54 



WEBB : BRITISH SPECIES OF TESTACELLA. 



in some examples than others, and in a few cases the elbow on 

 the opposite side of the penis (not brought out in Mr. CoUinge's 

 figure) was hardly visible, and the process being turned back, 



4 (after Gassies & Fischer) 



7 (after CoUinge) 



8 (after Collinge) 



Figures 4 to 8 — Various forms 

 of the penis which have been 

 given by different authorities, for 



Testacdhi haliotidea. 



6 (after Lacaze-Duthiers) 



and closely applied to the adjacent organs, might almost 

 have been overlooked. 



As Mr. Collinge remarks that the figures and descriptions 

 given by Mr. Taylor "leave much to be desired," and is severely 



