164 THE MICROSCOPICAL NEWS. 
of hooks; 9, crescentic ossicle; #4 2, hooklets of caudal disc; 4, 
tendinous appendages of hooklets; fs, pharyngeal sac ; ¢s, cell- 
like segments; @s, cesophagus; ze, bifurcate intestine; ce, 
ceecal ends of branches of intestine; w g, unicellular glands; fd, 
filamentous ducts of unicellular glands; wvs, contractile sacs ; 
ov, Ovary; 0Um, ovum; oud, oviduct; ws, uterus; ug, 
granular lining of uterus; ff, perforated papilla of uterus; /s, 
testis. 
fig. 44. m, mouth, showing ovary margin and surrounding radial 
Striation. 
fig. 45. Antero-lateral view of pharyngeal sac. 72, five of the 
eight tentacular processes ; ¢s, cell-like segment ; m x, mastax. 
fig. 40. Head of G. elegans, showing the eight pharyngeal ten- 
tacles protruded through the open mouth. The ventral surface of 
the head appeared to be closely adherent to the surface of the 
stickleback’s fin, and particles of food were seen passing through 
the pharyngeal sac when this drawing was made. 
fig. 47. Head of G. elegans, showing the smaller groups of glan- 
dular cells. 
Fig. 48. A mature ovum, gv, germinal vesicle; gs, germinal 
spot. 
fig. 49. Uterus wz, containing an ovum in an early stage of 
segmentation. 
/ig. 50. Uterus containing an ovum in an advanced stage of 
segmentation. 
fig. 51. Uterus, ww, containing an embryo, we, showing / z, 
hooks of caudal disc ; ww s, contractile sac. 
fig. 52. Uterus wu, containing an embryo showing 4 2, pro- 
cesses and hooklets of caudal disc. Other letters as in Fig. 51. 
fig. 53. Uterus containing an embryo, the uterus (w/s,) of 
which contains a secondary embryo, se. A mature ovum, 0vm 2, 
is seen in the oviduct, ovdof the primary embryo. A mature 
ovum, 0vm Z, is also to be seen in the oviduct of the parent. 
The oviduct of the parent is in nature partially beneath the uterus ; 
its position in the drawing is for the sake of clearness. 
THE HATCHING OF ROTIFERS IN VOLVOX 
GLOBATOR. 
By James FLEMING, F.R.M.LS. 
A hes white specks frequently seen in the interior of Volvox 
i globator are the eggs of the parasite Rotifer, Votommata para- 
sitica. After removal from its native water, Volvox, as a rule, 
