336 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
able planes of section the woody portion of the central cylinder was 
still present in a marked degree and showed a number of foliar gaps 
much larger than seven. It may consequently be safely assumed that 
if our specimens had been complete, it would have been quite apparent 
that there were numerous fascicular leaves and that these were arranged 
in a spiral and not verticillate fashion. It follows that the short- 
shoots under consideration cannot be referred to the genus Pinus, 
but must in the present state of our knowledge at any rate, be attributed 
to the genus Prepinus. The following are the characters which 
appear to justify this reference: fascicular sheath composed of num- 
erous spirally ranked non-deciduous and non-scarious bracts; leaves 
niunerous, spirally arranged, with resin canals running to the very 
bases and communicating with those of the axis. The anatomical 
structure of the fascicular leaves could not be made out in detail, so 
the comparison with Prepinus along this line is excluded. It is difhcult 
to make clear specific distinction between Prepinus siaienensis and 
the new species at present under consideration, except on the basis 
of the anatomical structure of the axis of the short-shoot. As has been 
pointed out above, in the INIartha's Vineyard species there are several 
rows of vertical resin canals in the wood of the short-shoot in contrast 
to the single series fovmd in Prepinus statenensis. Moreover, there 
are no apparent sclerotic nests in the medulla of the former species in 
contrast to the well marked aggregations of sclerenchyma found in 
the pith of the latter. In accordance with the data furnished in the 
foregoing paragraphs, it is now possible to state precisely the characters 
of the new species under consideration: 
Prepinus viticetensis species nov. 
Short-shoots of large size, sheathed by spirally arranged, numerous, 
non-deciduous bracts; fascicular leaves nvmierous, with s])iral phyllo- 
taxis, having resin canals decurrent to the base and continuous with 
similar canals of the axis; ivood of the shorf-shonts with numerous 
resin canals in two or more rotes; pith icithout sclerotic nests. 
The italicised portion of the specific description indicates the features 
of contrast with Prepinus statenensis. 
