ANTICOSTI ISLAND FAUNAS. 
13 
28 Platystrophia dentata 
29 Rhipidomella uberis 
30 R. uberis rhyncho- 
nelliformis 
31 Schuchertella pecten 
32 Virgiana barrandei 
33 V. barrandei n. 
var. 
34 V. n. sp. 
35 Bumastes orbicaudatus 
36 Calymmene callicephala 
37 C. niagarensis 
38 Cyphaspis n. sp. 
39 Illsenus grandis 
Gun River Formation. Corals play a greater r61e in the Gun 
River than in any previous formation, but the common species 
are the same as those of lower horizons. Two large reefs occur 
in the southern outcrops, one at St. Ann cliff and the other at 
East cliff. They are not, however, in the same horizon and 
there is none on the north side. Fossils are abundant in almost 
every zone and the vertical range of each species is generally 
quite extensive. The total fauna consists of one hundred and 
thirty species of which forty-eight are brachiopods and these 
constitute fully eighty per cent of the individuals. Of the 
entire fauna eighty-seven originate in this formation and forty- 
four are derived from lower horizons. The formation has a 
thickness of 500 feet. The species are: — 
1 Buthotrepbis cf. gracilis 
2 Rusophycus bilobatum 
3 Cyclocnnitis gregarius 
4 C. intermedius 
5 Ischadites kcenigi 
6 Aulopora cf. precius 
7 Clathrodictyon vesiculosum 
8 Climacograptus typicalis n. 
var. 
9 Cyathophyllum euryone 
10 C. wahlenbergi 
11 Cystiphyllum niagarense 
12 Diphypnyll um csespitosum 
13 Favosites forbesi 
14 F. gothlandicus 
15 H a! y sites catenulatus 
16 Heleolites subtubulata 
17 Lyellia affinis 
18 Paleofavosites aspera 
19 P. aspera n. var. 
20 Petraia pygtnea 
21 Streptelasma latusculum 
22 Strombodes diffluens 
23 Syringopora verticillata 
24 Zaphrentis stokesi 
25 Z. n. sp. 1 
26 Z. n. sp. 2 
27 
Cornulites 
richmondensis 
28 
C. 
serpularius 
29 
Allonema 
curtum 
30 
Ascodictyon 
n. sp. 
31 
Ceramopora 
niagarensis n. 
var. 
32 
Corynotrypa 
dissi milis 
33 
C. 
elongata 
34 
Diploclema 
sparsum 
35 
Helopora 
bellula 
36 
H. 
concava 
37 
H. 
formosa 
38 
H. 
lineopora 
39 
Pachydictya 
crassa 
40 
Phaenopora 
ensiformis 
41 
P. 
excellens 
42 
P. 
superba 
43 
P. 
n. sp. 
44 
Ptilodictya 
gladiola 
45 
P. 
sulcata 
46 
Semnocoscinium n. sp. 
47 
Vinella 
radiciformis 
48 
Atrypa 
reticularis 
49 
Bilobites 
biloba 
50 
Brachyprion 
leda 
51 
B, 
philomena 
52 
B. 
n. sp. 1 
