44 G. LINDSTUOM, UN THK SlLUUiAN GASTKUFOIJA AN]; I'TEKdPODA OF GOTLAND. 



t!io "Dictiounairc des Sc. Nat." where it is stated that De Fkance has uained it. 1 

 only iind in vol. .'^2 p. 193, article "Mollusquesu, which is entirely written by Blain- 

 viLLE, »Conul. Sowerbii Diofu. Diet, des Sc. nat., Fossiless, but on turning to that 

 article nothing at all is found concerning Conularia. The accompanying figures are 

 exact coi)ies from the Mineral Conchology of Sowekuy of his C. quadrisulcata, which 

 no doubt is a Carboniferous species. C. Sowerbyi is consequently a synonym of this 

 species and not of the Silurian one. When thus neither the name C. quadrisulcata 

 nor C. Sowerbyi can be employed, we are obliged to adopt the next in chronological 

 order and then we have three described, all at the same time, by Sandbekgejc. JjuI 

 these three s[)ecies, cited above, are only synonyms. Of these I have chosen C. can- 

 cellata as being given to the species of the »Silurian System)). C. curta has the prio- 

 rity but is very unappropriate and seems to be founded on a spurious specimen. As 

 Salter, App. Brit. Pal. Fossils j). VI, remarks, the Devonian C. Gerolsteiniensis d'Arch. 

 & Vekn. is so nearly related to this, that it may be considered as a variety. 



Amongst the American Conularia:, described by Hall, C. trentonensis, Pal. N. 

 York vol. 1 p. 222, possibly is the same as Con. cancellata. See also Eichwald Leth. 

 ross. 1 p. 1057 on Con. trentonensis. 



2. Conularia monile n. 



PL I, figs. 9—12. 



Shell formed as a regular, foursided, narrow and elongated pyramid. The trans- 

 verse section of the aperture is a regular quadrate having each of its corners inflected 

 by a groove. The shell substance is comparatively thicker in this than in the other 

 species and consists of an exterior, darkly coloured stratum, which is thicker than the 

 interior thin and pale one. The ornamenting, transverse ridges, of which eight are 

 contained within a length of 2 raillim., are bent in an obtuse angle, larger than in any 

 other Swedish species. Its apex is situated exactly on the median axis of the face. 

 The interstitial furrows are quite as large as the ridges or a little narrower. The ridges 

 near the apex of the shell are smooth or nearly so, higher u\) they are closely studded 

 by narrow, elongated, laterally compressed or sharply edged lamelke, ending in an 

 accuminated point upwards and placed in oblique rows on the ridges, their lower a})ex 

 turned against the median axis. The intervening furrows are quite smooth. On the 

 nucleus, where the shell has been destroyed, there is an impression of a median ridge, 

 nearly one niillim. broad. It runs on the inside of tlie shell along the median axis of 

 eacli face, thus corresponding to the line which may be thought combining all the 

 apices of the angular ridges on the outside. It forms consequently a blunt, longitudinal 

 ridge on the interior wall of the shell. Height 24 millim., diameter at the aperture 14 

 millim., diameter across the lower broken end 5 millim., diagonal line at the upper 

 aperture 14 millim., diagonal at the lower end G millim. Found only once in the 

 limestone strata b near Wisby. 



