358 
Details of Bores Nos. 1 to 11, etc.— continued. 
Bore No. 10 — continued. 
Depth (feet). 
Nature of Rock. 
' . . 
Details and Fossil Contents. 
310-320— 
continued. 
• • • • • • 
Gasteropoda.— Liopyrga quadricingulata, 
Tate ; Calyptroea corrugata, Tate ; Eglisia 
triplicata, Tate sp. ; Turbonilla weeahensis, 
Chapm. and Gabr. ; Marginella muscarioides, 
Tate; Terebra geniculata, Tate; Vaginella cf. 
eligmostoma, Tate (cast). 
Cirripedia.'—■ Balanus varians. Sow. ; Seal- 
pellum subquadratum, Chapm. 
Ostracoda.— ■Macrocypris tumida, G. S. B. ; 
Bythocypris tumefacta, Chapm. ; Bairdia 
amygdaloides, G. S. Brady ; Cythere normani, 
G. S. B. ; C. wyville-thomsoni, G. S. B. ; C. 
dictyon, G. S. B. ; C. lactea, G. S. B. ; C. post- 
declivis, Chapm. ; C. flexicostata. Chapm. ; 
Cytheropteron batesfordiense, Chapm. 
Pisces.— Fish remains, indet. ; otoliths of 
teleosteans. 
Notes on Bore No. 10. 
This bore shows a reversion to corresponding depths to those at which the 
Kalimnan is reached in Bore 8; whilst Bore 9 indicates a much greater thick¬ 
ness of Pleistocene deposits. At 160-186 feet the pebbly and micaceous 
shell-sand contains a varied fauna, indicating a shallow estuarine and marine 
deposit in which typical Kalimnan fossils occur, such as Mactra axiniformis 
and Lio'pyrga quadricingulata. 
The enormous Natica shell recorded from 220 feet was a fortuitous 
occurrence, as the shell had escaped comminution by being wedged into the 
boring auger. Its presence indicates extremely favorable life conditions, and 
a sandy, moderately-shallow water habitat. 
The green, micaceous clay met with at 225-230 feet, besides containing a 
typical Kalimnan assemblage, is especially remarkable for the great quantity 
of foraminiferal shells belonging to Rotalia beccarii, and which clearly indicates 
estuarine conditions. The Kalimnan persists to 254 feet. 
At 254-296 feet we have the first indications of Janjukian fossils, as 
Ditrupa cornea, var. wormbetiensis and Graphularia. This older facies is 
further augmented at 310-320 feet by the numerous polyzoa of Janjukian age, 
as well as the ostracod Cytherovteron batesfordiense. This bore terminates 
therefore with a mixed Janjukian and Kalimnan fauna. 
BOBE No. 11. 
Depth (feet). 
Nature of Rock. 
Details and Fossil Contents. 
Surface-1 
1-28 .. 
28-45 .. 
45-130 .. 
130-148 .. 
Brown loamy sand 
Pinkish concretionary 
limestone 
White sand 
Brown sand .. 
Grey sand and pebbles 
Containing a few grains of quartz. 
Sub-angular grains 
Grains rounded or sub-angular, some well 
polished. 
Sub-angular to rounded grains; pebbles well 
water-worn. 
