Dexfral Form 



Sinistral Form 



Actual widtbct wt'orl 



ivifh allow' OfiocjDiamctcr 

 fordisfcrrion 



inc m. 



'iV 



, I m c . 

 4-.6 



5.'^xl05 



7.0x15.3 



78x22.1 



98/ 



88 

 9.0 



9.0x271 



9.5x273 



98 

 9.8x28.0 



Wi5lih cf 

 •whorls at 

 K.I. 055 



5.0 



5.27 



5.55 



5J85 

 6.17 



650 



6.86 



7.24 

 76+ 



806 

 850 



998 



iao6 



11.18 



Actual widltllDia merer In c.m. 

 Cf-whorlincm|otrer 6 



- _ ' l-y coTofjufaObrv, 



a2v9.4 



5.3x1,'J 



3.6x12.3 



5,6xa2 

 6.1xMt6 



6.6x e.4 



10 



d5x2a2 



102x2IB 

 a9x25.0 



10.4x2.0 

 ?tQ5x25.5 



21 



12.0 



hu commutation 



22./ 



270x31.8 



Fig. 1.— Diagrammatic reconstructions of dextral and part of sinistral form of 

 Dinocochlea ingens, B. B. Woodw. 



