STUDIES OF REPRODUCTIVE ELEMENTS: IF. 333 



Fig. 36. Stage like the last drawn at the level of avchoplasmic spmdle. 

 Central- and eadial-fibres beantifnlly seen ; owing to accumulation of dirty matters 

 over archoplasms, centrosomos not to be recognised. Killed with Fleminiiig's stronger 

 till id and stained with Bohmer's hirmatoxylin. 



Fig. 37. Section of nucleus in division at about same stage as that repre- 

 sented by fig. 35 or 30 ; radial-fibres in the homogeneous mass of nucleoplasm at 

 lower pole of nucleus, different apearance from central-fibres. Killed with Flem- 

 miug's stronger fluid and stained with Bohmer's hnematoxylin. 



Plate XIY. 



(Figs. 38-43, (liri.siuii; Figs. 44-52, sjmre-formatiim.) 



Fig. 38. One of the mielei of a dividing individual just after division ; 

 chromosomes still radiating from pole where archoplasm lies ; small centrosome 

 lying close to nucleus. Killed with Flemming's stronger fluid and stained with 

 Bohmer's htçmatoxylin. 



Fig. 39. Stage same as fig. 38. Centrosome surrounded by clear space at 

 centre of upper archoplasm ; in lower archoplasm hidden below nucleus and there- 

 fore not well seen ; part of central-spindle in shape of a diagonal figure (.c) between 

 the separating nuclei. Killed with Boveri's picro-acetic acid solution and stained 

 with Bohmer's hfematoxylin. 



Fig. 40. Another nucleus in anaphasis ; microsomes plainly visible. Killed 

 with Flemming's stronger fluid and stained with Bohmer's hferaatoxylin. 



Fig. 41. Nucleus at stage slightly later than that of fig. 40. Microsomes no 

 longer in rows, but more or less irregular and thus assuming the position in the 

 resting nuclei. Killed with Flemming's stronger fluid, and stained with acid-fuchsin 

 and methylen-blue. 



Fig. 42. Similar imcleus treated with Boveri's picro-acetic acid and stained 

 with acid-fuchsin and methylen-blne ; microsomes very much swollen by action of 

 acetic acid. 



Fig. 43. Nuclei of a dividing individual at about the stage fig. 7 or 8. 

 Killed with Flemming's stronger fluid and stained with acid-fnchsin and methylen- 

 blue. 



