^6 JOHAN KIÆR. M.-N. Kl. 



larly the 2nd.). In well-preserved glabellae the 3rd is clearly broken oft" 

 in the middle. The 4th pair of furrows extend inwards still less than the 

 3rd, and even appear to branch off into two, so that thereby the outer 

 parts of the 4th lobe sometimes appear as faintly limited elevations. 



The Eyes are very long and curved. The length is usually about 

 the same as the distance from the posterior margin to the ist furrow. In 

 some cases, however, it is less. There appear to be a long- eyed and a 

 short-eyed form. (See e.g. pi. IX, fig. 2—3 and pi. XI, fig. i). 



The palpebral lobes thus become very large and broad, and almost 

 flat; only the outermost part (the eye-brim) appears distinctly raised. The eye 

 brim is thereby very long and narrow, and divided by a fine furrow into 

 two parts. The outer one extends along the upper margin of the eye and 

 is about as long as the latter; it increases somewhat in breadth behind. 

 The inner part is quite narrow, increasing somewhat in breadth anteriorly, 

 running in a faint arc into the frontal lobe with which it unites without 

 limitation. 



The posterior part of the eye-brim in the large eyed specimens is situated 

 just outside the middle of the occipital ring; in small eyed specimens out- 

 side the 4th turrow. The distance from the posterior margin thus varies 

 greatly. 



From the 4th furrow we see a faint, raised rib running obliqueh' out 

 towards the intergenal angle. 



As a rule, before this intergenal rib we see another faint rib that 

 commences at the posterior edge of the eye and runs in a slight curve 

 obliquely outwards. It disappears before reaching the margin. It seems 

 that this fine rib must be regarded as an obliterated facial suture. 



As the anterior part of this suture we must regard a faintly impressed 

 furrow which extends backwards from the anterior edge of the eye in an 

 arc- until outside the eye it unites with the marginal furrow. 



On the un de rs ide of the cran i di um the shell bends over in a doub- 

 lure which is e.\tremely narrow in front but increases in breadth posteriorly. 

 Inside the genal spines it is especially broad and bends in a broad curve, 

 passing into a doublure along the posterior margin that narrows inwardh*. The 

 hypostome with its long hypostome attachments is fastened to this doublure 

 by a distinct suture. (See text figure 13). 



The hypostome is almost always greatly compressed and deformed; 

 on Several cranidia, however, it could be prepared. It is very broad ; 

 The anterior section is almost circular, and slightly arched in pressed 

 specimens; it extends along the sides without limitation into the broad 



