14 HINDE, ANNELID REMAINS FROM SILURIAN OF GOTLAND. 



directed backwards; the anterior denticles are frequentlj 

 blunted by wear. The uuder surface of the jaw exhibits a 

 deep angular cavity extending from the posterior end to about 

 two-thirds of its length; the front portion is arched över. 

 The examples are abundant. A large specimen is 2 mm. in 

 length; an average specimen measures 1,3 by 0,4 7 mm. 

 This jaw is similar to forms from the Cincinnati series of 

 Toronto, and the English Wenlock, which, judging from the 

 under surface of the specimens, I had placed under Eunicites^ 

 but these perfectly free Gotland specimens appear to resemble 

 closer the jaws of the existing Oenone. 

 Locality. Wisby. 



(Enonites uaviformis, Hinde. Pl. 2, figs. 25 — 30. 



1880. Oenonites naviformis, Hinde. Quart. Jour. Geol. Soc. Vol. 

 36 p. 372. Pl. 14 f. 3. 



Jaw oblong or somewhat triangulär in outline, depressed in 

 the centre ; the anterior margin slightly incurved and terminating 

 in a prominent, pointed, conical tooth, which is more or less 

 oblique to the jaw-plate; the front part of the outer lateral 

 margin is rounded, in the centre is a small blunted process 

 and then the margin tapers to the obtuse or truncate posterior 

 extremity. The inner or free lateral margin is straight or 

 slightly arched, and carries a series of small denticles, 10 to 

 13 in number. The under surface of the jaw is similar to 

 that of Oe. major, and has a deep furrow extending for two- 

 thirds of its length, whilst the front portion is arched över. 

 The forms are all minute and vary between 0,4 7 and 0,7 6 

 mm. in length and about 0,2 mm. in width. 



Locality. Wisby. 



(Enonites curvidens, Hinde. Plate 2, figs. 31, 32. 

 1879. Oenonites curvidens, Hinde. Quart. Jour. Geol. Soc. Vol. 35 

 p. 376. Pl. 18 f. 7. 



Jaw triangulär in outline ; upper surface slightly concave, 

 the anterior margin incurved and with a sharply pointed con- 

 ical tooth oblique to the jaw plate. The outer lateral margin 

 is curved in front; in the central portion is an inflated, ob- 

 liquely directed, process; posterior to this the margin has an 

 open curve, and then becomes nearly straight to the obtuse 

 extremity of the jaw. The free lateral margin is nearly straight 

 and carries about 14 conical denticles. Length 0,8; width 



