there •would hardly be oecasim :•: sreak my Iccger ;:' a rrr p hi r rrgan. In 

 vesicular chara::er :: :hr litter "Is iisac- earing mi the tr;chio ro.— — _» 



MoreoTer in this figure the trophic v~i:le - n.re restri 

 is onlv a small procephaiio proloiLjaticc. :: it which i;es 

 ■-•f the embryo. PoariHy this embryo would ne-cr ~a~e 

 dexure. There -eer_s :■: ce some ■lilwtr in she im : mm 

 for an embryo to undergo. ^~ :rr.~ liter tms i'.-^re tne :r 

 absorbed into the composition ot* the Tntr: 



Stages XI and XII. These stages differ fr:- i 

 pigment which has been deposited in the integnaeBt » 

 them together. The full compiemen: ::' legs :s present 

 determine mthllfbly male and female emery :s. They do 

 their length, which represents approximately the length 

 about 15 mm. — but the male embryo has it? pairs ::' 

 female has rl-fe pairs. I hare exam in ed sections through • 

 condrming the determination of sex and found the oom. 

 of an ovary, shown in Fig. IS. is from a female emery: 

 male the sexual organs are also well djfeien:--iml and ti 

 more pronounced relatively than in x mature male. 



In the two oldest embryos which I .'brained ibel-ongi 

 antennae and entire dorsal surface were darkly pigmual 

 on the whole unpigmented. The head and neck were 

 2nd leg lying in the bend. The antennae in one were s 

 and in the other were bent back under the head. Thes 

 female and were lying in the terminal [waUwi of the ui 

 never found a darkly pigmented embryo in any other p 

 bat I have found an unpigmented embryo in this positioj 



From the same female from which these embryos w* 

 them belonged, in .accordance with the suocessiouai mo* 

 this species, to Stage XL The antennae were pigmee 

 dorsal surface was only very faintly pigmented, the gen* 

 with faint greenish tinge. 



Although in all extensive collectiws of Peripatos 

 as in my own. the males are much less numerous than : 

 the two oldest embryos in each of the two females which 

 them males, and three of the embryos immediately follow: 

 females. The fourth was probably a female but I cool, 

 appendages. This order may be a mere coincidence b 

 periodicity in the production of males and females and an; 

 should pay attention to this matter. 



