262 
seeds, there were 47 with two, 65 with three and 5 with 
four ribs. 
At the end of their note they compare the seeds of 
Ginkgo with those of Trigonocarpus Shorensis, and say: 
Since in Ginkgo, however, no valves occur — the stony 
coat lacking fissures at the place of the ribs — and as 
vascular bundles are absent from the sarcotesta, those 
seeds cannot, as it seems to us, be compared with the 
seeds here !) described” (p. 594). 
On account of the above mentioned cases, in which 
there are sutures to be seen, though they may be limited 
to a small region and only to be observed in a defined 
stage, Ï can not quite agree with their conclusion, and a 
comparison with Trigonocarpus may certainly be made, 
but to this Ï will return in the last chapter. 
Caruthers (31) has observed cases where three ribs 
were present on the sclerotesta and in connection with 
them three lips at the micropyle, and three vascular bundles 
in the endotesta: ,,]n some cases there is a three-lipped 
integument and a three-angled nucellus, there being also 
three bundles, one ending in each angled side” (p. 126). 
Às Ï have examined the correspondence of the slips at the 
micropyle and the ribs on the seed coat, with the result 
Ï already mentioned, Î question the significance of those 
slips, but it is quite possible that in other materials they 
are better developed, as is the case in Macrozamia 
formerly described. If they are present, they may strengthen 
the view, obtained in connection with the ribs and sutures, 
of the multiple origin of the integument. 
1j Salisburg: ,On the structure and relationship of Trigonocarpus 
shorensis”. (126). 
