No. 447-] BREEDING HABITS OJ- CKJ ]-FlS// . 



The process of cleaning was observed in a nuinbL-r ot eases 



so alert 'that it is difficult to catch her in the act of ck'aniii- 

 yet the attitude assumed is most noticeable when seen. .\> 

 indicated in Fig. 3 the body is raised higii up trom the usual 

 crouching, crawling position and slauds like a tripod supported 

 above the bottom of the aquarium upon the two outspread large 

 claws in front and the oddly down-bcut abdomen belund. Hie 

 other legs aid but little in support of the body and are eoneerned 

 with the cleaning of the abdomen. The fifth legs, and at limes 

 the second and third also, were seen to be thrust back under 

 the abdomen and there carefully and patiently used to remove 



all the dirt from the entire under surface includm^ the pleoiKxlN. 

 Even the numerous long, plumose hairs on the jjleopods lose then- 

 covering of dark "dirt," and the transformation wrought in the 

 appearance of the whole under side of the abduiiicu is ^icit 

 that (me would suppose the crayfish had cast its shell un<l uou- 

 an entirely new <me. ill 

 The ends of the fifth legs are shoved against the pleopo( s 

 and other parts of the abdomen with considerable force but it is 

 only slowly that they accomplish perceptible cleaning. On 

 examining the tips of these legs we find^ th. " ^ 

 well fit for such cleaning v 



terminal segment is like a strong c 



g. 4 the 

 as it has a series of si)mes 



