Quarterly Journal of Conchology. 99 



The third chapter is a consideration of the moUusca in time and 

 includes a table of geological formations, one of the characteristic 

 genera, one showing the range of genera in time, a similar one for 

 families, and one of the development of families, genera and species 

 in time. The various phenomena of geological distribution are 

 discussed and the chapter concludes with a numerical estimate of 

 recent and fossil forms in every group and family. 



The fifth chapter, on collecting shells, gives the various methods 

 in use for that purpose, forms of dredging-papers as filled up by 

 McAndrew in Norway and by Forbes in the ^gean Sea, remarks 

 on their distribution in depth, and preservation for purposes of 

 study. 



The second part, which is much the largest portion of the work, 

 is a synopsis of the known genera. Under every genus is given the 

 etymology of its name, its synonymy, an example named, usually 

 the typical species, the generic characters as shown in the animal 

 and shell, the distribution of the genus in space and the number 

 of known recent species, concluding with the distribution in time 

 and the number of known fossil forms. Woodcuts are freely inter- 

 spersed with the text and numerous species are figured in the 

 plates. The appendix, by Prof Ralph Tate, is intended to bring 

 the work up to the level of science, by incorporating all new mat- 

 ter which has accumulated since the publication of the original 

 work, and is worked out in the same manner as the body of the 

 book. Having looked through the two editions, we do not find 

 that the third edition differs from the second; they both however 

 differ from the original one, not only by the addition of Tate's ap- 

 pendix but also by the omission of the part relating to the Tunicata, 

 which originally formed part of the work. 



''Rambles in Search of Shells^ — Land & Freshwater." 



By James Edmund Harting, F.L.S., F.Z.S. — 106 pp., 8vo., with 

 10 plates of colored figures of Shells — Price 7/6. London, 1875, 

 Van Voorst, Paternoster Row. 



This little work, consists of a series of articles reprinted 

 from "The Field" with the addition of 10 plates containing colored 

 figures of a number of British shells. In addition to the introduc- 

 tion and conclusion the work contains six chapters. The introduc- 

 tion consists of a brief and concise sketch of the internal organiza- 

 tion of the mollusca and remarks upon their systems of respiration, 

 locomotion and reproduction. 



