1859.] 



SALTER PAEADOXrOES . 



553 



Bohemicus, &c., by the extraordinary width of the head, which is 

 9^ inches broad, and, so far as can be judged from the portions 

 remaining, fully as wide as the length of the entire body. Moreover 

 it is distinguished by the large expanded pendent ears at the pos- 

 terior angles, which are suddenly terminated by a short narrow 

 spine. The border is extremely broad, and marked with coarse 

 remote hneations, while the ridge that separates it from the rest of 

 the cheeks is very prominent. 



Fig. 1. — Outline-sketch of Paradoxides Bennettii (Salter), from 

 Newfoundland. (One- third of the natural size.) 



The lighter lines indicate the parts of the outline that have been restored. 



The axis of the broad thoracic segments is quite as wide as the 

 pleurae for the four or five front rings, and thence diminishes rapidly, 

 in proportion to the width of the pleurae, as far as the twelfth seg- 

 ment. We have only clear evidence of fifteen rings to the body ; 

 but in all probability there were seventeen, if not more. No caudal 

 shield is known. 



Although the axis is so broad, the pleurae bear about the same 

 proportion to it as in other species, and resemble those of P. spinosus, 

 Boeck. They have the usual strong groove crossing them obliquely, 

 and their ends are expanded, gently curved, and scarcely at all re- 

 flexed, — while those of the Bohemian species above referred to ar 



