No. 3-] EGG OF ALLOLOBOPHORA FCETIDA. 535 



in Noctiluca apparently corresponds to Boveri's archoplasm. It 

 is a persistent cytoplasmic structure, of a definite size and 

 shape in resting and active cells, and appears to consist of 

 a specific substance. Astral rays and central spindle are 

 formed from its substance, p. 727. These observations sup- 

 port Ishikavva's (17) ('94) earlier interpretation of an archo- 

 plasmic spindle." Later he says, " Here both the central spin- 

 dle fibers and the radial fibers are formed out of archoplasm " 

 (18), 099). 



Photo 94, PI. XLV. Reproduction of v. Lenhossek's (19) 

 Fig. I. " Nervenzelle mittlerer Grosse (41; ft) aus dem 

 spinalganglion des Frosches," showing the " Plasmaschollen " 

 (Nissl's granules). The author regards these as aggregations 

 of the cytoplasm, "bloss um koncentrisch verlaufende Ver- 

 dichtungen in der wabenartigen Struktur des Protoplasmas 

 handelt," p. 351. A comparison of this figure with photos of 

 scattered archoplasm in Pis. XLI and XLIII recalls Prenant's 

 (29) conclusions as to the homology of these structures to 

 kinoplasm (archoplasm). '' S'il y a ou non dans la cellule 

 nerveuse une substance qui satisfait aux conditions requises 

 d'un kinoplasme. Pour le dire tout de suite, la substance 

 chromatophile de Nissl nous parait remplir ces conditions," 

 p. 179. Prenant supports Marinesca's interpretation of this 

 substance and accepts his term " Kinetoplasma," p. 188. 



Photo 89, PI. XLV. Reproduction. Henneguy (14), Fig. 288. 

 " Spermatocyte de Pyrrhocoris aptems . . . montrant des fila- 

 ments de kinoplasma plus fortement colores . . . que le reste 

 de la cellule." Henneguy identifies this substance as the 

 Nebenkern of spermatocytes. " Ces elements forment le 

 Nebenkern dans les spermatocytes des generations ulterieures. 

 . . . Ces elements figures representent le kinoplasma de 

 Strasburger dont on peut ici suivre revolution, et qui res- 

 tent differencies du trophoplasma depuis les premiers sperma- 

 tocytes jusqu'a la fin du developpement du spermatozoide," 

 p. 380 {cf. photos of scattered archoplasm of PI. XLI and 

 Photo 55, PI. XLIII). 



Photos 91, 92, PI. XLV. Reproductions of Morgan's (23) 

 Figs. 18 and 41 — unfertilized eggs (Arbacia, Sipunculus), 



