12 HINDE, ANNELID REMAINS FROM SILUKIAN OF GOTLAND. 



The Gotland exainples correspond closely with those from the 

 Clinton series of Canada, and also with those from the Wen- 

 lock series of the West of Enoiand. The forms are abun- 

 dant. 



Locality. Wisby. 



Euuicites corouatus, varieties a, b. c. Pl. 1, ligs. 14, 

 15, 16. 



Besides the very rcgularly formed examples of E. coro- 

 natus, there are other jaw plates evidently of the same cha- 

 racter but difFering in detail. It is just possible that they 

 may be paragnaths of distinct species of Eunicites, but for 

 the present I prefer to regard them as varietal forms of E. 

 coronatus. 



Var. a fig. 14. This form is less strongly arehed, the 

 greatest breadth is nearer one end, and the opposite end is 

 more prolonged, than in E. coronatus. The primary denticle 

 is missing, the three following are relatively large, triangulär 

 and blunt; these are succeeded by a series, 6 to 8 in nvim- 

 ber, of minu.te rounded denticles. Length 0,7 6; width 0,54 

 mm. This variety, in some respects, resembles the Euni- 

 cites chiro7norphus, H. from the Clinton series of Canada. 



Var. b. lig. 15. Jaw plate slightly arehed, the basal por- 

 tion somewhat prolonged and contracted; the ridge nearly 

 straight and furnished with about 10 triangulär blunted den- 

 ticles of different sizes. Length of crest 1; width of plate 

 0,83 mm. 



Var. c. fig. 16. Jaw plate triangulär, slightly arehed, the 

 base is extended into a curved shank, the crest has a regular 

 series of triangiilar denticles 7 in number. Lenoth of crest 

 0,5 8 mm., width 0,6 7 mm. 



The above varieties are all rare forms. 



Locality. Wisby and Fröjel. 



Eunicites pusilliis, n. Plate 1, figs. 17 — 20. 



Jaw plates diminutive, hollow and arehed; triangulär in 

 outline and carrying 7 to 10 denticles on the free margins. 

 In one form (fig. 18) the plate is strongly arehed and 

 there is a conical projecting denticle at each end of the 

 toothed crest. These jaw plates are evidently paragnaths and 

 differ from E. coronatus, principally in tlieir smaller propor- 

 tions and contracted bases. The length and breadth are about 



