuring 5 x 375 

 mm. Perideris auripigmentum Reeve, from Guinea, has white, oval 



eggs, 5"5X4'5 mm. 



In Subulina the eggs are calcareous and sub-globular. The well- 

 known S. octona Brug. is remarkable for the great development of the 

 female organs, which suggest that those of the female precede the 

 male in functional activity. Immature shells of 6 mm. in length con- 

 tain from four to five white eggs, 2 to 2*75 mm. in diameter, plainly 

 visible through the thin shell, with embryo shells in the anterior 

 whorls. 6*. tortistriata Pils., from Senegambia, has yellowish spher- 

 oidal eggs. Prosopeas tchehelense de Morgan has exceedingly large 

 eggs for the size of the animal. In Euonyma platyacme M. and P., 

 from Pondoland, the eggs are globular, white, 3 mm. in diameter, and 

 show plainly through the semitransparent shell. Curvella delicata 

 (Taylor), from Zanzibar, has been found to contain three or four large 

 calcareous eggs. C. crosbyi Burnup, from Zululand, has nearly 

 spherical, white, hard-shelled eggs, i "3 mm. in diameter. Specimens 

 of Pseudopeas eugens (d'Ailly), from Cameroon, contained perfectly 

 spherical white eggs, arranged in a single series in the oviduct, visible 

 through the shell. In Glessula singhurensis Blanford and in G. cas- 

 siaca Bens., from the Naga Hills, India, Blanford found small, round 

 calcareous eggs, and concludes that this genus is ovoviviparous. 

 Obeliscus sylvaticus Spix, from Cayenne, has a round, white egg, 2 mm. 

 in diameter. Von Martens found in a specimen of Leptinaria striosa 



