WILLIAMS.] 
PERRY AND SQUARE LARK FAUNAS. 
St 
Parry. — The red sandstones of Perry and vicinity 1 contain a rich 
flora, which has been described more fully elsewhere, but in the pres- 
ent report :i list of eleven species is given on the authority of Dawson/' 
Dadoxylon onangon- 
1. Sternbergia=? 
diamim Daw. 
2. Aporoxylon sp. 
3. LepidodendroD gaHpianum Daw. 
1. Lepidostrobus richardsoni Daw. 
5. Lepidostrobus n. sp. 
6. Megaphyton sp. 
7. Psilophyton princeps Daw. 
8. Leptophloeum rhombicum Daw. J 
9. Cyclopteris jacksoni Daw. 
10. Cycloi>tci'is browniana Daw. 4 
11. Sphenopteris hitchcocki Daw. 5 
The age of this flora is determined as Devonian by the author of 
the species. The fossil plants were from layers of gray sandstone 
embedded in the red rocks, which is separated unconformably from 
lower "Silurian" rocks. The "bedded trap" is said to "spread over 
the Silurian rocks just as alluvium is spread over the solid rocks" in 
an exposure southeast of Perry. 
Squa/re Lake. — The fossils of the Square Lake fauna, as then iden- 
tified by Pollings, are as follows: 6 
1. Favosites gothlandica. 
2. Zaphrentis n. 8. 
3. Crinoids, 3 or 4 species. 
4. Strophomena, new species like S. punc- 
tulifera. 
5. Strophomena rhomboidalis (S.rugosa 
Hall) . 
'i. Strophomena, a new species. 
7. Rhynchonella wilsoni (var.). 
8. Rhynchonella n. sp. 
9. Rhynchonella n.sp., like R. acutipli- 
cata. 
L0. Spirifera perlamellosa. 
11. Atrypa reticularis. 
12. Athyris bella (Navista belta Hall) 
[sic]. 
L3. Platyostoma subangulata. 
14. Proetus n. sp. 
15. Bronteus n. sp. 
Other rocks are mentioned by Hitchcock as probably of the same 
age, but no fossils are named, and hence decisive evidence is lacking. 
The presence of the Lower Helderberg rocks at the base of S<|ii;iw 
Mountain and at Ripogenus Falls is given on the authority of Mr. 
Hodge, an assistant of Dr. Jackson. 7 
The Oriskany fauna was recognized by Jackson and W. B. Rogers 
in several localities previous to Hitchcock's report, but no careful 
determination of the fossils was made by them. 
The fossils of the Square Lake limestone were finally described by 
Billings in the Proceedings of the Portland Society in L869. 8 The 
6 Op. cit., p. 251, fig. 6. 
» Op. cit., p. 240. 
7 0p.cit.,pp. 
1 Sixth Ann. Rept. Secretary Board of Agriculture, p. '217. 
2 Op. cit., p. 248. 
■■ Of), cit., p. 219, flgs. :'. and 4. 
! Op.r-jt.,p.250,ng.5. 
- Descriptions of some new sp<'<-i<<- of fossils, \riti. remarks on others already known, from the Silu- 
rian and Devonian rocks of Maine: Proc. Portland Soc. Nat. Bist., Vol. I, Pt. II, \>\>. I"l 1 55, and 
plate with 28 woodcut figures of fossils. Portland, 18G9. 
