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330 330 BIBLIOGRAPHY.

Komee (E.) Beschreibung neuer Venus- arten. Mai. B. iv. p. 148. Voit, Cael. — Anhaltspunkte fiir die Physiologie der Perl-Muscheln.

Z. W. Z. x. 470. Vrolik.— Rapport sur le Taret. A. S. N. xiii.

4. Molluscoida.

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Catalogue of the Polyzoa, collected by J. T. Johnson, Esq.

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Contain : 1. On the Sexual propagation of Medusae by Medusae.

2. On the " Haus" of Appendicularia. M. Claparede noticed this structure universally in Appendicularia Cophocerca, taken abundantly in Lamlash Bay. He describes it as resembling a very transparent bivalve shell of an oval form. That it is not a nidamental organ, as suggested by Albnan, is shown by its occur- rence, in M.Claparede's experience, only in males.

3. " Die hutformige Larve." Amicroscopic creature, shaped like a Erench officer's cap, the concavity and lower border are covered with cilia. The lower border is toothed and marked with reddish granules. Erom the middle of the concavity projects a bundle of about 40 long setae, which the animal has the power of spreading out or closing together. Each seta is bulbous at the free extre- mity and beset with short spines. M. Claparede thinks it pro- bable that the creature represents an Annelid Larva.

Hincks, Thos.— Descriptions of new Polyzoa, from Ireland. Q. J.

Mic Sc. (Zoophytology), viii. p. 275. Houghton, W. — Note on JFredericella Sultana, being found in the

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the Linnean Society, Dec. 1, 1859). On the Anatomy and Development of Pyrosoma. Linn.

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Doliolum. Wiegm. Arch. I. 1860. p. 334. (from Gott. Nachr.

1860— No. 23, 25-26.) M'Gilliveay, P. H. — Notes on the Cheilostomatous Polyzoa of Vic- toria and other parts of Australia, (plates). Vict. Trans. I860, p. 159.