3 



THE JOURNAL OF MALACOLOGY. 



Established in iSgo as ''The Conchologist, a Journal of Malacology." 



No. 3. SEPTEMBER 29, 1905. VOL. XII. 



Contents. 



Page 



Notes on a Collection of Californian Nudibranchs. 



By Professor T. D. A. Cockerell and 

 Sir C. Eliot, K.C.M.G. 31 



The Genus Caiaiilim, with descriptions of new forms. 



By E. R. Sykes, B.A. 54 



Bionomical Considerations in Gastropod Evolution. 



By Prof. J. K, Ainsworth Davis, M.A. 58 



Current Literature. 64 



WATSON'S MICROSCOPES FOR BACTERIOLOGY & HISTOLOGY. 



' H' EDINBURGH STUDENTS' £ s. d. 

 MICROSCOPE, as figured, having 

 Mechanical Stage and Compound 

 Substage _ 9 12 6 



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 ives, Abbe Illr. , with Iris Diaph- 

 ragm, and Mahogany Case ... 15 o o 



FOR BACTERIOLOGY :- 



1/12 in. Oil Immn. Objective i.io NA. 400 



„ 1.30 NA. 500 



Triple Nose-piece, dustproof ... 100 



This Microscope may be had on a horse-shoe 

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In no Microscope, and at so low a price, are so many conveniences ana 

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HiEMACYTOMETERS, PAKES COVER GLASS CLIP, 



H/EM AGLOBINOMETERS for Blood Examination. Bacteriological Outfits. 



Full particulars of all the loregoing are contained in Watson s Catalogue of Microscopes, 

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MICROSCOPIC OBJECTS.— Typical Histological and Pathological Preparations. Sets illustrating 



Public Health, Bacteria, Urinary, Entozoaar.d other Subjects Catalogue of above (No. 3) 



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W. WATSON & SONS, 



Opticians to H,M. Government. Ksiablished 1837. 



2, EASY ROW. BIRMINGHAM, and 313, High Holborn, London, W.C. 



Please utention tliis Jouviuil trheu rtj_tUjiiuj to Adcertisements. 



