CALYPTRIDJi. 363 



Syn. Phonis, Montf. Xenophorus, Phil. 



Ex. X. solarioides, Reeve, pi. 40, fig. 2. Operculum, 

 X. solarioides, fig. 2, a, 2, b. Shell, X. trochiformis, Born, 

 fig. 2, c. 



The " Carriers" inhabit deep water, and are most 

 numerous in the Java and China Seas. Each species 

 appears to have its own peculiar method of collecting the 

 fragments of shells and stones which cover the ground 

 where it lives, and each cements to the outside of the 

 shell its particular kind of materials. The adventitious 

 pieces of shell are so disposed as not to curve downwards 

 beyond the edge of the shell so as to impede the progress 

 of the animal, but are usually placed with their concave 

 sides uppermost. 



Species of Xenophora. 



cerea, Reeve. solarioides, Reeve. 



corrugata, Reeve. trochiformis, Born. 



pallidula. Reeve. 



Fam. CALYPTRID^. 



Lingual dentition as in CapulidcB. Head large, trans- 

 verse ; muzzle slightly produced, furnished anteriorly 

 with buccal appendages ; tentacles short, subulate, eyes 

 small, on bulgings at their external bases. Mantle con- 

 siderably developed, lining the shell, simple-edged in 

 front ; branchial plume single, placed obliquely across 

 the mantle-cavity. Foot flat, expanded. 



Operculum none. 



Shell patelliform; apex more or less spiral (in the 



