20 NOTICES OF SERIALS. 



shells is an excretion of the cells : the young Spongilla, soon after the attachment 

 of the embryo has taken place, acquires a tubular process, with an aperture that 

 can be closed, out of which solid substances are expelled in the liquid current ; 

 besides this there is at least one place at which foreign substances are occasionally 

 taken up ; otherwise the body of the young Spongilla is impervious : in the fully 

 developed Spongilla ciliary cells occur: the spicular substances are not the 

 internal skeleton of the Spongilla, but a frame which it can leave under certain 

 circumstances; this often occurs before the Spongilla dies, and also during the 

 formation of the gemmules; the gemmules are not eggs, but rather a sort of 

 cysts or houses, out of which the same creatures which have formed them escape 

 again through the pore. Immediately after their escape, and even just before it, 

 division of cells and formation of new spicules takes place. The Spongillse, 

 after they have emerged, acquire tubular processes ; they either attach them- 

 selves to the frame in which the containing gemmules were fixed, and live as 

 colonies upon it ; or each individual forms a new frame, in case the gemmule 

 was no longer in that position, when its inhabitant escaped from it ; the corpuscles 

 considered as the eggs of the Spongillse have, besides the germinal granules, a 

 germinal vesicle and spot, of which there is no trace in the ordinary conglome- 

 rations of germinal granules : the bodies considered as Spermatozoids are deve- 

 loped in immoveable capsules, and in their essential characters do not differ from 

 those of many other animals. (Schultze) Observations on the propagation of 

 the Polythalamia; with a plate — p. 165-173. With reference in particular to a 

 Triloculina and to Nonionina sillcea. 



The concluding Part for 1856, which should contain the Eeport on the pro- 

 gress of Zootomy, has not yet come to hand. 



LlNNAEA, EIN JOURNAL FUER DIE BOTANIK IN IHREM GANZEN UmGANGE. 



Linnaea, A General Botanical Journal. Edited by Schlechtendahl. 

 Vol. X. Parts V., VI. 1854. 

 (Schlechtendahl) Catalogue of the species of Panicum, in Kunth and Steu- 

 del; with Observations on the genus— p. 5S9-602. (Bentham) The plants 

 collected in Australia by Mueller ; Mimosas ; with the addition of some new 

 Australian species, collected by Drummond and others — p. 603-630. (Schleoh- 

 tendahl) The plants collected in Columbia by Wagener; continued; JJicotyleae 

 — p. 631-674. (Willkomm) On the Alterations which the composition and 

 physiognomy of the vegetation of the Iberian Peninsula has undergone through 

 the agency of man during the middle ages and in later times — p. 675-704. 

 (Preuss) Synopsis of Fungi examined, chiefly from the environs of Hoyers' 

 werd a ; continued — p. 705-725. (Schlechtendahl) Botanical Miscellanies — p. 

 726-734. New plants and Memoranda of Botanical Gardens, for 1852 — p. 735- 

 ,766. (Rach) The Ericacea of Thunberg's collection, compared with those of 

 the Boyal Herbarium at Schceneberg near Berlin — p. 769 792. Index — p. 

 793807. 



Jahrbuecher des Vereins fuer Naturkunde im Herzogsthum Nassau. 



Annals of the Association of Natural Science in the Duchy of Nassau. 



8vo. Wiesbaden. Part X. 1855. 



Additions and Corrections to the Catalogue of the Lepidoptera of the environs 

 of Wiesbaden, in part VI.— p. 87-126, 356-360. (Schenck) On some difficult 

 genera and species of bees — p. 137-149. Remarks on the varieties of some 

 species of BomLus ; and on the species of the g. Coelioxys, which occur in 

 Nassau, with an attempt at assigning the sexes to their proper partners. (Same) 

 On the ant named Eciton testaceum in part VIII., Strongylognathus testaceus 

 Mayr — p. 150. (Same) Index to the descriptions of the bees of Nassau in 

 Parts VII., IX., X.— p. 151-160. (Kirschbaum) Contributions to the History 

 of the Hemiptera. I.: Capsini of the district of Wiesbaden— p. 161348. An 

 hundred and fifty four species of the family are enumerated and characterized 

 after the analytic methou ; vthile very full descriptions are givtn of thirty new 



