Xo. 484] ATTACHED YOrX(; OF CRAYFISH 



Each new seta luitl its lateral l.arh. cIom.i' a|.|)iv.M., 

 axis. Moreover the new cnticlc .•Men.lc.l" inwani to 



tul.e. eii.lin-al.rnptly, Mn.n-lv nvall'.l thr likr iiil.r 

 alonu- the seta' of the eardi worm, rrol.al.l.v ai n 

 sleeves heeoine everted and m. all-.u ihr .ndd'm rMr 

 setae to a length e(jiial to the length of tho^c tuho ;■ 

 length of setpe already lyinu' between the old aii<l new < 



Molted into a second stau'*- tlie yoimu' i1 loiji'ins \ 

 long, H wide and 2 dec|) and had anteiuia' ."> nun. I(»ii<: 



next molt — some hve days. May 2(lth to th 



upon the mother's pleopods, hut were not so hrinly fix 

 as thev fell off when put into Worcester's liquid. 



While in most respects the larva was essentially like 

 larva of C. clarkii a number of differences were noted. 



The rostrum was le.ss l)ent down than in C. darkii a 

 and pointed and visible from the side as its tip exteii<l<'( 

 the eyes; its sides moreover were not straight as in (' 

 arched so that something of the adult character 

 expressed. 



The first anti una \va~- xcx concave on the upper sid- 



externaTly by u few small spines an. I one very iin|)erf 

 seta. Beneath these spines the piuinoM' MMa' .)t' the 

 were seen in formation. The exojHi.lite hoi'e 

 three on the sixth and two on th<' fifth an.l on the foii 

 The exopodite. an.l en.lop<..lit(- uere ea.'h .lixi.ie.l 



