CONCHIFERA. 
CAMBRIAN AND SILURIAN. 
PAL.ZOZOIC. 
CAMBRIAN. LOWER SIL. UPPER SILURIAN. 
‘E| | & Sls/2|Els|2/slelels 
&|l2|.| | JEslsieelasilsié 
SPECIES. slalels| |S|clelslallaleiglel. REFERENCES 
aye ele [Ss lol ale ls lSlslglslele 
TISIASI4 ASAE ISiapisis 
Sub-Kingdom, MOLLUSCA. 
| Class, PELECYPODA 
Group, Monomy arta. 
AVICULIDE. 
Ambonychia ...... Hall, 1843 ASIPHONIDA. 
— tumida............ RST cca eeac cos 005 [cad esa foe bod ee * Sil. District of Rhymney, Q. J. Geol. Soc. vol. xxxv, p. 497; 
t. 24, f. 9. 
. AVICULIDE. 
Bierinwesa ........0:-- Goldfuss, 1832 ASIPHONIDA. 
— posidonieformis M‘Coy .........|++|...|...Jeeefeeefece|..clecefeee sles tc Synop. Sil. Foss. Ireland, p. 22, t. 2, f. 10. 
Group, Drmryarta. 
SoLENIDz. 
Cultellus......... Schumacher, 1860 SIPHONIDA. 
SeeeCECUUSHeeetenwesen: Salter,.......+... Pod eae] Seo Iood face lee ee lel ee * Ceratosolen, Ann. Mag. Nat. Hist. 3 ser. vol. v, p. 1593 
ib. Sedgwick’s Kendal Foss. Wordsworth’s Letters on the 
Lakes, 1843-46 (Appendix), ? Solen rectus. 
NUcvLipz. 
Theda 22.5 .cscceees. Schumacher, 1817 SIPHONIDA, 
— ambigua ......... INES) ceeccoree| cod lace [os acl Hac loo boca Keo ee * Sil. District of Rhymney, Q. J. Geol. Soc. vol. xxxv, p. 497, 
t. 24, f. 7. 
MyTILipz. 
Modiolopsis ...... Hall, 1847.,.... ASIPHONIDA. 
— acutipora......... ISOTIED) Gescetace ler lnca oo4 leo] Koc [aaa ood bod [ace lece elicka|lees| [eee one tesla Sil. District of Rhymney, Q. J. Geol. Soc. vol. xxxv, p. 496, 
ti24y tea Zils 22. 
— inflata 1.0.0... ee 3 eee hel ead Meee Sil. District of Rhymney, Q. J. Geol. Soc. vol. xxxv. p. 496, 
— var. eleyata ..... Sollas t. 24, f. 2. 
MyTiLip». 
Orthonota Conrad, 1838 ASIPHONIDA. 
ATTY rosecee G (SILI Benes ood loo loool act IGollbeot cel oct Laos 5 FA (oe eed Deel Paar Sil. District of Rhymney, Q. J. Geol. Soc. vol. xxxv, p. 496, 
t. 24, f. 3. 
3H 
417 
