272 SUPPLEMENT 
In his polytoma, or multivalves, he places at once the echini 
and balani. 
In 1711 Rumph made known a tolerably great number of 
shells from the Indian seas; but he made no great addition 
to conchology, properly so called. He did not even separate 
the bivalves from the multivalves. As for the rest, in his 
work the univalves are simple or turbinated, as in Aristotle. 
It must not be forgotten, however, that he has pointed out 
some generic sections tolerably good, as the strombi, porce- 
laines, volute, &c. 
A little later, in 1722, Langeius proposed a new concholo- 
gical arrangement, but a partial one, as he treated only of 
marine testacea, in a work in 4to., published at Lucerne, 
under the title of Methodus nova et facilis Testacea Marina 
pleraque, que hue usque nobis nota sunt, in suas debitas et 
distinctas classes, genera et species distribuendi, nomini- 
busque suis propriis, structure potissimim accommodatis, 
nuncupandi, &c. But it is certain, notwithstanding this 
pompous announcement, that he has added no very new con- 
siderations to those which had been already employed by 
Lister, unless perhaps that which is derived from the equality 
or inequality of each valve, or from the relative position of 
the summit or head. He also pays a little more attention to 
the form of the aperture in the univalves, and to that of the 
head in the bivalves. He also establishes among these last a 
division of anomalous species. 
It is to J. Philip Breynius, in 1730, that we owe the 
employment of a new character, hitherto unobserved, namely, 
that derived from the number of chambers in the univalve 
shells, from whence the names of polythalamous and mono- 
thalamous. ‘This he performed in a work published at 
Dantzic. 
A little before him, in 1728, J. Ermest Hebenstreit pub- 
lished at Leipsic a dissertation, De Ordinibus Conchyliorum 
13 
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