During the night Eledones will sometimes escape by 

 climbing over the walls, if in an uncovered tank. 



The shape of the visceral dome varies considerably. 

 When resting, the body is shortish, and forms a bluntly 

 rounded stout sac, and the arms may be coiled up or 

 stretched out, and are often waved gently about; while at 

 other times they are passed over the surface of the body, 

 seeming to brush it, or are passed down into the mantle 

 cavity and then out again. When swimming, however, 

 the shape of the body alters. It becomes stretched out 

 antero-posteriorly, and so assumes a form very like that 

 of Sepia, while a lateral fold of skin becomes prominent, 

 which marks off the dorsal from the ventral surface, and 

 forms a delicate fin, very similar again to that found in 

 Sepia. Wave-like undulations, beginning at the front 

 and passing backward, pass along this temporary 

 balancing organ, which helps to svipport the body. With 

 the return to rest or creeping the fin is lost again, 

 becoming indistinguishable from the general body 

 surface. Also when swimming, a longitudinal median 

 depression on the ventral surface of the mantle indicates 

 the line of insertion of the vertical septum, on its inner 

 surface. 



Eledone is often found in the morning adhering 

 halfway up the glass front of the tank, nearest the light. 

 At other times it hides in dark corners, and if stones are 

 provided, will heap these into a rough mound in a 

 corner of the tank and hide behind this. It was, no 

 doubt, this desire for dim seclusion that often led one to 

 rest with the cephalopedal mass inside a jam jar, which 

 was in one corner of the tank. Eledone, apparently, 

 dislikes a strong light, in which it seems quite incapable 

 of opening its eyes. If a light is brought near during 

 the night, the eve contracts and the animal retreats. 



