212 Ammls of the South African Mnseuvi. 



The thorax is very flat and \vide, nine segments are shown. The 

 axis forms ahout one-third of the width ; pleurao very deeply grooved, 

 the hinder ridge being very prominent at its extremity ; ends of 

 plem-ae pointed. 



The tail is imperfect, hut was evidently much wider than long. 

 Axis very prominent, especially towards its extremity, nearly 

 parallel-sided ; the portion which remains shows six rings. The 

 lateral lobes show deep concave furrows separated by narrow ridges; 

 only four furrows ai'e visible. 



Localitij. — KeuiboonVs River, Knvsna (70). 



DALMANITES LUNATUS, sp. nov. 



Plate XXV., lig. r.. 



Head depressed, semicircular, genal angles produced into spines, 

 marginate. Glal:)ella widens considerably towards the front ; first 

 pair of glabellar furrows oblique, but very imperfectly shown on the 

 specimen ; second and third pairs deep and at right angles to the 

 axis. Eyes ver}' large, crescentic, occupying most of the free cheek, 

 almost touching the glabella at the first glabellar furrow and reaching 

 back nearly to the neck furrow. 



Thorax depressed. Axis less than one-third the width, widens up 

 to the fourth segment and then narrows again. Pleura; curved 

 somewhat backwards, grooved longitudinally. 



Of the tail only a portion of the axis is visible, showing ten 

 annulations. 



Localitij. — Gamka Poort (G6). 



DALMANITES, sp. 



Plate XXV., fig. 7. 



A portion of a DalnuDiitc-s tail from Ganika Poort shows numerous 

 ribs on the axis and also on the lateral lobe. The surface is finely 

 granulate. 



The rings on the axis are wide and flat, separated by narrow 

 grooves which are deep at the sides of the axis but become faint 

 and shallow medially. The ribs on the lateial lobes are also wide 

 and flat, and the intervening grooves deep and narrow ; tlie posterior 

 ribs curve outwards and backwards from the axis. 



