210 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
This he designates as the zone of Nemagraptus gracilis, and it in 
turn is followed by similar shales containing Dicranograptus clingant. 
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 lundibundus 
Taqt., Illaenus fallax Holm, I. 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 multisegmentatus Portl., 
Atrypa crassicosta Dalm., Leptaena rhomboidalis Wilckens, and Plasmo- 
pora conferta Milne Edwards & Haime. 
GASTRICKLAND. 
Nearly all the fossils from this region have been obtained from 
boulders found in the drift (Wiman, 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 C; 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 forficula 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 hmestone is a clay with glauconite and noduiel 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. 
