130 GUIDE TO THE FOSSIL INVERTEBRATE ANIMALS, 
Gallery Slirpulina \Clava<jclld\ corona fa, iu which a slielly tube is 
formed round the long siphons while the shell-valves 
remain quite small and attached to the side of the tube. 
In addition to the gastropods here figured (Fig. G9), one 
may note the beautiful Voluta Inctatrix, the large JLvp- 
2 )ochre)ies [liostcllaria'] mnp>la, and Xenophora arpjlutinans, 
Fig. G9. — Shells of Eocene marine Gastropods and Lamellibranchs. 
a, Cyprina Morrisi, Thanet Sands of Herne Bay, Kent ; the specimen 
figured by J. de C. Sowerby; the bole is due to a boring animal. 
h, Plioladomya virgulosa, London Clay of Bognor, Sussex ; a small speci- 
men. c, inside, and d, outside of left valve of Crassatelliies sulcatus, 
Barton Beds of Hampshire, e, Cypraea Bowerhanki, Lutetian of 
Brackle.sbam, Sussex. /, Glavalithes longxvii.t, Barton Beds of 
Hampshire, g, the hinge, and h, the outside of right valve of Gardita 
planicosta, a small specimen, Lutetian of Braoklesham. b, c, d, g, h, 
are natural size ; a, e, Sf natural size ; /, J natural size. (Table- 
cases 4 & 5.) 
one of the carrier- shells that become covered with bits of 
stone, shell, and other foreign substances. Among London 
