144 G. LINDSTRÖM, ON TIIE SILURIAN GASTKOrODA AND PTEROrODA OF GOTLAND. 



Whorls. II. Br. 



1 10 14 



2 7 11 



3 5 8 



4 4 6 



5 3 5 



6 2 4 



The increase is consequently inore rapid in the youngest whorls. The suture is 

 rnoderately deep and the whorls are regularly rounded down to it, without any con- 

 striction. The apices of the angular striaj are placed on the middle of the whorls 

 and resemble those of Lox. sinuosnrn. H. 32 inillim., br. 14 inin. 



Only one specimen has been found in the upper limestone near Wisby and there 

 are also sorae from Westergarn. 



4. Loxonema strangulatum n. 



Pl. XV fig. 8—10. 



Shell turriculate, long and slender, of at least six whorls. As may be seen by the 

 dintiensions, given below, the whorls are of nearly double the height against the width. 

 They are only rnoderately ventricose, as to appear almost cylindrical, the suture is 

 oblique, more so than in the other Gotland species. The lowest part of the whorls 

 is constricted in a rather broad belt just above the suture. The ornamentation con- 

 sists of the usual strias, bent backwards on the middle of the whorls in a sharp reet- 

 angular sinus. 



Height of longest specimen from Östergami 47 millim., br. 8 mill. Height of 

 second whorl in the Klinteberg specimen figured 8 millim., breadth 5 millim. 



Found in the limestone of Östergarn and Klinteberg. 



5. Loxonema ? fasciatum n. 



"Pl. XV fig. 11, pl. XX fig. 7. 



Shell slender, elongate, turriculate, with about 16 slightly convex whorls, glossy, 

 though covered with exceedingly minute transverse stria3, which are curved backwards 

 in an angle. The apex of this angle is obliquely arched and taken together the apices 

 of all stria^ form, exactly above the median line of the whorl near the upper suture, 

 a relatively large band, somewhat resembling the slit band in Murchisonia, as for in- 

 stance M. crispa. It is however not clearly defined from the ambient surface, through 

 bordering lines and the species may, untill further information is gained, be left with 

 Loxonema. The whorls are a little longer than broad. The aperture is ovate. H. 13 

 millira., br. 2 mm. 



A few specimens have been found in the red limestone of Sandarfve kulle. 



