Lm] 
I912. No. 9. ON SOME ORDOVICIAN FOSSILS FROM BOOTHIA FELIX ETC. 
One detached specimen, (pl. IV, fig. 4—5) although somewhat fragmentary, 
shows the upper side of the whorls, so that we form some idea of their 
height. In the latter we can also discern a portion of the umbilicus, and it is 
possible to make out its somewhat conical, broad form. Disintegration 
may however have worn away possible irregularites. No exact determina- 
tion can be arrived at from this material. With its comparatively great 
height, the form strongly reminds one of Maclurea logani SALTER, although 
the whorls scarcely expand so greatly as in the latter. The form 
has also a resemblance to the species M. (Maclurina) manitobensis WHITE- 
AVES, with its somewhat broad, conical umbilicus. The said forms, as well 
as several others adjacent, are typical Ordovician extending from Stones 
River group to the Trenton. 
M. arctica HaucHton, which was found by Mc Clintock on the west 
coast of King Williams Land, and at Depot Bay, is distinguished by the 
more angular section of the whorls. 
Eurystomites sp. 
PL H, Fig. x. 
One specimen of a discoidal cephalopod must undoubtedly be referred 
to this genus, although the state of preservation is not sufficiently good to 
allow of any determination of the species. 
The siphuncle cannot be discovered, and the septa are not entirely 
preserved, although the sutures are plainly visible and exhibit a flat lateral 
lobus. The typical oblique ribs (crests) are found in partial preservation. 
This form does not offer any closer stratigraphic hold, as the genus 
Eurystomites occurs. in several divisions of Ordovicium, especially in the 
lower divisions from Beekmantownian to Black River. 
Of straight cephalopoda a large number has been found, but unfor- 
tunately they were scarcely ever so well preserved that one could 
discover their outward shape, and at the same time make clear the inward 
character by means of grinding. A number of orthoceran shells occur, of 
various types, some smooth, some with outer annulations, where the 
internal structure is not known, and it is not possible to undertake any 
systematic classification. The outer shape is also commonly greatly affected 
by weathering, so that the finer details as to stripes etc. are never 
preserved. 
Some few examples of weathered interiors fortunately exhibit the form of 
the septa and the siphuncle, whilst now and then we can also discern or 
