scmxcH-Gossir. 



1-49. 



61. 

 62. 



63. 



64. 



69. I'. 



70. !■. 



Ml. 



Ciossli', 



Hills, 

 Hills, 



74- 

 75- 



I', nlplioiisi, llesli. Mdupiii, l^. Tilifl. 

 r. imiratii, Ik'iulc. 'IVtiL-n- !<(.■■ >ii. 

 r. culisculpla, Mllclff. iMul-Shicn. 

 P. invia, Ikuili-. Tchen-Kcoii. 

 P. Sfc'iira, llfiiik-. Kouang-Si. 



65. 1'. niullispira, Mlldfl. I loo- Nan. 



66. 1'. s<-hislii|>lycliia, MlldtT. lIooNaii. 



67. I', vallata, iliiide. Tclicn-Kuou. 



\I. Section K\iKROiM.,\x, n. sec. lyiic /'. 

 i/iiadrasi. Dfxlral. 



Habitat : I'tiilippinc Islands. 

 i.S. P. trochospira, MllillV. Vx-Un : Si<iiiic'i. 

 V. lioholensis. Guile-. Bdlml. 

 i|ua(lrasi, Mlldtl. Luzon, 

 polyptycliia, MlldtV. Cclm. 



Sfi'liDii -SvKKsiA, Gude (1S97). -Si ll■.M'l•'.• 

 ^'..S. iii., p. 332. AlsiKM.v, Gude ik, 

 p. 300, pre-occupied by Ncvell (1S7SI. Typo, /'. 

 tlathialiila. Dextral, shell translucent, ai-ulely ki-elod. 

 Ilaliitat: SoulliLrn India. Ceylon. 



71. 1'. letifera, ITr. Nilgiri and Shevrui 

 .So. India. 



72. P. clalliralulciides. Gude. .Vnarnialai 

 So. India. 



73. P. clathratula, I'I'r. Ceylon. 



piileoliis. Hell'. 



fiiilioliis, Bens. 



V. conipressa, Sykes. Ceylon, 

 caliginosa, Sykes. Ceylon, 

 biciliata, I'fr. Ceylon. 



I strongly suspect tlial when the anatomy of the 

 Philippine species (.Section l^nteroplax) is investigated 

 the group will he found to differ so widely from 

 typical /'/(■(■/(>/)■//>■ that it will have to be rai.sed to the 

 rank of a separate genus. The same may prove to be 

 the case with the section Sykesia. It is somewhat 

 diflicult to hazard an opinion as to the primordial 

 form from which the present species of Plectopylis 

 have been evolve<l as no fossil forms are known, and 

 likewise it is almost impossible to judge .as to 

 which of the known forms are the most archaic, 

 for the armatures of immature specimens, as 

 far as they have come under ni)- observation, 

 throw no light on the subject, as they did in the case 

 of Gorilla (c.f. Scikm E-Gossif, N.S. iii., 1896, p. 

 1 28) ; except in size and in the lengths of the folds, the 

 barriers of mature and immature shells of Plectopylis, 

 are almost identical. There is one exception in this 

 respect, i.e., Plec/opylis wuodlhorpci, in which, as I 

 jiointed out (ante p. 16), the palatal folds of the 

 anterior series are only found in mature shells. It 

 may, however, be assumed that the simple armatures 

 preceded the more complicated, and on this assump- 

 tion /'. achalina and hs allies, with their complex 

 parietal barriers, must be regarded as the most 

 recent : w hile in another direcfion, /'. plctlosloiiui 

 and its congeners, with their biserial palatal folds, 

 have presumabi)- been evolved from some monoserial 

 predecessor, of which /'. smivrhyi may be taken as a 

 less modified representative. 



(Tit be concluiir.l. i 



'^:^m^cmt 



' 'BOOK5TOKE;iU,M 



NOTICES IIV JOHN T. CARRINtlTON. 



The History of the European /•'aiiiia. \W K. I''. 

 SillAKri', li..Sc;, Ph.D., K.Z.S. vii. + 364 pp.,. 

 7Ain. X jin., illustrated. (London : Walter Scott, 

 Ltd., 1899.) 6s. 



This is one of the Contemporary Science Series, 

 edited by ilavelock Kllis. The study of the Kuropean 

 fauna is no new subject with Or. Scharff, as he has 

 already written upon it, been criticised, and acknow- 

 ledges the value of criticism. The plan of the work 

 is not so much an attempt to demonstrate the origin 

 of various animals occupying the European region, a.s 

 to draw the attention of those students w<irking in the 

 several branches of the fauna, to the geographical 

 distribution of the Kuropean animals. 'Ihis is very 

 nece.s.sary, as of the two classes of natural science 

 students one meets, whether those working at 

 histology or others on the identification of species^, 

 the knowledge of local distribution with consei|uenl 

 geographical variation, is often singularly limited. 

 The author adopts the useful custom of giving at the 

 end of each chapter a summary of its contents, thus 

 directing attention to the more .salient point.s. There 

 are eight chapters, the first forming the " Intro- 

 duction." followed by " Preliminary Considerations."" 

 Chapter III. is devoted to the " Fauna of Britain," 

 then comes the considera'ion of the " .\rctic Fauna," 

 •' Siberian." and " Oriental Migration." "The Lusi- 

 tanian Fauna," and the "Alpine Fauna," the whole 

 concluding with an extensive bibliography. The illus- 

 trations are useful, as are the maps. In fact, the 

 book cannot fail to extend the knowledge of many 

 amateur students of natural science. 



Lahonilory Manual. By II. \V. Hit. lyer, Ph.D., 

 vi. + 200 pp., 9.iin. X 6in., with diagram.s. (New York 

 and Lon<lon : Macmillans, 1890.) 14.S. 



Dr. Ilillyer, who is assistant professor of organic 

 chemistry in the University of Wisconsin, has written 

 this book for the use of college students of general 

 chemistry. His sub-title indicates " exjieriments to 

 illustrate the elementary principles of chemistry." 

 He divides his work into a treati.se on manipulation, 

 preparation, and properties of elements and their 

 compounds, which constitutes I'art I. Part 11. is 

 devoted to verification of tjuantitive laws. There is 

 an appendix upon gas volumes and ai|ueous vapour. 

 A feature of the hook is that it is printed i>nly on the 

 left hand pages, those to the right being blank for notes. 



Sonlh Coast Quarterly. Edited by Percy 

 Lixiii.EY. 32 pp.. loin. >• 7Jin.. illustrated. 

 (London : 30. Fleet Street, 1S99. 1 2d. 



This elegant ih.ag.azine is is.sued under the auspices 

 of the London. Brighton and South Co.ast Railway 

 Company. It is doubtless intended really as an 

 advertisement of the many beautifid places to be 

 reached by thai line. The illustrations are superbly 

 printed. Mr. Percy Lindley the editi>r, who is 

 already known in connection with tourists' guides, 

 writes descriptive matter with a light touch and' 

 pleasant manner. We would advise our readers to 

 obtain the back numbers, two of which are already 

 issued, as they possess distinct artistic value. 



