66 



Report of the State Geologist. 



Pit ipidoinella Van uxem i. 



Atrypa reticularis, large and finely plicated. 



Spirifer (zsper, widely extended form, much more.alate than that of the 

 Hamilton group (cc). 



Actinoptefia Poydi, the typical form of the Hamilton group with fascic- 

 ulate radii and spinose concentric striae (c). 



Mytilarca with attached Crania. 



Gram mysia eon stru la. 



Pal wo neilo em arg in a ta. 



Conula/ria undulata. 



Tmtaculites spiculus, small form. 



M'U/rch isonia mieula. 



Poteriocrinus gregarius. 



In the hundred feet immediately overlying this fauna the association 

 of species is not maintained lmt only the forms more generally distributed 

 in the rocks beneath were found, viz. : 



Spirifer muc?'onatus, var. posterns. 



CJtonetes scitula, Idorhynchus mesacostalis, Nuculites cf. Nyssa and 

 Pahp-oneil.o feeunda. P7iacops rana also occurs in the lower part of this 

 section, but sparingly, and at the top Paraeyclas I i rata. 



A short distance higher Paraeyclas occurs abundantly in soft sandy 

 shales, the following species being taken at the horizon : 



Paraeyclas lirata (cc). 



Leptodesma Pogersi (cc). 



Palceoneilo feeunda. 



Mod iomo/pli a s u oalata, 



Tropidoleptus carmutus (c). 



Chonctcs .scitula, large form (c). 



Oh. lepida. 



1 'roduetella spinulicosta. 

 Tornoceras uniangnlan . 



In the immediately overlying seventy feet, fossils occur in thin layers at 

 considerable intervals. Various of these layers were examined, but the asso- 

 ciations of species were found not to present great variations. 



'Idie rocks contain : 



Spirifer mttcronafot>s, the normal short-winged form (cc). 



Spirifer; the most abundant species of this genus is a small shell with a 

 sharp median septum, but with the external aspect of S. mitcronakis, var. 

 po.steni.s. It is probably variety of S. mesacostalis. 



