378 



Miscellanies. 



deficient between extinct and existing forms, and to confirm the gen- 

 erally entertained belief, that the trilobite race were true analogues of 

 the Crustacea. This genus embraces two species already found, one 

 at Springfield last summer, the other near this city, by J. G. Anthony, 

 on the first of April. . 



Generic characters. 



Body, contractile ? 



Head, full, lobate, irregular, tuberculated, and furnished with two 

 antennae or horns, projecting forward beyond the buckler, based be- 

 tween the termination of the front and the margin of the lip ; between 

 them there is a central eminence on the mesial line. 



Front, prominent. 



Cheeks, extending on each side so as to form large spherical trian- 

 gles, separated from the front by deep sulci, in which are placed ocu- 

 liform processes, (three in number?) 



Abdomen and tail, deficient in our specimens. 



Species, Ceratocephala goniata. 



Clypeo antice angulare, convexo, punctato; tiiberculis oculiformi- 

 bus eminentissimis et triplicibus ; cornibus prorsum expansibus. 



The head of this species presents 

 the outward figure of half an irregular 

 decagon, full, nearly semi-cylindrical 

 in its transverse diameter, furnished 

 with two antennse projecting forward ; 

 they originate between the front and 

 lip, nearly opposite the sulcus, be- 

 tween the front and cheeks ; they are 

 broad at the base, and extend two 

 lines to the place where they are bro- 

 ken off*: between these and the front 

 there is a raised point half a line high, 

 on the mesial line, covered with tubercles precisely like those of the 

 Calymene Phlyctanoides. Lip raised, and semi-circular anteriorly, 

 but extended laterally by angular projections from the cheek. Three 

 oculiform processes occupy the spaces between the front and cheeks ; 

 the upper and lower pairs most prominent, and have deep pits beside 

 them. Front, prominent. Cheeks, extending on each side so as to 

 form large irregular triangles, are ornamented laterally by a projec- 

 tion, supporting the angles of the lip, giving the whole buckler its 

 very irregular form. Near the centre of each cheek there is a promi- 

 nence half a line high, apparently broken off"; these are connected by 

 a raised line sweeping back around the posterior extremity of the 

 front. 



