16 HINDE, ANNELID REMAINS FROM SILtRIAN OF GOTLAND. 



and has a smootla ed^e. Leuo;th of tootlied edo-e 0,6 3 mm • 

 breadth 0,4 5 mm. Rare. 



Variety: basalis. Pl. 2, fig. 37. In this form the shank 

 is widely expanded, there is also a slight flange in front of 

 the denticles and these are carried on a low vertical'crest. 

 Therc are also some examples with tlie dentated erest and 

 flanse and with the shank narrow, similar to that of fiof. 36. 



Locality. Wisby. 



(Enouites? spinig-er, n. Plate 2, figs. 38 — 41, 41 a. 



Small triangulär plates, with straight or slightly curved 

 free margins, furnished with from 5 to 9 conical denticles. 

 A robust spine springs from the lower portion of the plate 

 and projects obliquely outwards. Both right and left plates 

 are present. The length of the toothed margin varies be- 

 tween 0,38 and 0,5 4 mm. and the width of the plate between 

 0,3 and 0,4 5 mm. The examples are rare. This form of 

 jaw is very distinct from any other of these fossils, nor have 

 I met with any recent annelid jaws with wdiich it can be 

 compared; consequently I have placed it only provisionally 

 under Oenonites. 



Locality. AVisby. 



Genus ARABELLITES, Hinde. 



Arabellites hamatus, Hinde. Pl. 2, figs. 42, 43, 44. 



1879. Arabellites hamatus, Hinde. Quart. Jour. Geol. Soc. Vol. 

 35, p. 377. Pl. 18, f. 12. 



The main portion of the jaw plate is oblong and pro- 

 longed forwards into a robust curved hook which is directed 

 obliquely inwards. The posterior extremity is obliquely trun- 

 cate with a knob-like elevation near the outer edo-e and in 

 front of this is a spoon-shaped depression; the margin is 

 smooth and rounded, and appears to have rested on the upper 

 surfäce of the underlying 'Supports'. In some examples there 

 is a slight flange in front of the denticles. The outer lateral 

 margin is gently curved, smooth and slightly inflated. The 

 free lateral surface is nearly straight and is furnished with 

 from 10 to 13 minute conical denticles, at its proximal end 

 the edge is smooth. The under surface has an obliquely 

 ovate aperture near its posterior end; the jaw is hollow quite 



