BIHANG TILL K. SV. VET.-AKAD. HANDL. BAKD, 7. N:0 5. 13 



eqiial, and vary iu difFereut specimeDS between 0,2 and 0,5 

 mm. The forms are rare. 



Locality. Wisby and Fröjel. 



Genus CENOXITES, Hinde. 



(Enonites aspersus, Hinde. Pl. 1, figs. 21, 22, 22a. 

 1880. Oenonites aspersus, Hinde. Quart. Jour. Geol. Soc. Vol. 36 

 p. 373. Pl. 14 figs. 7, 8. 



The jaw plate is rudely oblong, flat or slightly coucave 

 on the free surface, with a prominent conical tooth in front, 

 which is more or less oblique to the plane of the jaw plate. 

 The posterior extremity is obliquely truncate with a spoon- 

 shaped central depression aiid a small lateral flange. The 

 outer lateral margin is curved in front and then becomes 

 nearly straight. The inner or free lateral margin is nearly 

 straight, and its edge carries a closely set series of minute 

 pointed crenulations, occasionally the anterior two or three 

 are somewhat larger than the rest of the series. The under 

 surface is convex and there is an elongated aperture near 

 the posterior end for the iusertion of the muscle. The jaw 

 appears to be completely hollow quite to the base of the 

 front tooth. A large specimen is 1,8 1 by 0,5 4 mm. and the 

 smaller examples are about half the dimensions of the larger. 

 The speciraens are numerous, and they closely correspond 

 with the forms from the Enorlish Wenlock and Ludlow beds, 

 but in these latter, the posterior flange appears to have been 

 broken off". 



Locality. Wisby and Fröjel. 



(Enonites major, Hinde. Plate 1, figs. 23, 24. 

 1879. Eunicites major, Hinde. Quart. Jour. Geol. Soc. Vol. 35 p. 

 374. Pl. 18 f. 1. 



Jaw oblong to triangulär in outline, widest in the central 

 portion; tho upper or free surface concave, the anterior extre- 

 mity incurved and terminating with a prominent curved hook, 

 the posterior extremity obtuse, the outer lateral margin some- 

 what inflated, curved anteriorly; a slight jutting out elbow 

 in the centre from which the margin extends nearly straight 

 to the posterior end. The free lateral margin is nearly straight, 

 and is provided with a series of stout triangulär denticles, 



