210 bulletin: museum of comparative zoology. 



This he designates as the zone of Xemagraptus gracilis, and it in 

 turn is followed by similar shales containing Dicranograptus clingani. 

 Of the fauna associated with this latter graptolite Hadding gives no 

 list, but the shales containing it are presumably those which Wiman 

 refers to the Chasmopslager, with Chasmops sp., Asaphus lundihundus 

 Tqt., lUaenus fallax Holm, /. gigas Holm, and Caryocystis granatum 

 Wbg. According to Moberg the Chasmops limestone is in places 

 found resting on the Orthoceras limestone. 



Above the Chasmops zone, but never seen in contact with it, is the 

 Brachiopod shale, from which only a few determinable fossils have 

 been obtained, among them Encrinurus midtiscgmentatus Portl., 

 Atrypa crassicosta Dalm., Leptaena rhomboidalis^\i\ckens, and Plasmo- 

 pora conferta Milne Edwards & Haime. 



Gastricklaxd. 



Nearly all the fossils from this region have been obtained from 

 boulders found in the drift (^Yiman, 89), but the record is of consider- 

 able interest, from its rather close similarity to the Esthonian develop- 

 ment. It appears to be the only part of Sweden where the Lower 

 Cambrian was developed in a region where the Middle Cambrian was 

 absent. The Chironkalk seems also to have been developed, in part, 

 as a Linsenschicht (corresponding to the Upper Linsenschicht of the 

 East Baltic) and the Chasmopskalk appears to have a development 

 comparable to a part of Ci of the Russian section. 



Unfortunately only the strata from the Ceratopyge limestone to the 

 Limbata limestone are found in place. 



The Lower Cambrian is indicated by boulders with fragments of 

 Olenellus, Agraulos, Ellipsocephalus, and Mickwitzia. 



The Obolus sandstone is indicated by boulders. 

 '^Fragments of shale with Ceratopyge forficida and two species of 

 Shumardia have been found. 



The Ceratopyge limestone is in place on the Island Limon and is 

 .83 meters thick. It contains the usual fossils. 



Above this limestone is a clay with glauconite and nodules of lime- 

 stone. It is 1.17 meters thick and contains few fossils, Lingula ?sp., 

 Acrotreta sp., and Torellella sp. being the only ones reported. This 

 corresponds to the "Glauconite sand" of Esthonia. By Wiman it is 

 united with the Ceratopyge limestone rather than with the Plani- 

 limbata limestone above. 



