M oilier . — The Embryology of some Anomalous Dicotyledons . 463 
Fig. 21, Three cross-sections, beginning below the primary sinus of the cotyledonary 
primordium. The stem apex is only a perceptible protuberance at the centre of the space enclosed 
by the cotyledonary primordium. x 125. 
Fig. 22, a-d. Successive sections of an embryo, beginning below cotyledonary primordium. 
d includes the end of the embryo, giving the view obtained by looking directly at the end. The 
second sinus and the tip of the stem indicated by the broken lines are just perceptible. It is seen 
that the primary sinus is deeper, and a well marked anomaly exists, x 125. 
Fig. 23. Outline of a longitudinal section of an embryo similar to the above. x 125. 
Fig. 24, a-h. Series of alternate sections of an embryo from a mature seed, beginning below the 
primary sinus. The common base of the two cotyledons is quite marked. The base of each 
cotyledon is crescentic in cross-section, but their diverging ends become flattened as shown in g and 
h. x 125. 
Fig. 25. View of an embryo constructed from the same series of sections shown in part in 
Fig. 24. The tip of the stem is a very small protuberance. This is the only indication of a plumule. 
Figs. 26-28. Stylophorum diphyllum. 
Fig. 26, a-c. Three transverse sections through base of cotyledons of an embryo from a nearly 
mature seed. The two cotyledonary sinuses are of equal depth, and the two primordia seem to have 
been separate from the beginning, if there is such a thing as quite separate primordia. In a , the 
plerome of the stem and cotyls are indicated by broken lines. The stem apex is quite central, 
x 125. 
Fig. 27, a-f. Series of an embryo similar to the foregoing. A slight anomaly is manifested here. 
The stem apex is central, although appearing ( d ) slightly adnate to the base of the cotyledons below 
the secondary sinus, x 125. 
Fig. 28. Outline of a longitudinal section of an embryo, x 1 25. 
Figs. 29-32. Delphinium tricorne. 
Fig. 29, a-b. Two consecutive transverse sections from the broad end of a pear-shaped embryo 
in which the kidney-shaped cotyledonary primordium has just appeared. The primordium comprises 
almost the whole end of the embryo, x 125. 
Fig. 30, a-e. Series from an older embryo. The anomaly is quite well marked, x 125. 
Fig. 31, a-g. Series (alternate sections) from an embryo of a ripe seed, beginning at the base 
of the cotyledons, a, and extending to secondary sinus, g. The anomaly is marked ; the common 
base of the cotyledons by intercalary growth has formed a cotyledonary tube, x 125. 
Fig. 32. View of embryo constructed from same embryo as Fig. 31. The broken line indicates 
depth of cotyledonary tube. 
Figs* 33-35. Aquilegia canadensis. 
Fig. 33, a-d. Four consecutive sections including base of cotyledons. The cotyledonary primor- 
dium seems to have been kidney-shaped. x 125. 
Fig. 34. From an embryo similar to the preceding ; anomaly less marked, x 125. 
Fig. 35, a-g. Sections of an embryo from mature seed. c } d and e } f are consecutive. The 
base of each cotyledon is somewhat cylindrical, x 125. 
