17 



Loven, on pi. ii, fig. 3a-c, represents three copies of C. 

 bellatulus ; fig. 3a has the first three thorax segments 

 facetted, and fig. 3c, the first to fourth. From these 

 figures we would judge that the first 5 thorax segments 

 had distinct fulcral points, which consisted of an attach- 

 ed articulated extremity. The pygidium is triangular 

 and has a conical axis, which consists of 16 to 18 notches; 

 only the first 4 or 5 axis joints have pleurae. The type 

 for this sub-genus is Cybele bellatulus, Dalra. 



Sub-genus III. Atractopyg^, Corda, 1847. 



Cephalic shield semiluna, with the posterior angles al- 

 most produced into short spines. Glabella clavate, with 

 a wide anterior lobe ; the eyes are situated in the centre 

 of the cheeks; if an imaginary circle be drawn, with its 

 central point in the middle of the occipital ring, and if J 

 its diameter be equal to the length of the glabella, on 

 the median line, it will cut the eyes at their base. The 

 posterior branches of the facial sutures commence on 

 the outer margin, near the lateral posterior angles of the 

 cheeks. The thorax has 11 segments; the pleurae are 

 posteriorly bent,^nd have pointed extremities, with a 

 central row of tubercles. The pygidium has a double 

 row of tubercles on each side of the axis and four pleu- 

 r£B ; the first, second and third are twice the width of the 

 axis joints ; fourth is three times the width. The type 

 for this sub-genus is Calymene verrucosa, Dalm. 



Loven's copy of this species, figured on pi. i, fig. 5f, 

 does not represent the dorsal furrows, which divide the 

 axis from the segments ; therefore, Corda, who copies 

 this figure for the type of his genus, remarks : "the py- 



