. Annual report. New York State Museum; Science; Science. 430 NEW YORK STATE MUSEUM. 39-1 distal part of theca (horizontal to slightly introverted) ; the apertural exca- vation wide and deep in specimens preserved in relief, occupying one fourth to one third the length of the theca and one third to two fifths the width of the rhabdosome ; in compressed specimens narrower and deeper. The nemacaulus relatively thick (.2 mm). Position and localities. In Great Britain this species is widely distributed (Scotland, the Lake District, Shropshire, Wales and Ireland) and has a very long range, for it i
. Annual report. New York State Museum; Science; Science. 430 NEW YORK STATE MUSEUM. 39-1 distal part of theca (horizontal to slightly introverted) ; the apertural exca- vation wide and deep in specimens preserved in relief, occupying one fourth to one third the length of the theca and one third to two fifths the width of the rhabdosome ; in compressed specimens narrower and deeper. The nemacaulus relatively thick (.2 mm). Position and localities. In Great Britain this species is widely distributed (Scotland, the Lake District, Shropshire, Wales and Ireland) and has a very long range, for it is already reported from the Ellergill beds in the Upper Skiddaw Slates (Elles) Avhich are thought to correspond to the Llanvirn of Wales (Upper Arenig) in age and is there associated with forms occurring in our third Deepkill zone and below. Freeh even claims [1897, ] that Roemer has collected it near Christiania in Phyl- lograptus shale with P h y 11 o g r a p t u s t y p u s and P . a n g u s t i f o 1 i u s. From the Llanvirn It ranges through the Llandeilo into the lower Caradoc [Lapworth, 1880, 1889] where it is one of the common forms of the C. wilsoni zone of the lower Hartfell shales and it is also well known in Scandinavia, where in Scania it is 396^ reported from the zone of Diplograptus putillus Fig. 394-99 CI imacograptus schar- |}y Tullbero". enbergi Lapworth. Fig. , 395 Copies * "^ of Lapworth's original ms drawings of British T A - *. 1 \ C 1 11 specimens (x o and x 6%). Fig. 396 Weii In America it has been first observed by preserved specimen from Glenmont (not pre- ^dienfrJ;^^^!r;nM?ao^fra^ Lapworth in collections from various outcrops tig. 398, 399 Iwo sides of fragment from _, .... . /-> . Mt Moreno, preserved in demireiief. x5 of the 1 renton shales in the province oi Ouebec (Griffin Cove and Island of Orleans, etc.) and Gurley has also listed it from the "Upper Dicellograptus zone" at Magog, Canada. The present writer found i
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