Type-specimens of Pcecilasma carina turn, 



103 



concentrically striated (fig. 1, B). Tergum (fig. 1, A) with 

 carina] margin rather less than half as long a- occludent 

 margin ami inclined towards it above. Carina (fig. 1, A, C) 

 evenly arcuate, upper portion narrow, its transverse width 

 above not more than one-twelfth of the length of the valve ; 

 sides expanded in the lower thirl ; septum concave, the 



Fig. 1 



Megalasma [Glyptelasma) carinatum (Hoek), holotvpe. 



A. Valves of the capitulum, lateral view. B. Basal angle of scutum, 

 inuer surface. C. Carina, inner surface." 



lateral lobes projecting as seen from the side ; basal margin 

 forming a slightly convex curve with that of the scutum 

 when the valves are in their natural position and viewed 

 from the side. 



Dorsal surface of prosoma provided with long Jiinnentary 

 appendage* arranged in two series (cf. fig. 3). The exact 



27* 



