bibliographical Notices. 291 



Fig. 2. Showing the appearance of the Amceba when moving slowly, the 



villi being employed as organs of prehension. 

 Fig. 3. The same, when advancing energetically, the villous patch being 



aggregated into a subspherical tuft, and the contractile vesicle 



and nucleus now sharing in the general protoplasmic circulation. 

 Fig. 4. A specimen with two large Pinnulari<B in its interior, the upper of 



the two frustules being enclosed within a large vacuole. 

 Fig. 5. A specimen in which the villous patch has assumed a brush -like 



shape, and is supported on an elongated pedicle of sarcode; 



5 X, an enlarged view of this tuft and its supporting pedicle. 

 Fig. 6. Enlarged view of granular nucleus, nucleolus, and the nuclear 



vesicle or cavitj-. 

 Fig. 7. Contractile vesicle, showing appearance of reticulation. 



BIBLIOGRAPHICAL NOTICES. 



The Land and Freshwater MoUusks indigenous to, or naturalized 

 in, the British Isles. Bv Lovell Reeve, F.L.S. Reeve & Co., 

 1863. 



Only a few months have elapsed since we had occasion to notice the 

 publication of the first volume of a new work by Mr. JeiFreys, on 

 British Conchology, which treats of the Inland MoUusca ; and already 

 another handbook on the same subject lies upon our table. 



The valuable illustrated works on 'Conchology' by Mr. Reeve are 

 •well known, and more especially his splendid 'Conchologialconica;' 

 but, until we read the announcement of the intended pubhcation of 

 the work which we are about to review, we were not aware that the 

 author had paid any special attention to the Mollusca of our Islands. 

 We cannot therefore expect to find in this volume the same mass of 

 interesting detail which long years of patient and special study have 

 enabled Mr. Jeffreys to condense in the pages of ' British Concho- 

 logy.' On the other hand, however, 'The Land and Freshwater 

 Mollusks' is more fully illustrated, and the woodcuts of all the species 

 offer an attraction which Mr. Jeffreys' s volume does not possess. 



The animals are engraved by Mr. O. Jewett, some from original 

 drawings, while others are reproductions of previously published 

 figures. The original drawings from the life, which may be recog- 

 nized by Mr. Jewett' s autograph, are admirable. We were not pre- 

 viously acquainted vrith this artist's name as a natural-history 

 draughtsman ; but such hfe-like and characteristic figures as those 

 of Limax Soicerbyi, fiaxnis, and cinereus. Helix aspersa, Planorbis 

 comeus, Paludina contecta, Dreissena polymorpha, Anodonta 

 cygnea, and IJnio tumidus raise him to a high position among 

 delineators of Mollusca. Unfortunately the same praise cannot 

 be bestowed on Mr. Sowerby's figures of the shells ; for while the 

 woodcuts of the larger species are generally good, no trouble appears 

 to have been bestowed upon the smaller and closely allied species ; 

 and thus in those very instances where accurate illustrations were 

 most desirable and would have been of most value, we meet with en- 

 gravings which are npt only worthless, but calculated to mislead. 



