Notices of Memoirs — E. ErdmanvUs Swedish Geology. 411 



on the angle of the whorls, become obsolete at the shallow suture, 

 and are twisted at the base : coarse spiral threads cross the longi- 

 tudinal grooves and ridges, rising on the latter into low scarcely 

 noticeable tubercles. Whorls about nine, increasing very gradually, 

 slightly angulated, the last forming more than one-half the length 

 of the shell. Aperture rather narrow. Columella twisted, bearing 

 one spiral plait. Outer lip simple, having 12-15 entering grooves, 

 and furnished with a small sinus near the anterior canal ; joined 

 posteriorly with the body- whorl by a callus. Length about 21, 

 breadth about 10 mm. 



Columhella pecuUaris^ PI. XVIII. Fig. 20, 



Cylindric-suboval, often a little distorted ; whorls six, slowly in- 

 creasing, the last forming about ^ ; spire obtuse ; suture somewhat 

 irregular or dentate ; aperture small, pointed above, peristome simple, 

 columella simple, truncate. 



Pliocene, Trinidad. Perhaps allied to C clausiliformis, Kien., but 

 of shorter and more ventricose figure. 



Planaxis crassilabrum, n. sp., PI. XVIII. Fig. 13. 

 Conic-oblong, somewhat flattened, smooth ; spire conic ; outer lip 

 dentate, much thickened and somewhat everted; columella flattened, 

 boldly truncate, spirally striate; anterior canal short, open; posterior 

 canal narrow, separated from the body- whorl by one or two stout 

 teeth. 



Pliocene, Trinidad. 



{To he concluded in our next Number.) 



iTOTiOiES o:f 3yn:Bi^.a:oii2-s. 



La kechekche G-eologique de la Suede. — " Description de la 

 formation Carbonifere de la Scanie." By Edvard Erdmann. 

 With a geological map and 4 plates of plans and sections. 1874. 



THIS Memoir is published in a bilingual form, the French trans- 

 lation, which precedes the Swedish text, being somewhat 

 abridged. This Coal-bearing formation in Scanie is said to be of 

 Liassic age, the true " Carboniferous " being entirely absent. The 

 other rocks of the district are, crystalline rocks, gneiss, etc. ; the 

 Cambrian formation, to which are referred certain quartzites ; Lower 

 Silurian, which include alum-shales, Orthoceratite limestone, and 

 argillaceous schists. The Upper Silurian is also represented by 

 limestones and schists, the former rich in fossils, but the schists so 

 like those of the Lower division that they are represented by one 

 colour on the map. The next following beds are Eed Sandstones 

 and shales, probably of Triassic age, but no unconform ability to the 

 Upper Silurian has been detected as yet ; in fact some of these Red 

 Sandstones were referred by Murchison and Angelin to the Upper 

 Silurian ; no fossils have been found in them. On these red beds 

 follow directly the Coal-bearing (Jurassic) strata. But probably 

 the Hor sandstone should be intercalated here, although not found 

 in direct relation to any of the former stratified beds, for, from the 



