84 THE CRAG POLYZOA. 



recent species is Lunuliies radiata, or some of the forms figured under that title. Among the 

 representations of this species are some which bear a strong resemblance to L. cajjulus, B., 

 though of far smaller dimensions. 



SYNOPSIS OF GENERA. 



(a) Each cell with a vibracular chamher at its apex or distal extremity. 



1 . CUPULARTA, Lamx. 



(6) The cells and vibracular chambers disposed in separate, usually alternate rows, 

 radiating from the centre. 



2. LUNULITES, Lamx. 



(c) Certain of the cells of a different conformation to the rest, furnished with a 

 vibraculum. 



3. SELENARIA, Bust. 



(d) No apparent vibracular chambers distinct from the true cell. 



STICHOPORA, Hagenow. 



(e) Vibracula replaced by small avicularia ; mouth of cull circular. 



4. CoNESCHARELLIKA, D'Orbiyny. 



Of these four genera, two only are represented in the Crag fossils. 



