92 DESCRIPTION. 



daisy, tlie appearance is also very attractive. The 

 tentacles are all of the same size, about one fourth of 

 the diameter of the fully expanded disk in length : 

 they are arranged in four or five rows, not with per- 

 fect regularity ; the innermost series when distended 

 are apt to stand upright, while the others lie down, 

 or hang over the edge. Although a considerable 

 space exists between the inmost series and the mouth, 

 each tentacle may be traced by an arched ridge run- 

 ning from its base to the mouth ; the mouth is formed 

 of four rounded lobes so as to make a cross, and the 

 edge of each lobe is notched with many distinct and 

 very regular white crenations, the terminations of th& 

 tentacular ridges. The disk thus formed is pale olive, 

 somewhat silvered ; deeper brown around the bases of 

 the tentacles, where this colour forms sinuous encir- 

 cling lines. The ridges are marked throughout with 

 close-set transverse wrinkles of extreme delicacy. 



The animal, like A. crassicornis, protrudes the 

 peristoma in large corrugated pellucid lobes. It also 

 distends the tentacles to a translucent condition ; in 

 which state they are seen to be annulated with a 

 broad blackish band at their base, and with two re- 

 mote pale narrow ones, at one and two thirds of their 

 length. This appearance of the tentacles again re- 

 minds us of crassicornis. 



May VZth. In one that has been in my possession 

 about three weeks, I see several of the tentacles con- 

 tain the wbite seminal filaments coiled up throughout 

 their length, beautifully distinct through their pellu- 

 cid substance. 



The tentacles on being cut ofi* and flattened by the 



