254 
451 Crinoidssesments seer ee Oe ee ean eee aaa 
5. Dalmanella testudimana (Dalman)e 5 ee 5 sce) - a2 aes aaa 
6. Hemiphragma tenuimurale Ulrich ......:.....2... 2. a 
ie Usotebisveicas nes Koger. 8 Pn ae Uh eke ic ene ce 
3: SMitoclemazemundulum Ulrich -.,-..0 4.5 56h Jo eee r-¢ 
0. ‘Nematopord dvalisau lich) yo 2 Sie oo ok hoe eee r-¢ 
LO \Pachydtety accuses (ball) a ote: Fahl sc Co bt eee ce 
th. Paehydietyastimbreste Atiricnys oc 0564 2.6. Ue See r 
12> sPlatysecophia- trentQuensig 1. SD. >. a0. 4! 4.7 ole pte e 
13. Plectambonites sericeus (Sowerby)................. r-¢ 
14. Prasopora simulatrix orientalis Ulrich ................ a 
15: Rafimesquina alternata (Hmmons) | 4: 2. 2.225 nee r 
NOs) weRibinidicthya ex oma. Wilmichy = iis) cette oee a eee r 
i Rhimidictya paupera Ultich>. °c. 04..c2. sc. eho nae r-¢ 
5. Mill Dam Falls. 
The Mill Dam Falls or Fourth Falls is formed of thin bedded, rather 
coarse-grained and fossiliferous limestone. The following species were 
identified: 
t.. ) Chasmotoporsa reticulata, (ball): 2425. 2-0 2c eee c 
Ze AGTINOIG es SELIMGIMES ste, ose ek. ON bye oe ae een ee a 
3. Dalmanella testudinaria (Dalman)........ 2 a 
4. Plectambonites sericeus (Sowerby)................... a 
he Riimidichys paupera Wiel 26 cass isk. bela ei eaeer r-¢ 
6. Power Dam Interval. 
The Power Dam Interval includes almost all of the division of the Prosser 
and Cummings report except the upper few feet, which were collected from 
separately. The base of this interval is marked by a heavy stratum of lime- 
stone. Above this lies thin-bedded compact lime-stone, part of the strata 
somewhat crystalline, separated by shaly layers. At the upper end of the 
gorge the layers show the greatest amount of folding visible anywhere in the 
Trenton Falls section. The strata are very fossiliferous and the following 
species were collected: 
ite \Galymene senaria’ Conrad <.. 4592.25 4 ce eee a 
bo 
Geramoporella;distineta, Wilrichys-= 2... oe ee eee c 
3. Chasmotopora reticulata (Hall)... .......460s..00-00. aaa 
