ORTMANN : TERTIARY INVERTEBRATES. 
283 
I. 
J x Scutella patagonensis. 
2. 
J 
Rhynchonella plicigera. 
3* 
J x 
Terebratella patagonica. 
4- 
L 
Perna quadrisulcata. 
5. L & S x 0 street, ingens. 
6. J & S x Pccten geminatus. 
7. S Lucina promaucana . 
8. P Cardinal puelchum. 
9. 5 Amathusia angidata. 
10. S x Scalaria rugulosa. 
11. Lx Turriiella ambulacrum. 
1 2. .S' x Strutkiolaria ameghinoi. 
1 3 . J Siphonalia noachina. 
This fact is the more important since just these species belong to the 
most striking and characteristic features of this series, especially those 
marked x. 
Finally, I offer here a list of the so-called characteristic species of 
Juliense, Leonense, and Suprapatagonian beds, which have been found 
associated in one and the same block: 
Darwin Station , San Julian: 
J & S Pecten geminatus J Pecten prcenuncius. 
Mouth of Santa Cruz River: 
Block 1 : .S' Area patagonica. 
Block 2: J Pecten prcenuncius. 
f J Terebratella patagonica. 
Block 3: \ 0 A 
\ 6 Area patagonica. 
Block 4: P Cardita incequalis. 
Block 5: .S' Cucullcea darwini. 
Block 6a: 5 Area patagonica. 
Block 6b: .S' Area patagonica. 
L Turritella ambulacrum. 
S Dosinia ineridionalis. 
S Amathusia angidata. 
L Strutkiolaria ornata. 
S Dosinia ineridionalis. 
L Turritella ambulacrum. 
L Turritella ambulacrum. 
P Cardita incequalis. 
L Strutkiolaria ornata. 
S Strutkiolaria ameghinoi. 
S Marginella plicifera. 
S Strutkiolaria ameghinoi. 
Other instances, where Suprapatagonian species not recorded under 
the characteristic forms are found (at Santa Cruz) associated in the same 
block with Patagonian, are the following: 
Block 7: .S' Leptothyra philip pii (Cossm.). L Turritella ambulacrum. L Strutkiolaria ornata. 
Block 8 : 6" Leptothyra pkilippii. L Turritella ambulacrum. 
Block 9: 6" Bulla patagonica (v. Ih.). J. Terebratella patagonica. 
Leptothyra philippii is also found in block 5, Bulla patagonica in block 
1, 2 and 4. Nucula patagonica (P) is in block 6b. 
Mt. of Observation : 
Block 10: .S' Modiola ameghinoi. P Cardita incequalis. 
Arroyo . Gio : 
Block 1 1 : J & S Pecten geminatus. S Dosinia ineridionalis . L Turritella ambulacrum. 
