88 
Kirtley F. Mather 
Productus isachseni Holtedahl 
[cf. P. gallatinensis] 
Productus pustulatus Keyserling 
[Pustula pustulata (Keyserling)] 
Productus irginae Stuckenberg 
Productus cora d^Orbigny? 
Productus punctatus (Martin) 
[Pustula punctata (Martin)] 
Productus elegans McCoy 
[Pustula elegans (McCoy)] 
Productus cf. fasciatus Kutorga 
[Pustula cf. fasciatus (Kutorga)] 
Marginifera typica Waagen 
Platyceras parvum Swallow 
Phillipsia cf. eichwaldi Fischer 
Griffithides ? cf. carringtonensis Etheridge 
Petalodus sp. 
One other locality is known which gives a clue toward obtain- 
ing knowledge of marine faunas contemporary with the Morrow. 
The Pendleside Group, a series of shales and limestones with 
occasional sandstones and mudstones, occupies a basin extending 
across central England, terminating toward the east near Chokier 
in Belgium and toward the west in County Clare, West Ireland. 
Its stratigraphical relations are singularly parallel to those of 
the Morrow as it rests apparently unconformably upon the Yore- 
dale series and beneath the Millstone Grits. Its fauna has been 
listed by Hind and Howe^® and contains the following inverte- 
brates, compared with certain of the Morrow forms. 
Pendleside Fauna Morrow Fauna 
Athyris ambigua 
cf. 
Composita 7 sp. 
Chonetes Laguessiana 
cf. 
Chonetes 3 sp. 
Discina nitida 
Lingula scotica 
cf. 
Orbiculoidea 2 sp. 
Orthis michelini 
cf. 
Rhipidomella 2 sp. 
Orthis resupinata 
cf. 
Schizophoria resupinoides 
Productus cora 
ibid. 
Productus longispinus 
cf. 
Pustula sublineata 
Productus punctatus 
=: 
Pustula punctata 
Productus scabriculus 
cf. 
Pustula nebraskensis 
Productus semireticulatus 
cf. 
Productus morrowensis 
Rhynchonella trilatera 
Spirifer glabra 
cf. 
Pugnoides triangularis 
Streptorhynchus crenistria 
Pteronites persulcata 
cf. 
Orthotetes robusta 
