flind: Life Zones in British Carboniferous Rocks. 21 
stratified hardened shale, crammed full of G. spfzra/e. In the 
same bed are a few specimens of G. déadema and Orthoceras 
steinhauert. Above are 14-15 feet of Shales with calcareous 
nodules, which contain the following fauna ; succeeded by 5 feet 
of a shell bed composed of closely-packed valves of Schzzophoria 
resupinata, Which shows a curious character in its radiating ribs, 
which probably may be relied upon to distinguish the form at 
this horizon, viz., the lines every now and then thicken and come 
to an abrupt end, as if there had been an attempt to commence 
to form spines and this had failed. I have seen the same 
character in specimens from an Orthis bed in the Millstone 
Grit elsewhere. 
Corals. Posidoniella semisulcata. 
Amplexizaphentis (rare). Pleronites angustatus. 
Palaeosolen parallela. 
Brachiopoda. Protoschtzodus orbicularis. 
Seminula ambigua. wer: A 
: & Sanguinolites, v. scriptus. 
Scaldia benedentana. 
Sedgwickia ovata. 
Schizodus axiniformis. 
Chonetes cf. laguessiana. 
Dialasma hastata. 
Lingula mytiloides. 
<5 scotica. 
Productus aft. cova. Gasteropoda. 
an longispinus. Loxonema sp. 
5 scabriculus. Macrocheilina sp. 
oF semtreticulatus. Raphistoma junior and others not 
Schizophoria resupinata. identified. 
3 (Rhipidomella) michelinz. Euphemus uret. 
Spiriyer glaber. 3 sp. 
».  trigonalis. Pteropoda. 
»,  Ozsulcatus. 
Derbya sp. 
| 
| Conularia quadrisulcata. 
Cephalopoda. 
Lamellibranchiata. Temnochetlus coronatus. 
Aviculopecten gentilis. Ephippioceras bilobatum. 
Actinopteria persulcata. Stroboceras sulcatum. 
Ctenodonta laevirostris. Coelonautilus, cf. cariniferus. 
Allorisma sulcata. Glyphioceras diadema. 
Edmondia sulcata. ‘. spirale 
53 rudis. Orthoceras steinhauert. 
#3 MACCOY 1. 33 teres. 
Leiopteria squamosa. Crustacea. 
Modiola transversa. 
Myalina peralata. 
Mytilomorpha rhombea. 
Nucula gibbosa. 
», aegualis. 
Ceratiocaris oretonensts. 
Dithyrocaris testudinea, 
Bry0zoa. 
Millepora interporosa. 
Nuculana attenuata. Plante. 
Parallelodon obtusus. Smooth stems. 
$3 bistriata. Stigmaria 
Posidoniella levis. Trigonocarpon. 
1907 January I. 
