NOTES. 



Habits of the Agnatha.*— Under this heading, Mr. Cooke, in the 

 third volume of the " Cambridge Natural History, "f briefly describes the 

 way in which he would lead one to suppose that TcstticcHa catches and 

 swallows its prey. The account is professedly based upon a sixteen-line note 

 by Mr. Butterell,^ and is intended to be made clearer by a drawing of 



Tf.itaceHa sciilidiim. Sovverby. — i. Seen fro"i above. — 2. From the right side. — 3. Con- 

 tracted and with the radula protruded. — 3a. The radula from above, enlarged. — 4. As 3, but 

 the radula has an earth-worm in its grip. — 4a. Badula seen from the right side, enlarged. — 

 5. Enveloping the worm. — 6, 6a and 6b. "Teeth" from the radula, isolated and enlarged. 



TestaccUa haliotidca taken from a figure by Lacaze-Duthiers § The fact 

 related by Mr. Butterell, that a gentle touch on the head with a pencil caused 

 his specimen of Tcstacella maugei to protrude its radula, is not repeated by Mr. 



* A. H. Cooke— 7V(C Cambiiih/e Natural History, vol. iii., 1895, pp. 51-55. 

 t See above, p. 42. 



X J. D. Butterell — " Note on Testacella maugei, Ffer." Journ. of Conch,, vol. iii., p. 277. 

 § H. de Lacaze-Duthiers — " Histoire de la Testacelle," Arch. Zool. Exp(?r. (ser. 2), 

 vol. v., 1887, p. 459. 



