Om Skånes brachiopodskiffer 
91 
Pteropoda. 
Hyolithus Mobergi n. sp. 
Pl. II, f. 27—29. 
Length 34 mm., width of aperture 6 — 7 mm. Apical angle 13° — 14°, 5; the pointed 
end, being more prolonged, is slightly unsymmetrically curved. The convex side 
has a rounded keel. Entire surface of shell marked with very fine and close lines 
of growth, straight on the ventral side, arching forward on the dorsal one, forming 
a rounded anterior lip. — Most specimens are compressed internal casts almost 
without ornamentation. — Operculum concentrically striated, consisting of an out- 
wards bent semilunar ventral and a halfconic dorsal part with incurvate sides, 
forming an angle of about 90°. 
Hyolithus sp. ind. On the operculum, figured on pl. II, fig. 26, also the 
ventral part forms a half-cone. This specimen probably belongs to another species. 
Hyolithus (Orthotheca) flbrosus n. sp. 
Pl. II, f. 30. 
Apical angle about 14°. Only compressed specimens are met with. Both the 
dorsal and the ventral side seem to have, been convex, the latter, however, most. 
The ornamentation being identical on both sides is very characteristic. It consists 
of closely lying straight, longitudinal raised lines, increasing in number towards 
the aperture by regular intercalations of new lines, i. e. by repeated dichotomy of 
the furrows. At the broad end of the shell 3 or 4 series of lines :re to be seen. 
These lines are crossed by transverse straight ones of irregularly varying sizes. 
Ostracoda. 
Concerning the orientation of the shells of the Beyrichiidae the author agrees 
with the opinion of Jones, Moberg & Grönwall, Bonnema &c. 
Primitiella tenera Lnrsn. 
Pl. II, f. 1—3. 
Linnarsson’s diagnosis of this species is here completed with a description 
of compressed specimens, two of which are shown on pl. II, f. 3. They are charac- 
teristic by the constant distribution of the tubercles and are thought to be synonymic 
with Jones’ species named Primitia. unicornis Ulrich from Bala beds, near Welsh- 
pool, Montgomeryshire. 
