338 APPENDIX. 



within the fourth or fifth whorl from the 'base, hanging from 

 the upper or parietal wall (pi. 49, fig. 12, p. I.). Immature 

 shells have large but short lamellae on the parietal and basal 

 Cupper and lower) partitions, and an obliquely sub vertical 

 lamella on the axis (figs. 13, 14). The spiral, axial cord con- 

 tinues inward a short distance beyond the vertical lamella. 

 This armature is in the 17th or 18th whorls. 



Length 31, diam. 7.8 mm. 



Length 29.3, diam. 7 mm. 



Length 28, diam. 7 mm., whorls 19 (Angas' type). 



South Africa: East London, mouth of the Buffalo river; 

 Tharvield, living under the sand among bushes (E. L. La- 

 yard) ; Port Elizabeth (Jas. Crawford). 



Subulina (C&liaxis) layardi H. ADAMS and G. F. ANGAS, 

 P. Z. S. Lond., 1865, p. 54, pi. 11, fig. l.Bulimus layardi 

 Ad. and Ang., PFR., Monogr., vi, p. 95. Cceliaxis layardi 

 LAYABD, P. Z. S., 1881, p. 839 (living animal). Bathyaxis 

 layardi ANCEY, Conchol. Exch., ii, 1887, p. 39 ; Journ. de Con- 

 chyl., 1901, p. 223.Sphalerostoma I., GIRARD, 1. c. 1892, p. 

 245-247, and vol. iii, 1893, pi. 1, f. 3, 3a. 



Mr. Layard, who collected living examples, states that it 

 is viviparous; eight or ten minute ones were shaken out of 

 a dry shell. None of those I opened contained young, much 

 to my regret, as the internal armature of the embryonic shell 

 will probably be of high interest. 



Girard found two sets of barriers in a shell opened and 

 figured by him. 



APPENDIX. 



HOMORUS PILEATUS (Martens). PI. 12, figs. 7. 



Shell turrite, subobliquely costulate, with a silky luster, 

 waxen- whi tish ; the apex is obtuse, whorls 9, the first de- 

 pressed, the second subglobose, both distantly and vertically 

 costulate; the following whorls regularly increasing, but 

 slightly convex, the last ovate-oblong, slightly angular below 

 the periphery and more finely striolate there. Aperture two- 



