HIND : CARBONIFEROUS ROCKS OF ISLE OF MAN. 145 
The section exposed from Langness to Castletown Har- 
bour is more difficult to collect from. 
There is a basement conglomerate resting on Manx slates, 
which is apparently the same rock as that seen near Cass ny 
Hawin, and this is overlaid by well-bedded limestones, the 
lower of which are much obscured by an overgrowth of sea- 
weed, as they form the foreshore between high and low water 
marks. About 20 ft. from the base of the limestone occurs 
the caninoid Campophyllum with Productus hemisphericus, 
Chonetes papillionacea, Spirifer cf. hisulcatus. 
The limestones are not well exposed between Langness 
and Castletown Harbour, but at the latter place about 30 ft. 
of beds are seen which contain — 
Caninoid Campophyllum. 
Prolecanites compressus. 
Orthoceras (Actinoceras). 
Leptoena analoga. 
Giganteid Produdi. 
The fairly broad gap between the Langness beds and those 
of Castletown Harbour is evidently of no great vertical extent, 
for the fauna on each side is characterised by the same caninoid 
Campophyllum, which indicates that both series belong to one 
and the same life zone. 
If the list of fossils from the Castletown Limestones given 
in the memoir, pp. 257-262, be consulted, a long list of species 
is quoted on the authority of several observers from the Lower 
or Castletown Limestones. 
If the identifications contained in this list be any way 
nearly correct, the fauna, as a whole, has a markedly high facies 
Martinia {Spirifer) glabra, Spirifer ovalis and Productus 
giganteus would definitely denote Dihunophyllum zones. 
In the collection made by Miss Burleigh, now in the 
Natural History Museum, South Kensington, are several 
specimens of Spirifer ovalis, labelled Scarlet quarry. 
There are several exposures of the Lower or Castletown 
Limestones in a series of extensive quarries near Ballasalla, in 
