24 CATALOGUE OF TYPES AND FIGURED SPECIMENS 



Two specimens showing body segments only, figured by 

 Dr. Woodward. 

 Carrig-Felyn. 

 Lingula Flags. Coll. Homfray. 



Cyclus Scotti, sp. nov.^'- 



A Dorsal aspect of carapace ; 

 natural size. 



B Left postero-lateral margin, 

 magnified to show ornamentation. 



Type. — Shield, or carapace, nearly circular in outline, 

 bilaterally symmetrical (25 mm. broad by 20 mm. long), 

 having a well-marked median ridge dividing the carapace 

 in half for 8 mm. from the posterior border ; posterior 

 margin slightly indented or notched in the centre ; the 

 lateral and posterior margins of the shield encircled by a 

 smooth raised rim, which stops short at the antero-lateral 

 margin (which is slightly compressed where the rim ter- 

 minates), the shield being truncated for a breadth of 12 mm. 

 in front. There is evidence on the right side of a slight 

 extension of the smooth margin of the shield outside the 

 raised rim ; anteriorly the shield is ornamented by four 

 nearly equal oval prominences, each being about 5 mm. 

 long, placed two on either side of the central line,f with 

 their longer axis directed towards the front of the shield; a 

 well-marked, smooth, semicircular ridge occupies the centre 

 of each lateral area, and unites with the raised median 

 ridge near the posterior border of the shield. The area 

 enclosed between the outer and median ridges becomes 



- The description and notes are from the pen of Dr. H. Woodward, F.R.S. 

 t The two inner oval prominences have been largely cut away in an 

 injudicious attempt to develop the anterior part of carapace. 



