10 HINDE, ANNELID KEMAINS FROM SILURIAN OF GOTLAND. 



somewliat narrower than iu front. The central portion in front 

 is depressed. Length 0,6 7 mm.. Avidtli 0,i8 mm. All tlie spe- 

 cimens are incomplete at the distal ends. The only portions 

 of the jaw apparatus to which these small bodies can with 

 any probabilitv be referred are the Supports (Träger). They 

 are comparatively abundant and very uniform in size. 

 Locality. Wisby; Fröjel. 



Eunicites cristatus, Hinde. var. Pl. 1 fig. 6. 



1879. Arabellites cristatiis, Hinde. Quart. Jour. Geol. Soc. Vol. 35 

 p. 378. Pl. 19 f. 7. 



Jaw consisting of a compressed, rudely triangulär, hollow 

 plate with a short obliquely extended shauk, the upper or free 

 surface is slightly concave ; the free margin is furnished whith 

 a series of about 12 rounded denticles of which the first is 

 i;sually smaller than those immediately succeeding. Length 

 1,06, width 0,8 3 mm. In general form the examples resemble 

 the Canadian species, but the denticles are relatively shorter. 

 In my description of the Canadian examples I placed them 

 under Arabellites ; but a further study of existing species of 

 Arabella and Eimice indvices me to regard these and similar 

 forms, in which the primary denticle of the jaw is not develop- 

 ed into a prominent hook, as more closely resembling the 

 hxrge dental plates (Zahnstlicke) of Eunice, than of Arabella. 

 All the examples met with belong to the right half of the 

 jaw-sac. 



Locality. Fröjel. 



Eunicites hebes, n. Pl. 1 figs. 7, 8, 9. 



Jaw plates elongate, slightly concave on the upper sur- 

 face, widest at the anterior margin which is slightly incurved, 

 straight or rounded and is extended to form a short blunted 

 shauk: the posterior extremity is obtusely rounded; the free 

 edge carries a series of 13 to l5 rounded blunted denticles, 

 which project but slightly from the börder of the plate. 

 Variable in size, a fairly large example is 0,9 6 mm. long by 

 0,54 wide; whilst a small example is only 0,4 by 0,24 mm. 

 Figs. 7 and 8 are large dental plates of the left side, whilst 

 lig. 9 belongs to the right side of the jaw-sac. 



Locality. Wisby. 



