PLATE XXXVIII. 



Fig. 



1 a, lb. Pleurotomaria actinomphala, Deslongchamps, var. abbas (obtuse variety). 

 Concavus-bed, Bradford Abbas. Base and front. (Page 433, et seq.) 

 N.B. — These figures represent two aspects of the fresh adult, where 

 strong traces of the actinomphaloid character still remain. 



2. PI. actinomphala, Deslongch., var. abbas. Concavus-bed, Bradford Abbas. 



Three aspects of the early stage of one of the more rugose forms. 



3. PI. actinomphala, Deslongch., var. abbas. Concavus-bed, Bradford Abbas. 



Two aspects of the early stage of a smoother form, which is rare in 



the young shells. 

 4 a, 4&. PI. actinomphala, Deslongch., var. abbas. Concavus-bed, Bradford Abbas. 



Two aspects of the last stage where the actinomphaloid character is 



entirely lost, and the shell is smooth in the base, growth-lines alone 



being visible. 

 5. PI. actinomphala, Deslongchamps (acute variety). Concavus-bed, Bradford 



Abbas. Base. (Page 434.) 



