Marshall. — Boulders in Triassic Conglomerate, Nelson. 467 



fortunately, well preserved, and bears a resemblance to the 

 Harpaotocarcinus tigured by H. Woodward in the Quarterly 

 Journal of the Geological Society (xxii., 51), but it is not that 

 genus. 



Crassate.lla australis was plentiful, Trochus chathimensis, 

 and a number of corals. A few fragments of leaves were 

 found, and the vertebra of a fish having a centrum 1 in. in 

 diameter. 



Section across Waitaki River Three - quarters of a Mile below 



THE JUNCTIOJST OF THE WhAREKURI CrEEK. 



a. Recent river gravels. 



b. Terrace gravels and silts, wicli moa bones. 



c. Sandy shell beds full of fossils. 



d. Dark-green sandy beds. 



Following down the bed of the river, the section exposed 

 for a mile or two is a cliff of about 20 ft. of tine sandy 

 material full of the most delicate and beautiful specimens of 

 fossils — huge specimens of Dantalimn giganteum, brachio- 

 pods of several species, Natica, Twrritelia, Limopsis, Lima, 

 and a number of small species. A very fine collection could 

 be made here by careful search. The conditions under which 

 the beds were deposited seem to have been very favourable 

 to the development of all forms of animal life in land-locked 

 shallow seas with a mild climate. 



EXPLANATION OF PLATES XXXVII. AND XXXVIII. 



Plate XXXVII. 

 Aturia ziczac. 



Plate XXVIII. 

 Section of Aturia ziczac. 



Art. XXXVII. — Boulders in Triassic Conglomerate, Nelson. 



By Dr. P. Marshall, Lecturer in Geology, Otago School 



of Mines. 

 [Read before the Otago Institute, 9th June, 2903.] 

 Plates XXXIX.-XLL 

 The following descriptions of rock-sections are given in the 

 hope that they may help in forming an accurate idea of the 

 age of many of the igneous rocks occurring in the older forma- 

 tions of the Nelson Province. In many cases the age of 



