Fossils from Alulde, Gotland. 145 



TrochiUCj gen. et sp. indet. 



Four columnals rather higher, apparently with circular 

 body, circular flajigc, ami pentagonal lunacn. The facet id in 

 otie s|)ecinicn (tig. 7) divided into a depressed central area and 

 an elevated outer area, tlio latter divi'led into aljout twelve 

 rounded portions (knobs almost) by grooves radiating from 

 the central area. In this, and in all the rest to a less extent, 

 the flange is seen to be composed of concresced tubercles. 

 Totid width of this is about 1*2 millim. 



Compare flanges of (jrissocn'nii'i verrucosus^ Bather (Grin. 

 Gotland, Svenska Vet.-Akad. llaudl. vol. xxv. no. 2, pi. x. 

 figs. 371, 372, .'575) ; but the facet is not similar. 



[F. A. B.] 



ANSULOSA. 



Class ANNELID A. 



Order POLYCiLETA (Tubicola). 



CORNULITES, Schlotheim [1820]. 



CornuUtes scalar if or mis, Vine. 



Comulites scalariformis, Vine, 1882, Quart. Journ. Geol. Soc. 

 vol. xxxviii. p. 379, pi. xv. figs. 1, 9, & 10. 



Our specimens are characteristic in general form, but 

 dwarf>'d, being only half the size of the specimens found in 

 the Wenlock Shales by Vine. 



Silurian; Mulde, Gotland. Rare. 



Conch ICOLITES, Nicholson [1872]. 



Conchicolites Nicholsonii, Vine. 



Conchicolites Nichohonii, Vine, 1882, Quart. Journ. Geol. Soc. 

 vol. xxxviii. p. 381, pi. xv. fig. 2. 



This species was originally described from the Wenlock 

 Shales of this country, and Vine also found it in material 

 from Gotland. 



Our specimen is probably a young tube, since it measures 

 only i inch (3-125 millim.) in length. 



Silurian ; MiiKle, Gotland. 



ConchicoUte.s tuhercuU/era, sp. n. (Pi. III. fig. 4.) 



Tube calcareous, tapering, slightly curved; avera^fing 

 3 millim. in length, diameter of mouth about 1 millim. 



