MOLLUSCA. 
533 
Classification. 
Prof. Huxley adopts, in his ' Introduction to the Classification 
of Animals/ 1869, 8vo, pp. 33-40 and 82, the following classes 
of molluscous animals : — Lamellibranchiata, Branchiogastropoda, 
Pulmogastropodaj Pteropoda, and Cephalopoda, and gives a con- 
densed account of their chief anatomical and morphological 
features. The Ascidioidea, Brachiopoda, and Polyzoa are re- 
garded as distinct classes, forming another chief division of the 
animal kingdom, the Molluscoidea, as was proposed many years 
ago by Milne-Ed wards. 
Systematical Nomenclature, 
A committee of three North- American conchologists, Tryon, 
Gahb, and Beadle, has examined the question, whether priority 
can bo asserted (as is done by Dr. Is. Lea) from the date of read- 
ing a paper before a learned society, or from the time of actual 
publication of the printed part or volume containing the paper; 
and the committee recommends to acknowledge the former claim 
of priority for papers of past times, in which the publications 
of the learned societies were not so rapid and regular as they 
are now. Am. Journ. Conch, v. pp. 3, 4. 
The names given by Ilelbling, 1779, and Da Costa, 1778, ' 
to a number of shells, are reviewed by the Recorder, who 
comes to the conclusion that those of Ilelbling ought to be 
maintained, being regularly binominal, and accompanied by 
descriptions and recognizable figures. As to those of Da Costa, 
some objections can be raised, chiefly because he arbitrarily 
changed the Linnean names of genera as well as of species ; 
but the great majority of his names in the ^ British Concho- 
logy^ are quite in accordance with zoological rules, and the 
names of those species to which no older name is applicable 
may be maintained. This number, however, is not large, as 
O. Fr. MiilleFs ^ Historia Vermium^ and ^Prodromus zoolo- 
giae Danicse ^ are older ; and Born^s ^ Index,^ published in the 
same year as the ^ British Conchology,’ contains almost all the 
names and descriptions which are to be found in the larger and 
more generally known work of the same author, ^ Testacea musei 
C«Tsarei.^ Martens, Mai. Blatt. xvi. pp. 234^263. 
Collections. 
Sorqe historical notes concerning Lamarck’s collection of 
shells are given by Gray, Ann. & Mag. Nat. Hist. hi. pp. 519- 
521. It is now transferred to Geneva, Journ. Conch, xvii. 
p. 208 . 
