112 CONTRIBUTIONS TO DEVONIAN PALEONTOLOGY. [bill. 244 
FAUNULES OF THE TIOGA SECTION. 
Zone 1 of Tioga section (14-60 A). — The 20 feet of sandstone expose! 
at the bridge, two-thirds of a mile north of Tioga, contains the f oj 
lowing species: 
Faunule of zone 1 of Tioga section ( 1460 A ) . 
[a, abundant; c, common; r, rare.] 
1. Stropneodonta (Douvillina) insequis- 
triata (c). 
2. S. (Leptostrophia) perplana var. ner- 
vosa (a). 
3. Strophonella cselata (a). 
4. Chonetescf. vicinus (c). 
5. Atrypa reticularis (r). 
6. A. spinosa (c). 
7. Sphenotus cf. archseformis (r). 
8. Macrodon cf. chemungensis (r). 
9. Leptodesma lichas (a). 
10. Schizodus chemungensis (r). 
11. S. oblatus (r). 
12. Modiomorpha cf. quadrula (r). 
13. Manticoceras cf. cornplanatum (r). 
The Chemung characteristics of this faunule, which is the lowest ir 
the section, indicate that the section includes nothing lower than Che 
mung beds. 
Zone 7 of Tioga section (14-60 A). — Very few fossils occur in th( 
zones 2 to 6. The following species are found in zone 7, 100 feet abow 
the base of the section: 
Faunule of zone 7 of Tioga section (1460 A). 
[a, abundant; c, common; r, rare.] 
1. Stropheodonta (Douvillina) mucro- 
nata (a). 
2. Orthothetes chemungensis (r) . 
3. Atrypa spinosa (c). 
4. Spirifer disjunctus (r). 
Zones 8 and 9 of Tioga section (1460 A). — These zones appear to b 
without fossils. 
Zone 10 of Tioga section (lJ/BO A). — The species noted in this zon< 
are as follows: 
Faunule of zone 10 of Tioga section (1460 A). 
[a, abundant; c, common.] 
1. Stropheodonta (Douvillina) mucro- 
nata (c). 
2. Atrypa spinosa ( c) . 
3. Spirifer disjunctus (a). 
4. Fish remains (c). 
The extremely mucronate form of Sp. disjunctus is found in thi 
zone. 
Zone 12 of Tioga section (11^60 A). — This zone contains a mass of fos 
sils, mostly shells of Sp. disjunctus. 
Zones 13 to 15 of Tioga section (14-60 A). — Fossils are comparativel; 
scarce in these zones. 
Zone 16 of Tioga section. — The faunule of this zone comprises th 
following species: 
