276 Transactions of the Society, 



sp., with several apertures, which is very possibly an example of 

 the spiral initial portion of our species (fig. 37). No details are 

 furnished in the text, and we are unaware of the locality from 

 which the specimen was obtained. Dr. Ehumbler has reproduced 

 the figure in his Zusammenstellung (supra), and refers to it as a 



Fig. 37. 



frequently observed abnormality in which the later developments 

 of the plan of growth give an impression of polythalamous 

 structure. 



On the same plate (figs. 8 and 9) Brady figures two distorted 

 specimens also attributed to C. foliacea which Dr. Ehumbler in his 

 Zusammenstellung has taken as the types of a new species, Cornu- 

 spira primitiva Ehumbler. These might at the first glance be con- 

 sidered identical with our species, but a closer inspection shows 

 that they have no feature in common except their irregular appear- 

 ance. The characteristic constrictions and striolations are lacking, 

 and we think with Brady that the specimens are only abnormal 

 growths such as occur in every species. We have seen similar 

 monstrous forms in some of the ' Goldseeker ' dredgings. 



Cormis'pira diffusa may perhaps be regarded as isomorphous 

 with the equally anomalous and variable arenaceous type Psam- 

 monyx vulcanicus Doderlein * from Sagami Bay, Japan, 185-370 

 metres. 



* L. Doderlein, 1892, Verb. d. Deutsch. Zool.-GeselL, p. 145. See also 

 Ehumbler, Zusammenstellung, op. cit. 



