RAYMOND: CORRELATION OF THE ORDOVICIAN STRATA. 215 
Limbatakalk — The greater part of the “Lower Red” probably 
belongs to this zone. Megalaspis limbata, Nileus armadillo, and 
Symphysurus palpebrosus are common here, and a number of other 
species were collected. 
Asaphuskalk — I did not find fossils other than Sphaeronis pomum 
and Megalaspis heros very common in this zone. Several other species 
have been reported, among them Phacops sclerops, Cyrtometopus 
clavifrons, Asaphus raniceps maximus, etc. The numerous cephalo- 
pods assigned to this zone in lists seemed to be derived from the lower 
part of the “Upper Red” and possibly to indicate the Gigas rather 
than the Asaphuskalk. Among these are Vaginoceras wahlenbergi 
(Foord), Bathmoceras linnarssoni (Ang.), and Estonioceras proteus 
Holm. Megalaspis gigas itself has not been found, but the cephalopods 
mentioned indicate, I believe, its zone. 
Platyuruskalk — Asaphus platyurus and Orthoceras tortum are 
reported from the upper part of the “Upper Red.” 
Chironkalk — The “Upper Gray”’ evidently represents the zones 
of both Illaenus chiron and Ancistroceras. JIllaenus chiron Holm, 
Ogygrocaris dilatata sarst Angelin, Ancistroceras undulatum Boll, and 
Discoceras teres Kichwald have been reported. 
The next formation, the Chasmopskalk, is not exposed on = side 
of Kinnekulle which I visited, but it is reported as being a dark green 
graptolite-bearing shale with lenses and layers of impure limestone. 
The graptolites are not listed, but the limestone is said to contain 
Chasmops sp., Remopleurides sealineatus, Ptychopyge? glabrata, Am- 
pyx rostratus, Echinosphaerites aurantium, ete. The thickness is ten 
meters. 
The Trinucleus shales, which are not well exposed, are said to be 
thirty-two meters thick and consist of two shales separated by a thin 
limestone. The lower twelve meters consist of black and greenish 
shales separated by two meters of limestone from eighteen meters of 
the red shale above. Among the forms listed from the upper shales 
are Remopleurides radians, co verrucosa, Trinucleus wahlenbergi, 
and Dionide euglypha. 
The Brachiopodenschiefer are said to be represented by twenty-six 
meters of calcareous shale below, followed by two and four tenths 
meters of impure sandy limestone. Fossils do not appear to be com- 
mon, Dalmanites mucronatus, D. pulchellus, and Homalonotus platy- 
notus being the chief ones reported. 
I visited Alleberg, but found it impossible to get good fossils without 
spending more time than was at my disposal. 
