MATING HABITS OF THE BRACHYUK\. 24! 



Holmes (17) found that in Amphipods the ovipo-ition occurs 

 after the moulting of the female. The males capture the females 

 before the moult and leave them for a few hours, resuming 

 possession of them after the moult. He found that tin- method of 

 recognition i- neither by sight nor smell. He removed antemve 

 and blackened the eyes, and -till the males gra-ped the females. 

 Holme- conclude- that the male ha- the instinct to seize and 

 carry another individual of tin- -ame -pecies, while the female has 

 ill-- in-tinct i<. lie <|uiet \\hen -< i/ed. He found that dead indi- 

 vidual- \\ere not carried and explained this by the lack of an 

 isional mo\.-ineni causing a -iniu:Je on the part of the male 

 lo reiain hi- hold. Holme- ha- mentioned a!-o the v, ork of 

 I du on Arti-min. in which the latter found that the male- 

 ot Artemia cla-p the female- bv mean- of peculiarly -haped 

 antennae, and the two s > im about to- ether for several days. 



I'ohni ||.,|m.-,. 17 noted that the male- of coprpod- while 

 mating, -uim about on the back- of the female- much as in the 

 . \mpliipoda. 



Dearborn 9), Andrews 2, 3), Chidester 6, 7) and Pearse (26), 



\\orkin- uith cra\ li-h, ha\e -ho\\ n ih.it munition i- largely 

 tacltial. . \ndir\\- di.-i nnulu- \ eiit rali- in < 'tis, 



the Amei ii an ira\li-h foiim' of the Kockic-. Thi- -i ; 



to retain the spermatophores until the female lav- her eggs. In 

 the rra\li-h, I'ertili/alion of the ci^- i- .\trrnal. Chide-ter 



lonnd o that males grasp other males and attempt t<> copulate 



\\itli them. I'ear-e found that male- attempt to copulate with 

 dead female- of the -ami- and different Species 26 , Audi' 



holds that the male recognizes the temali a- a female because 



-he dr- noi resist, hencr tlu- dead or bound male i- taken for a 



female. llr-a\- ; I - ttius possible that from the crayfish 



-tand|>oint the miK difleivncr bi-tui-ni the sCXCS i- a diften-nce 

 in beha\ ior ,md not a difference in form, and moreover a d ff ere nee 

 i\e-l b\ mn-( lr and touch sense and not in effect upon any 

 other -i-ii M-." 



It -rrm- to the \\riirr. that although in the cra\ ti-li and the 

 lob-ter, he male- do not capture the female- and watch o\ er 

 them while the\ - moult, the process i- analo-.m-. for the freshly 

 moulted female i- -non captured and Icrtili/ed. In the ca-e of 



