KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 23. N:o |2. 11 
O. intermedium MARKL. according to BARRANDE, but this is, as above sta- 
ted, quite different from the specimens which MARKLIN so named-: 
This species is, however, to be conserved as of BARRANDE, not of 
MARKLIN. 
Lindströmi BARR. 
Lovéni BARR. 
pseudo-imbricatum BARR. the same as O. imbricatum His. 
refragans BARR. probably the same as O. Hisingeri Bor. 
Sjögreni BARR. 
temerum BARR. synonymous with O. ornatum Borr. 
BARRANDE also named a Phragmoceras from Gotland, of which he had received a 
figure from ÅNGELIN, as P. Angelini. It can not be decided which fossil is meant there- 
with, as it is not possible to get access to the correspondence of BARRANDE; It is best not 
to adopt it. In the same volume BARRANDE, p. 686, gives a general view of the Cephalo- 
poda of Sweden, according to information given him by AÅNGELIN in 1860. It concerns 
chiefly the occurrence of the generic groups. 
In his »Parallele entre le dépöt silurien de Scandinavie et de la Bohéme» p. 25 BAR- 
RANDE says: »Malgré la trés-frappante analogie de leurs formes «avec celles de notre cal- 
caire inferieur E. nous n'avons cependant constaté jusqu'ici que trés peu d'identités speci- 
fiques. Nous citerons seulement: Orth. annulatum MuRrcuH.(!) et O. dulce BARR., qui paraissent 
étre communs a Gothland et a notre étage E.» — BARRANDE also cites on the authority 
of BiGsBY, Thesaur. Sil., Orth. Wahlenbergii HELMERrs. as from Gotland, but in the The- 
saurus p. 182 there stands only »Sweden» as the locality, whereas in the paper of HrEL- 
MERSEN there is no O. Wahlenbergii at all mentioned, nor can I find that he has described 
it elsewhere.') 
In 1867 the author of this memoir published a catalogue of the Gotland fossils then 
known and there are 14 species of Cephalopoda enumerated, including Inachus costatus, 
In the last List of 1888 there are 37 species. It is impossible at present to evalue nu- 
merically the species, which compose the Cephalopodan fauna of Gotland. It may be 
enough to know that all genera, which are described from the Upper Silurian (E) of Bo- 
hemia, excepting Mesoceras also have been found in Gotland. Besides, there may be two 
or three new generic types more, one amongst the Ascoceratide and two amongst the 
SSC 
Phragmoceratide. 
In the following pages the Ascoceratide and the Lituitide have been described. 
Unless otherwise stated the material forming the basis of these descriptions, belongs to the 
Palzxeontological Department of the Swedish State Museum at Stockholm. 
1) Borr 1. ce. p. 15 has described a Lower Silurian species as O. Wahlenbergil. 
