454 Transactions. 



Band H. — From the top of the pinnacles of the quarry to 

 about 30 ft. below the rock consists of a limestone containing an 

 appreciable quantity of sand-grains and a few glauconite-grains. 

 On treating a fragment of the rock with cold dilute hydrochloric 

 acid (HC1), and examining under the microscope the finer residue 

 which passed through a 90-mesh sieve, the insoluble matter was 

 seen to consist of grains of quartz, limonite, and glauconite. 

 One very interesting grain was thus isolated : it was a rock- 

 fragment which originally had consisted of two well-developed 

 crystals, one of plagioclase, the other of hornblende. The grain 

 had been derived from a holocrystalline rock of very probably 

 dioritic affinity. It is interesting to note that nowhere near the 

 district is there now to be found a rock capable of furnishing 

 such a grain. A partial analysis of the limestone gave : — 



Insoluble gangue . . . . . . 5-50 



♦Phosphoric acid (P 2 5 ) . . . . 0-15 



Not determined . . . . 94-35 



100-00 

 ♦Equivalent of calcium-phosphate, Ca 3 (P0 4 ) 2 - 33 



This band contains a large number of fossils, of which Brissus 

 (Meoma) crawfordi is the most common. The following fossils 

 were identified from this band : (1) Nodosaria subsimilis, Stache ; 

 (2) Cristellaria rotulata, Lamarck; (3) Textularia agglutinans (I), 

 d'Orbigny; (4) hexactinellid sponge; (5) Graphularia robince (?), 

 McCoy; (6) Actinometra, sp. ; (7) Cidaris, sp. ; (8) Echinus enysii, 

 Hutton ; (9) Brissus (Meoma) crawfordi, Hutton ; (10) Liothy- 

 rina gravida, Suess ; (11) Magellania lenticidaris, Deshayes ; 

 (12) Pecten fisheri, Zittel ; (13) Pecten hochstetteri, Zittel. 



Band G. — This consists of 3 ft. of a hard siliceous limestone 

 — less siliceous, however, than H, and with no glauconite-grains. 

 The lamina? are close together, and the only organic remains to 

 be seen are fragments of shells. 



Band F. — This band, which is only 2 ft. thick, is markedly 

 siliceous, and splits with difficulty. Ostrea wullerstorfii is con- 

 fined to this band, and is very conspicuous. The fossils identified 

 were (1) Liothyrina gravida, Suess, sp. ; (2) Ostrea mttterstorfii, 

 Zittel. 



Band E. — This is a tough limestone, 6h ft. thick, with the 

 laminae somewhat indistinct. It is speckled with glauconite, 

 especially in its lower portion ; in the latter I came across a 

 small coprolite, rich in phosphate of lime. The conspicuous 

 fossil of this band is Magellania sinuata, the others being but 



