Bibliographical Notices. 435 



graving). The following is the character of the genus EoUdina : 

 " Four tentacula ; eyes at the base of the posterior tentacula ; bran- 

 chice arranged symmetrically in transverse rows on each side of the 

 median line ; anus posterior, dorsal ; genital orifice on the right side, a 

 little in advance of the posterior tentacula ; foot large, enlarged in 

 front, extending beyond the body behind." "Species, E. paradoxum. 

 Superior legs slightly prominent ; anus very small ; genital orifice 

 not very evident ; two reddish-brown eyes ; anterior tentacula twice 

 as large as the posterior ; colour variable (pale orange or gray). 

 Length ten to twelve millimetres. Inhabits coasts of Normandy 

 under stones at low-water." The author describes its anatomy and 

 physiologj-- at length, and concludes by a consideration of its zoolo- 

 gical relations. This is a memoir of very great interest, and should 

 be carefully perused by every British malacologist. — An extract from 

 a work by M. Matteucci on animal electricity. 



Botany. — M. Gustave Thuret on the locomotive organs of the 

 spores of Algae. By the employment of opium and iodine the au- 

 thor has been enabled to arrest and examine the ciliary organs which 

 cause the sjiores to move. Of these organs he distinguishes four 

 types. The most simple is seen among the Confervpe, in which the 

 extremity of the spore, unprovided with endochrome, forms a rostrum, 

 bearing two cilia or filiform tentacula, slightly exceeding it in length. 

 The motions of these spores recall those of the animalcule which 

 are found in the anthers of Ckara. Light aflFects them. There is a 

 rose-coloured point near the rostrum like that seen in certain Infu- 

 soria. A second form of spore is seen in Ck<£tophora elegans, the 

 spores of which are provided with four cilia. A third type is met 

 with among the ProHferce, in which the spores are oval, with a rounded 

 rostrum bearing a crown of filiform tentacula. A fourth is seen in 

 Vaucheria, in which the spore is an ovoid vesicle entirely clothed 

 •with cilia. M. Thuret gives an interesting account of the germina- 

 tion of the spores, confirming the observations of Unger, and shows 

 that many species of Vaucheria are varieties of one form. Good 

 plates accompany this paper. — Monographia Lycoperdineorum, by 

 Dr. Vittadino (in the Turin 'Transactions'). — Monograi^h of the 

 genus Spartium, by M. Spach. Ten species are enumerated, of 

 which nine are African (mostly from the Canaries) and one common 

 to Africa and Asia. — Observationes in Acanthaceis Horti Vratisla- 

 ■viensis, by Nees ab Esenbeck (from the 'Linneea'). — Karelin and 

 KirUow on new genera of Russian plants (from the ' Bulletin' of the 

 Moscow Society). — Description of Zamia Loddigesii (Z. serrulata, 

 Catal. Loddig. n. 1841), by M. Miquel. — Baron Melicocq on the ve- 

 getation of the banks of the Aleuse. — Review of AI.Holandre's 'Flora 

 of the Moselle.' 



June. — Zoology. — M. KoUiker on the seminal fluid of Crustacea 

 and Cirrhipeda (translated from the author's essay published in 

 German). — Extract from the memoir by AIM. Dumas, Boussingault 

 and Payen, on the Origin of Fat. — Ruber's paper on the larva of a 

 Lyda (see 'Annals,' May 1843). — M. Costa on the integuments of 

 SynaptcB, 



