Plate III. 

 Extei'nal appearance of Teras XV. 

 Koof of the cranium removed and the beads denuded. Body opened and 

 spread out. 



a.. Left ear of component A ; b., Rigbt ear of component B ; c, Rigbt eye 

 of B; d., Left eye of A; 1., Larynx of A; 1'., Larynx of B; t, Trachea com- 

 mon to both components. 



