86 
tab. XVI. f. 1.) from a more perfect specimen, as far as 
regards that part ; but there seems to be less of the shell 
attached to it. Is it possible that it belongs to the pre- 
sent species, and not to the one he refers it to ? especially 
as it appears, that only some specimens were thus 
inflated. We are not acquainted with the tube of O, 
gigantea. 
