1880.] On the Triassic Formation of the Atlantic States. 703 
| P E FR E TB 
et A pal eo |; & ae 4 
S584 6481 34 bee 
s)e/ Se; 5) a) 213] 3 
Bi <=) ealeala) ala] ds] & 
Si Nongopterm .6 wads iss 07 | 79 | 23 | 42 | 17 27 | 63 | 02 
Ephemeride osses.: 07 | 75 | 08 | 32 | 09 27 | 63 | 02 
Welle sca ces esris | 14 
PAV OR ERT O 07 | 63 | 08 | 18 | 09 27 | 63 | 02 
Palingenia........ | o4 
Agrionini (pupæ)...... | 04 
hryganeidee (larva) | 15 | 10 | 08 6 
Ill. CrusTAckA..... | Or | 04 33 ix 4 
E i a E A | 03 pe 
Gammarus, yg......... | of 
Crangon MaA | 
ane dentata Sm.. 93 
Re acada igs pss cus oF = 
Oid EEEREN mis 
nsionenninedl OTY à “a 
7, cad 24 27 
Undetermined T TTN o5 
D niid o6 
fo RE E oF 
MAWE as seers sks 95 
Daphnella Aai “> 
Lynceidze ol 93 
eae: 
Burycerens., ose. 6s. me 
d Copepoda zess vies iwacie or | o4 05 1z 19 
NIU E S o1 | 04 05 = 19 
Confervoid Mg era. oN se 
ON THE FORMER EXTENT OF THE TRIASSIC 
FORMATION OF THE ATLANTIC STATES." 
BY ISRAEL C. RUSSELL. 
Neseey two years since I read a paper before the New York 
Academy of Sciences, on the Physical History of the et 
sic Formation in New Jersey and the Connecticut valley,’ in 
which many reasons were given for concluding that the Triassic 
rocks of these two regions were detached portions of one estuary 
formation. eee 
As several papers have been published relating to the Triassic 
rocks of the Atlantic States since my essay was written, increas- 
ing our knowledge of the subject, and as my interpretation of the 
geological records has not been accepted by some eeehe; I 
1 Read before the New York Academy of Sciences, March 22, 1880. 
* Annals of the N. Y. Acad. of Sci., Vol. 1, No. 8 (1878), = ' 220-254. 
