B. Tate — Census of the Lias Invertehrata. 



9 



Acteon tessellatus, nov. spec. — Ovate elongated, whorls six, 

 convex, bluntly keeled at the suture ; last whorl ornamented with 

 about twenty narrow, equidistant, longitudinal sulci, and fine, close, 

 perpendicular striae, which produce a punctated appearance within 

 the sulci. Aperture oval. Total length, eleven-twentieths of an 

 inch. Differs from A. Broliensis (Buv.), chiefly in its ovate form. 

 Marlstone. Gratton, Gloucestershire. {Coll. Dr. Holl.) 



Opts Beslongchampsi, nov. sp. — Shell subtrigonal, ventricose, 

 somewhat compressed ; umbones anterior, acute, and subspiral ; 

 posterior side truncated, anterior rounded ; obliquely keeled posteriorly 

 and anteriorly. Ornamented by a few imbricating lamellae of growth, 

 and by numerous flat, transverse costae. Middle Lias. Gasteropod 

 bed; May! Marlstone ; TJley, Gloucestershire. (Coll. Geol. Surv.) 



CATALOGUE OF MAEINE TNVEETEBEATA OF THE LIAS.i 







No. Specs. 











No. Specs. 





Brit. 



Euro 





Brit. 

 2 



Euro 



TABLE I. 







Pitonillus 



4 



CLASS CEPHALOPODA. 







Pleurotomaria 







23 



67 



Ammonites ... 



128 



266 



Pterocera 







1 



2 



Belemnites ... 



57 



105 



Puncturella .. 













Nautilus 



9 



17 



Purpiirina . . 











1 



Sepiadce 



1 



11 



Pyrida 











1 



Xiphoteuthis 



1 



1 



Rimula 











1 



CLASS GASTEROPODA. 







Rotella 











1 



Acteonina 



12 



35 



Solaritim^ .. 









15 



31 



jUaria 





6 



21 



Stomatia 









• 



1 



Bullcc 







2 



Tectaria^ 









22 



40 



Capulus 

 Cerithium 





40 



2 



79 



Tornatella . . 

 Cinulia 









8 



14 

 1 



Chemnitzia 





19 



55 



Trochotoma .. 









1 



9 



Chiton 





.2 



3 



Troehus 









27 



79 



Cirrus 



Cryptvenia 



Cryptolax 





6 



1 



3 



16 



1 



Turbinella . . 

 Turbo 

 Turritella . . 









1 



31 



6 



1 

 59 

 26 



Dentalium 





8 



11 



CLASS CONCHIFERA. 







Mnarffinula 





3 



5 



Anatina ... ... 



5 



8 



Sydrobia 







1 



Anomia 









4 



8 



Ftisus 





3 



7 



Area... 









6 



13 



Exelissa 





1 



1 



Astarte 









14 



36 



Litorina 





2 



6 



Avicula 









21 



37 



Monodonta 





1 



1 



Axinopsis . . 









. 



1 



Natica 





5 



15 



Cardinia 









16 



49 



Neritina 





3 



4 



Cardita 









3 



6 



Neritopsis 





4 



11 



Cardium 









5 



11 



Niso ... 





3 



17 



Ceromya 









2 



3 



Onustus 





3 



5 



Conchodon '.. 











1 



Patella 





7 



12 



Corbis 









1 



2 



Phasianella 





3 



11 



Corbida 









. 



3 



Fileolus 







1 



Cucullcea 









13 



19 



^ MS. species are not included. 



^ Certain forms referred to this genus are Opereula Neritopsis, 



2 Including Discohelix and Slraparolus. 



^ Including Amberleya and Eucyclus. 



