WILLIAMS AN 
KINDLE 
" D l 
FAUNULES OF GOLF BKOOK SECTION. 
99 
The occurrence in this zone of Sp. 'mesistrialis, associated with 1). 
mesieostalis, is noteworthy since in normal sections the first form pre- 
cedes the latter, the reverse of the order of their appearance in this 
section. The two forms have been very seldom found in association. 
Zones 25 and 26 of Gulf Brook section (U r 55 J.).— The 26 feet of 
beds comprising these zones are nearly barren of fossils. 
Zone 27 of Gulf Brook section (14-55 A). — This zone contains the fol- 
lowing- species: 
Faunule of zone 27 of Gulf Brook section {1455 A). 
[a, abundant; c, common; r, rare.] 
1. Stropheodonta (Douvillina) mucro- 
nata (r). 
2. Chonetes setigerus (a). 
3. Spirifer mesistrialis (r). 
4. Delthyris mesieostalis (r). 
5. Ambocoelia gregaria (a). 
6. Leptodesma cf. spinigerum (c). 
Zone 28 of Gulf Brook section (1455 A). — Crinoid stems are the only 
fossils recognized in this zone. 
Zone 29 of Gulf Brook section (1455 A). — Fossils are scarce at this 
horizon; the following species occur rarely: 
Faunule of zone 29 of Gulf Brook section ( 1455 A ] 
1. Crinoid stems. 
2. Chonetes setigerus. 
3. Camarotcechia sp. 
4. Palseoneilo sp. 
Zones 30 to 32 of Gulf Brook section (1455 A). — These beds are 
nearly barren of fossil remains. 
Zone 33 of Gulf Brook section (1J/S5 A). — Fossils are scarce at this 
horizon, only three species being secured, namely: 
Faunule of zone 33 of Gulf Brook section (1455 A). 
1. Orthothetes chemungensis (rare). 
2. Productella speciosa (common). 
3. Delthyris mesieostalis (common). 
Zone 3Jf, of Gulf Brook section (11^55 A).— Twenty-five feet of bar- 
ren, thin-bedded sandstone follows the last zone. 
Zone 35 of Gulf Brook section (1455 A). — Six feet of gray shale 
afford the following faunule: 
Faunule of zone 35 of Gulf Brook section ( 1455 A ) . 
[a, abundant; c, common; r, rare.] 
1. Orthothetes chemungensis (a). 
2. Chonetes setigerus (c). 
3. Schizophoria striatula (c). 
4. Spirifer cf. mesistrialis (r). 
5. Delthyris mesieostalis (c) . 
6. Ambocoelia gregaria (c). 
7. Palseoneilo sp. 
8. Leptodesma spinigerum (c). 
