R. Tate — Census of the Lias Invertebrata. 



the three members of the Lias is represented in the following 

 table : — • 









c 







3 "^ 



u 



P< 





Hi 



s 



p 





h 



A S 



t) 



Beloteuthis 





. 



X 



Terebratulina . 



3 



X 





Teudopsis . 











. 



X 



Stomatopora . 









3 



. 





Xiphoteuthis 











X 



. 



Neuropora 









3 



X 





Bulla . 











X 



. 



Froboscina . 









3 







Cryptcenia 









X 



X 



. 



SemimuUiclaus 



a . 







3 







Cryptolax . 











. 



X 



Lichenopora 









3 







£xelissa . 











X 



. 



Spiropora . 









. 



X 





Fileolus 











X 



. 



Magila. 









, 





X 



Purpurina 











X 



. 



Uncina . 









. 





X 



Functurella 











X 



. 



Megacheirus. 









3 







Onustus 











X 



X 



Scapheus . 









3 







Axitiopsis . 









X 



. 



. 



^ger . . 









3 







Cardinia 









X 



X 





Hefriga 













X 



Gresslya . 









. 



X 



X 



PolUcipes . 









3 







Sippopodium 









X 



X 



. 



Zoocapsa . 









f 







Isocardia . 











X 



. 



Holectypus 











X 





Limopsis . 











X 



, 



Heteroeidaris 













X 



Fholas 











. 



X 



Fygaster . 











X 





Spondylus . 











. 



X 



TTraster 











X 





Terquemia. 









X 



X 



. 



Tropidaster 











X 





Trigonia . 











X 



X 



Luidia . 











X 





Teredo . 











. 



X 



Plumaster 











X 





Venus . 











X 



. 



Astropecten 











X 





Leptcena . 











X 



X 



Cotyloderma 











X 





Megerlea . 











X 



. 



Microcrinus 











s: 





Suessia 











X 



. 



Oppelosmilia 











s: 





Terebratella . 











X 



. 



And most Con 



lis* 









X 





* The distribution of the Corals is the inverse of that of the Star-fishes. 

 DESCKIPTIONS OF NEW SPECIES : 



Gerithium Huttoni, nov. spec. — Shell small, turriculated, spire 

 acute, whorls six, angulated; penultimate whorl ornamented with four 

 very prominent obtuse encircling smooth ribs, the upper two smaller 

 than the lower ones, the superior one of the latter carinating the 

 whorl ; the lower half of the last whorl with a few smooth ribs ; 

 interspaces apparently smooth. Aperture subquadrate. Marlstone. 

 Dumbleton (Coll. Mrs. Hutton, nee Holland, to whom the species is 

 dedicated) . 



Ceritliium ligaturalis, nov. spec. — Shell cylindrical, turreted, 

 spire acute, whorls about 15, imbricating, ornamented with a broad 

 depressed band encircling the upper suture, and a narrow one around 

 the lower suture ; the carina at about the anterior third of each 

 whorl. Transverse striae oblique and distant ; last whorl with three 

 ribs below the keel. Base convex, smooth ; aperture elongated ; canal 

 obsolete. Allied to C. Sidce (D'Orb.) and C. Ihex (Tate). Marlstone. 

 Eed Mile, Lincolnshire. (Coll. Geol. Surv.) 



Gerithium Dayii, nov. spec. — Differs from 0. subreticulatum (D'Orb.), 

 in its excavated suture, fewer (4) longitudinal and transverse lines, 

 which produce denticulations rather than granulations, and from C. 



