NOTICES OF SERIALS. 219 



The Quarterly Journal of Microscopical Science. No. 8, July. Edited 

 by E. Lankester, M.D., F.R.S., and G. Busk, F.R.S., F.R.C.S.E. With wood- 

 cuts and lithographic illustrations. London : Samuel Highley. 1854. Price 

 4s. 



(Jabez Hogg) Observations on the Development and Growth of the Water 

 Snail (Limneus stagnalis), with a plate. This paper was read at the meeting of 

 the Microscopical Society, on March 29, 1854. A Limneus, placed in a glass 

 vase, was observed to deposit, very slowly, through a fissure, near its ventral aper- 

 ture, a small, gelatinous sac, filled with transparent specks, at the same time 

 firmly glueing it to the glass. This sac contained fifty-six ova ; each egg was of an 

 ovoid form, and consisted of a pellucid membrane, filled with a transpai-ent fluid, 

 having a very minute, yellow spot adhering to one side of the cell wall. Viewing it 

 on the second day, the yolk had a central spot or nucleolus ; on the fourth, it had 

 changed its position, and doubled in size ; from the sixth day it commenced to move 

 round the interior of the cell ; on the eighteenth, the tentacle was visible, with a 

 small, black speck at its root — the eye ; from the twenty-seventh to the twenty- 

 eighth day, the little animal was actively engaged in making its way out of the egg, 

 which it did, leaving its shell behind in the ova- sac. As soon as the gastric teeth 

 are properly matured, the cilia that surround the extreme edge of the tentacle — 

 no longer wanting— fall away. Speaking of the cell, Mr. Hogg says — " In this 

 one fact — viz., that the primordial wall does not enter into the formative process of 

 the embryo — are we not furnished with a well marked or broad line of demarcation 

 between that of animal and vegetable life ? In the development of the animal the 

 cell wall takes no part in the formation process ; in vegetable life, it enters largely 

 into the formation process and ultimate development of all its tissues." (W. Gre- 

 gory, M.D.) Observations on some Deposits of Fossil Diatomaceae ; (F. Wenham) 

 On the Aperture of Object Glasses ; (J. Gorham) On the Magnifying Power of Short 

 Spaces ; (Rev. S. G. Osborne and J. Hogg) On Closterium Lunula ; (F. Currey; 

 On two new Fungi, with a plate. Translations — (Professor H. Hoffman) On 

 Contractile Tissues in the Hymenomycetes ; (Dr. A. Braun) On some new or 

 little-known Diseases of Plants caused by Fungi ; (R. Virchow) On Chromato- 

 phores in the Frog ; (C. T. V. Siebold) On the Transformation of Cysticercus 

 pisiformis into Taenia se; rata ; (Dr. Eugenberg) On a Black Fur on the Tongue. 

 Reviews ; Notes and Correspondence ; Proceedings of Societies. 



The Zoologist. No. 141, July ; No. 142, August ; No. 143, September. 8vo. 

 London : Van Voorst. Price Is. each. 



No. 141, July : — (R. F. Tomes) Critical Observations on the Notch-eared Bat 

 (Vespertilio emarginatus). We have here a record of every notice that has appeared 

 of this bat, from the one by GeofFroy St. Hilaire, in the eighth volume of the 

 Annales du Museum d'Histoire Naturelle, to some observations by G. B. Bucton, 

 F.L.S., to the Linnean Society, in December, 1853. By the inspection of 

 many specimens, descriptions, and figures, the author is of opinion, that the V. 

 emarginatus of British Naturalists may be a variety of either V. mystacinus, 

 V. Nattereri, or V. Daubentonii — at the same time, he considers the V. emargina- 

 tus of Baron de Selyf Longchamps (a European species) to be a perfectly good 

 species. (0. Pickard, Cambridge) Occurrence of the Hoopoe and Oriole, near 



