REVIEWS. 



55 



Text-book of Comparative Anatomy by Dr. Arnold Lang, translated 



by Henry M. Bernard, M.A., and 'Matilda Bernard, Part III., 



London (1896) Macmillan & Co., Chapter i, Mollusca, 283 pages 8vo, 



222 Figures, Bibliography (17/- nett). 



In the last number of The Journal (p. 27) It was stated that the 



moUuscan portion of this volume (in which also the Echinodermata and 



Enteropneusta are described) is an improvement on the original German 



edition in-so-much as it "has been revised by Mr. B. B. Woodward and an 



index added," and is, as it stands, "undoubtedly the most reliable and most 



up-to-date text-book of molluscan morphology." 



"Fig. 26.' Anatomy oi Cardium tuhcyculatum left aspect (after Grobben, 

 Leuckart and Nitsche, Zool. Wandtafeln) /., foot ; go., gonad ; S., shell ; Pa., 

 mantle; os., labial palps; 0., mouth; M., anterior adductor muscle; oe., 

 oesophagus ; m., stomach ; /., digestive gland ; (/..intestinal canal ; go.^., genital 

 aperture ; 110^., pericardial aperture of the kidney ; V., ventricle ; At., auricle; 

 P., pericardium ; no., aperture of the kidney in the mantle ca\ity ; ;(., kidney ; 

 il/.j-, posterior adductor ; Bl., point of concrescence of the right and left 

 ctenidia behind the foot ; a., anus ; Ah., anal chamber of the mantle cavity 

 with anal siphon .^s. ; Bk., branchial chamber of the same cavity with 

 branchial siphon Bs. : Bi\, ctenidium. 



The book consists of a systematic review to begin with (see next page for 

 classification adopted) but the main portion is devoted to sections having an 

 organ or s\ stems of organs for a heading under which each class is discussed 

 in turn, while interspersed are other no less valuable divisions dealing with the 

 primitive mollusc, phylogeny, ontogeny, parasitic and attached gastropods, 

 and an exhaustive attempt to explain the asymmetry of the gastropoda. By 

 the kindness of the publishers one is able to give three figures which are 

 typical of the treatment accorded to general anatomy ("Fig. 26") to com- 

 parative anatomy (" Fig. 14") and to external characteristics (" Fig. 13.") 



