MANNER OF FEEDING IN TESTACELLA SCUTULUM. 289 



T. maugei more closely in certain points*. Mr. Ashford states 

 that he did not publish his results, which were communicated 

 to Mr. Taylor by letter, and that the differences which he pointed 

 out in 1885 he has since found to be constant. Mr. Taylor 

 points out the external differences between the two forms, 

 including the characters of the shells, and goes on to the internal 

 anatomy, finding the greatest difference, as malocologists seem 

 to do, in the reproductive organs, T. scutulum, like T. maugei, 

 lacking the characteristic flagellum of T. haliotoidea. There is 

 one weak point, however, in what is otherwise a convincing paper, 

 and that is, that the organs of the first species are drawn from an 

 example which is stated to be sexually immature. The present 

 writer has been familiar with many of the external differences for 

 some years, and has dissected a number of mature specimens of 

 T. scutulum in which no more flagellum was to be made out than 

 appears in Mr. Taylor's figure. There is also considerable diffe- 

 rence in the shape of the radula and the teeth. 



Thanks are due to Mr. Taylor for a copy of his paper, to 

 Mr. Charles Ashford for his information, and to Mr. B. B. 

 Woodward and Mr. Edgar Smith for assistance in looking up 

 references in books under their charge at the Natural History 

 Museum. 



EXPLANATION OF PLATE. 

 Testacella scutulum, Soxverby — Buckhurst Hill, Essex. 



Fig. 1. The animal extended, seen from above. 



2. The same, but seen from right side. 



3. The animal contracted, with radula protruded. 

 3 a. View oi radula from above, enlarged. 



4. The same as fig. 3, but the radula with an earthworm in its 



grip- 

 da. Enlarged side view of radula, as seen in fig. 4. 



5. The animal enveloping the earthworm by gradual extension. 



6. Tooth from side of radula. 



6a. The same, from a point nearer the centre of the radula. 

 66. The same, from very near the centre of the radula. 



