Uttley. — Reynarlis on Bulletin No. 20. 177 



this glaiiconitic sandstone lies directly on the Oamaru stone (Ototaran), and 

 in fig. 25 is separated from the "■ jmrhi " band by nodular greensands. In 

 fig. 27 (p. 64) the '' parki" band is not present, but 24 ft. of glauconitic 

 sandstone is shown lying above the limestone and classified as Hutchin- 

 sonian, but whether Upper or Lower is not stated. In figs. 26 and 27, 

 then, this glauconitic sandstone cannot represent the Upper Hutchinsonian. 



In fig. 15 a section is given in Landon Creek showing at the top of the 

 Hutchinsonian a " hard brown calcareous sandstone, thickness of 6 ft. 

 exposed," from which were obtained the brachiopods Pachymagas 'parhi 

 (Hutt.) and Rhizothyris rhizoida (Hutt.). This is Park's Lower Hutchin- 

 sonian, and the Upper Hutchinsonian is therefore absent. Fig. 15 is 

 important, as it enables us to correlate the beds in the Landon Creek 

 area with those in the Oamaru area. It will be noted that the upper part 

 of the Oamaru stone is a bed of " hard semi-crystalline limestone," which 

 is overlain by looser greensands containing Isis dactyla Ten. -Woods, and 

 these are capped by "a hard brown calcareous sandstone containing 

 ■Pachymagas parki (Hutt.) and Rhizothyris rhizoida (Hutt.).'" The sequence 

 is the same as at All Day Bay, only in the present locality the nodular 

 surface of the hard limestone is not so evident. 



On page 46 Park gives a classification of the beds in Landon Creek, 

 and shows that the limestone beneath the " hard semi-crystalline limestone " 

 is glauconitic. This is the c^se in the whole of the Landon Creek area, 

 and it is extremely probable that bed b of fig. 25, bed h of fig. 26 (both 

 of which underlie nodular greensands), and bed b of fig. 27 represent 

 this upper glauconitic portion of the limestone. The nodular greensands 

 (" Isis " beds) just referred to contain Isis dactijla Ten. -Woods, Aetheia 

 gaulteri (Morris), and TerebratuUna suessi (Hutt.), and they lie immediately 

 beneath the " farki " band. The fossils collected by the writer from 

 these beds have already been published (1918b, pp. 122, 123), and, although 

 these lists are incomplete, they indicate that the sequence is similar to that 

 of the Kakanui district. In the Landon Creek area, then, the highest beds 

 present are the " parki " beds (Park's Lower Hutchinsonian of the Oamaru- 

 Kakanui areas discussed above), and his Upper Hutchinsonian is non- 

 existent. 



The writer has attempted to show that in the coastal district, where 

 the Awamoan beds occur above the greensands, the base of the Awamoan 

 is termed Upper Hutchinsonian ; that in the Landon Creek area, where 

 the " -parki " band is the highest horizon present, either this bed- or 

 underlying beds are termed Upper Hutchinsonian. In other words, the 

 Hutchinsonian greensands with Pachymagas parki are overlain directly by 

 the Awamoan beds, and the " Upper Hutchinsonian " of Park is applied 

 to different horizons in different parts of the district, and is therefore 

 inadmissible in classification. 



On page 48 a section is given in which the Oamaru stone is shown 

 capped by a bed of hard semi-crystalline limestone, which represents the 

 upward limit of the Ototaran. The sequence is similar to that at All Day 

 Bay (p. 56), west branch of Landon Creek (p. 46), Deborah (p. 59), Kakanui 

 (p. 70). In the present locality and in the locahties just mentioned the 

 overlying greensands contain Isis dactyla Ten. -Woods, Mopsea hamiltoni 

 (Thomson), Aetheia gaulteri (Morris), TerebratuUna suessi (Hutt.), and there 

 is no doubt that these greensands are all at the same horizon — the base of 

 the Hutchinsonian. Now, these greensands (bed m of fig. 17) are said to be 

 the same as bed g of fig. 28, and the latter bed is said to be Upper Hutchin- 

 sonian (Waitaki stone), which is impossible, as the fossils are the fossils of 



