No. 5.— Notes on the Anatomy of Corbiculade (Mollusca), and a 
Translation from the Danish of an Article on the Anatomy of 
Cyclas (Spheerium) by JACOBSEN. By TEMPLE PRIME. 
Bur little has been written on the anatomy of Corbiculade. Gray 
(1853)* gave a description of the soft parts of the genera Corbicula, 
Batissa, Cyrena, Spherium, and Pisidium; but these notices do not 
come strictly under the head of anatomy. 
The first truly anatomical article we have on this family is one pub- 
lished (1828) + by Jacobsen of Copenhagen, on the anatomy of Cyclas 
(Sphærium) cornea. This memoir being in Danish has necessarily been 
accessible to but few, and I have thought it would not be ill-judged to 
have it placed before our naturalists, and consequently have translated 
it into English. This article, I will add, was reviewed, in 1830, in the 
twenty-third volume of the Bulletin des Sciences Naturelles. The next 
article we have is the development of Cycas calyculata (Sphcerium 
lacustre) by Oscar Schmidt, in 1854 ; following upon this, we have the 
anatomy of Cyclas (Spherium) cornea, by Franz Leidig in 1855;f both 
these articles are also too little accessible, and at some future time I 
propose translating them. 
Mr. Fischer of Paris, in 1863, $ published the anatomy of Corbicula 
Largillierti. This article was translated into English in 1867 ;|| the same 
author published, in 1872,81 an article on the anatomy of Cyrena Caro- 
liniensis and of Cyrena Floridana. 
The articles enumerated under the heads 6-9 also give incidental 
notices concerning Spherium and Pisidium. 
As far as my information goes, this is all that has been written on this 
subject. 
Summary. 
1. Cycladens anatomiske Undersógelse. L. Jacobsen, K. Dansk. Selsk. 
Naturvid. Afhandl. Vol. III. 1828, pp. 303 — 323, Pl. 
2. Ueber die Entwicklung von Oyclas calyculata, Drap. Oscar Schmidt, 
Miiller’s Archiv, 1854, pp. 428 — 438, Pl. XVI, 
* Brit. Mus, Cat. Conchif. 
1 Proc. Royal Danish Soc. Nat. Sci, Vol. III. 
i Müller's Archiv. | Ann. Lyc. N. H. N. Y. Vol. VIII. 
$ J. Conchyl. Vol. XI, Y Ann. Lyc. N. H. N. Y. Vol. X. 
