DENTALIUM. 435 
DEN TALIUM: 
“Exserit animal tentacula in formam infundibuli, retrahit et 
exserit, ea autem non flectit ut Polypi” has been written in the 
revised copy, at the end of the generic definition. 
Bentaliiim elephantiniun. 
The details of the ‘Museum Ulrice,’ where no illustrative 
drawings were referred to, correspond fairly with the characters 
of the well-known Dentalium elephantinum of most writers, a 
specimen of which (Crouch, Int. Lam. Conch. pl. 1, f. 3) is still 
preserved in the cabinet of Linneus, who has recorded his 
possession of an example, and alone in his collection agrees 
with the definition. From the extreme rudeness of the earlier 
engravings of natural-historical objects, representations of many 
tusk-shells that do not answer to the diagnosis in that important 
feature “decemangulata” have been inadvertently quoted by 
our author. The synonymy, then, requires a careful weeding. 
Both the Hs of Argenville and both the 8s of Bonanni are 
now usually regarded as meant for D. rectum ; nevertheless, the 
lower figure of the former, and the upper of the latter, which 
has been copied by Lister (Conch. pl. 547, f. 1, the corrected 
reading in the revised copy), exhibit the general aspect of the 
Linnean shell. The references to the works of Rumphius, 
Gualtier, and Petiver’s Amboyna shells are correct; not so the 
synonyms of Ginanni and the ‘Gazophylacium,’ which last 
should have been printed “53, f. 9” (a copy from Bonanni’s 
cited drawing), and not “13, f. 9.” 
“Testa sulcis 10 magnis fundo striatis” has been added in 
the revised copy of the ‘ Systema.’ 
