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No. 10.— A NEW PREPINUS FROM MARTHA'S VINEYARD. 
BY EDWARD C. JEFFREY. 
Not long since the present writer described remains of short-shoots 
of a pine-like Conifer, from the Androvette deposits of Staten Island 
(Island Cretaceous or Upper Potomac), showing internal structure 
well preserved. These differed from the brachyblasts of living pines 
in several important particulars, viz.: by the possession of a very 
extensive fascicular sheath, resembling that of existing Soft Pines, 
but more richly developed and not deciduous; by the presence of 
numerous fascicular leaves not in definite number as in living pines 
and attached behind a still active growing point; by the complicated 
transfusion tissue of the fascicular leaves, resembling in its organiza- 
tion most nearly that found in the leaf of Cordaites; and finally, of 
greatest importance, by the presence of true centripetal wood in the 
foliar bundles. To this remarkable and interesting genus the name 
Prepinus was assigned ("On the Structure of the Leaf in Cretaceous 
Pines," Ann. Bot., vol. 22, p. 207-220, pis. 13, 14, 1908). 
In the autumn of 1908, two short-shoots of a similar character were 
found in the Cretaceous clays of Gay Plead, Martha's Vineyard, 
Massachusetts, to the south of the lighthouse. Photographs of these 
two spur-shoots are shown from opposite sides in Figs. 3, 4, 5, and (5 
(PI. 33), under a three-fold magnification. Practically only the brac- 
tigerous region of the short -shoot is present; the terminal portion, 
bearing the fascicular leaves, has practically disappeared and is 
j)resent only in some degree in the smaller specimen showTi in Figs. 
3 and 4 (PI. 33). The sheathing bracts are of the same type and are 
marked by the same persistence found in Prepinus statenensis Jeffrey. 
For comparison, a well preserved short -shoot of this species is presented 
in Figs. 1 and 2 (PI. 33) under a five-fold magnification. In the Staten 
Island specimen part of the bractigerous region has been broken off 
at the time of fossilization, while the fascicular leaves are present and 
are represented by a considerable portion of their bases. In Fio-. 1 
(PI. 13) of the article cited above, is shown, under a magnification of 
ten diameters, a spur-shoot of Prepinus statenemis in the same condi- 
tion of dilapidation as those of the species at present under considera- 
