280 
HUGHES : INGLEBOROUGH, 
occur close together under the western slopes of Penygent, 
that is to say, on the nearest place where the top of the Mountain 
Limestone is exposed east of Ingleborough. There is often 
some confusion about the names of these two swallow holes ; 
Hull Pot is the northern, and Hunt Pot the southern chasm, 
the distance between them being about 600 yards. 
From the black limestones above Hull Pot I have procured 
the following species, but they were collected before I had cut 
off the Black Marble Series above from the Black Shaley Lime- 
stone Series below, and the list therefore includes the fossils 
of what I now consider two distinct horizons : — 
Producta gigantea (Sow.). 
P. costata. 
P. semireiiculata (Mart.). 
P. aculeata (Mart.). 
P. piinctata (Mart.). 
P. scahricula (Mart.). 
P. cora (d'Orb.). 
P. longispma (Sow.). 
P. longispina var. lobata. 
P. fimbriata (Sow.). 
Spirifera {Martinia) glabra (Mart.). 
Sp. striata (Mart.). 
Sp. lineata (Mart.). 
Sp, trigonalis (Mart.). 
Sp. grandicostata (McCoy). 
Sp. crassa (de Kon.). 
Sp. bisulcata. 
Sp. humerosa. 
Sp. margaritacea. 
Spiriferina octoplicata. 
Athyris Roysii. 
Streptorhynchus [Orthotetes] crenistria (Phill.). 
Orthis Michelini (I'Ev.). 
Camarophoria crumena (Mart.). 
Actinocrinus. 
Lonsdaleia floriformis. 
