ON 1U«SII. rOLY/OA. 



20:) 



:Jtci'rtina, 



ig. /. 



l*'iiiiiily Vir. Busk. Group LUx'nr. 

 Sr;i.i:NAKlii.T:, Busk, Is.".:; = IJuc/nirihi; (pars) D'Orh; l\<lij}>li is jorttuiinri', 

 liiiiuk. ; Ciil((ii(fit, (piirs) IJlainv. ; J//7/«/j(/(vr(f, (pars) Laiiix. ; Ashri'. 

 (Usiuiut, Lonsd. — Dixon, 'Geo. (if Sussex.' 



* Zdiin'iim free (r ). orbicular or irrcj?ular, conical, or dcjirt'ssctl, convex 

 on ono side, and phiiie or concave on the otlier; composed of a sin<,'le 

 layer of cells, usually of two kinds, wbicli opon on the convex surfaci; 

 oidy.' — 'Crap Polyzoa,' p. 7K. 



This fannly Mr. Uusk {•oinmont-} upon very fully in tlio above work, 

 and as bo bas bad nuiny more lacilities of studying tbo proup than I can 

 ever bope to liave, 1 trladly refer tbo student to tbo ])ages of the ' Crat; 

 Polyzoa' for tbo prencral rernarks. Tbo following is tbe synopsis of 

 fjcnera and also a full list of known fossil species bolow tbe Crag, whieb 

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

 author's works. 



Syiuipsis of genera (four admitted). 



1. CupUiiAKiA, Lamx. 



((t) Each cell witli a vibracular chamber at its apox or disfnl 

 extremity. 



2. LiNi-MTKS, Lamx. 



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

 usually alternate rows radiating from the centre. 



3. Seij:xai!IA, Busk. 



('■) Certain of tbo cells of a dilTerent conformation to tbe rest, 



furnished with a vibraculum. 

 Stichoi'OEA, Hagcnow. 



((/) No apparent vibracular chambers distinct from the true 



coll. 



4. CoNi:sciiAREi.i.i\A, D'Orb. 



('•) Vibracuhi replaced by small avicularia; mouth of cell 

 circular. 



Ckktackols geuera and species. 



Selenauia comca, D'Orb. = !,/(» »/i7ej.- ibid. Defr. 

 Sticuoi'Oua cr.Yi'KATA, Hagenow. 

 Cl'I'I'lauia Ml nsteui, „ 



Llxuijtes plana, D'Orb. 

 rosacea, „ 



PKTALOIDES, D'Orb 

 EEGUI.AKl.'J, 

 I'APyKACEA, 

 TUnEliCL'I.ATA, 



CRETACEA (? Defrance) 

 (? D'Orb). 



EOCEXE, 

 CUPL'LARIA RIIOMIIOIDALIS, Mimster. 



„ Haidixgeri, Reuss. 



» 



n 



» 

 >» 

 »» 





LoxLLrn:,s Bolrgeoism, D'Orb. 



DOXIA, „ 



CIA'PEIFOR.MIS, „ 



Hagknowi, Bosquet. 

 GoLDi'issi, Hagenow. 



MITRA, „ 



SEMIIAN'ARIS, 



SPIRALIS, 



»> 

 >) 

 )> 

 )) 

 )) 

 II 





LUXI'LITES URCEOLATA, Lamk. 



(nonGoldf., Lamx.). 



>» 



EADIATA, 



LuNULiTES covfK^.rA, Lonsdale. 



,, DISTANS, „ 



»> 



SEXAXGULA, 



>l 



