18 
MUSEUM BULLETIN NO. 3. 
13 Chasmatopora granistriata 
14 Dicranopora emacerata 
15 D. fragilis 
16 Eridotrypa simulatrix 
17 Helopora imbricata 
18 Lioclemella nitida 
19 Mitoclema n. sp. 
20 Pachydictya Anna 
21 Phacelopora pertenuis 
22 Protocrisina exigua 
23 Ptilodictya flagellum 
24 P. magnifica 
25 Semocoscinium pretiosa 
26 Stomotopora arachnoidea 
27 Catazyga anticostiensls 
28 Clitambonites verneuili di ver- 
sus 
29 Dalmanella testudinaria 
meeki 
30 Dinorthis subquadrata n. 
sp. 
31 Leptaena rhomboidalis 
(appears in 
lower Ellis 
bay) 
32 L. ? nitens 
33 Platystrophia dentata-acutili- 
rata 
34 Plectambonites sericeus 
35 Rhynchotrema anticostiensis 
36 R. perlamellosa 
37 Schizocrania iiiosa 
38 Strophomena fluctuosa 
39 Byssonychia cf. radiata 
40 Ctenodonta cf. obliqua 
41 Pterinea prolificus-demis- 
sa 
42 Hormotoma gracilis 
43 Sinuites cf. bdobata 
44 Aparchites rninutissimus 
45 Beyrichia parallela 
46 Bythocypris cylindrica 
47 Tetradella lunatifera 
48 T. simplex 
49 Ulrichia nodosa 
50 Calymmene callicephala 
51 Ceraurus pleurexanthe- 
mus 
52 Ceraurinus icarus 
53 Isotellus gigas 
54 1. cf. maximus 
It is significant of the above list that it embraces some of 
the most common of the English Head and Charleton species, 
but that many common forms of the Interior are wanting. Since 
nearly all the forms considered belong to the benthos in adult life, 
but plankton in the early stages when distribution is affected by 
currents, it is suggested that the Anticosti Richmond forms are 
of North Atlantic origin and were carried into the Mississippian 
sea by westward trending currents which made it almost impos- 
sible for interior species to reach Anticosti. 
One of the most striking examples of the parallelism between 
the Richmond faunas of the Interior and those of Anticosti is 
that afforded by the outcrops at Stony mountain in Manitoba, 
where out of a total of fifty-three identifiable forms, there are 
thirty which are present in the Anticosti rocks, and of these 
thirty species, no less than twenty-two are considered index 
fossils to the Richmond. The distribution of the species is also 
similar to that in the Anticosti beds, so that a correlation can be 
made with zones 3, 4, and 5 of the Charleton formation that is 
practically positive. 
