ON FOSSIL TOLYZOA. 203 



Family VII. Busk. Group Libera. 

 Selenabims, Busk, 1853 = Escharidce, (pars) D'Orb ; Voltjpiers foraminte, 

 Lamk. ; Cellcvricea, (pars) Blainv. ; MUleporees, (para) Lamx. ; Astero- 

 discina, Lonsd. — Dixon, ' Geo. of Sussex.' 

 ' Zoarium free (?), orbicular or irregular, conical, or depressed, convex 

 on one side, and plane or concave on the other ; composed of a single 

 layer of cells, usually of two kinds, which open on the convex surface 

 onlv.' — ' Crag Polyzoa,' p. 78. 



This family Mr. Busk comments upon very fully in the above work, 

 and as he has had many more facilities of studying the group than I can 

 ever hope to have, I gladly refer the student to the pages of the ' Crag 

 Polyzoa' for the general remarks. The following is the synopsis _ of 

 genera and also a full list of known fossil species below the Crag, which 

 will be, I feel confident, acceptable to students who have not access to the 

 author's works. 



Synopsis of genera (four admitted). 



1. Cupularia, Lanix. 



(a) Each cell with a vibracular chamber at its apex or distal 

 extremity. 



2. Lunulites, Lamx. 



(h) The cells and vibracular chambers disposed or separate, 

 usually alternate rows radiating from the centre. 



3. Selenarta, Busk. 



(f) Certain of the cells of a different conformation to the rest, 

 furnished with a vibraculum. 

 Stichopora, Hagenow. 



(d) No apparent vibracular chambers distinct from the true 



cell. 



4. CONESCHAREI.LINA, D'Orb. 



(e) Vibracula replaced by small avicularia; mouth of cell 



circular. 



Cretaceous genera and species. 



Selenaeia conica, D'Orb. = Lunulites ibid. Defr. 

 Stichopoka clypeata, Hagenow. 



Cl'Pl'LARIA MUNSTEBI, 





LUNULITES PLANA, D'Orb. 

 „ ROSACEA, „ 



„ PETALOIDES, D'Orb. 



„ REGIJLAEIS, „ 



„ PAPTRACEA, „ 



„ TUBERCCLATA, „ 



„ cretacea (? Defrance) 

 (? D'Orb). 



LUNULITES BOURGEOISII, D'Orb. 

 „ DOMA, „ 



,, CLTPEIFORMIS, „ 



,, HAGENOWi, Bosquet. 

 ,, Gqldfussi, Hagenow. 

 jiitra, „ 



„ SEllILVXARIS, ,, 



,, spiralis, „ 



Eocene. 

 Cupclarlv rhojiboidalis, Miinster. 



„ Haidingeri, Reuss. 



LUNULITES UECEOLATA, Lamk. 



(nonGoldf., Lamx.). 

 „ RADIATA, „ 



Lunulites contigua, Lonsdale. 



,, DISTANS, „ 



„ SEXANGLLA, „ 



