468 
THE GEOLOGIST. 
17. „ EEEDii, Dav., pi. v., fig. 40— 47. 
18. „ TRiRADiALis, Phillips, Geol. York, pi. s.,fig 7: and Dav., pi. ix., 
fig. 4 — 12. = trisulcosa and acxradiales, Phillips. 
19. „ PINCCI3, Sow., M.C., tab. cclxxi., 1820: and Dav., pi. x., fig. 
1 — 12 = rotumlata. Sow. (not Martin) = subrotundata, 
M'Coy. I should have preferred adopting Sowerby's 
name, roturulata, for the species ; but, as that name had 
already been employed for another species, I felt com- 
pelled to adopt that of pinguia for the species. The form 
rolundalus is ihG normal condition of the species; thevar. 
pinguis is composed of shells that have been either stinted 
in their development, or are monstniosities. 
20. „ ovALis, Phillips, Geol. of York, pi. x., fig 5 : and Dav., pi. ix., 
figs. 20 — 26 = exarata, Fleming (?) = hemisplmrica, 
M'Coy. 
21. „ rNTE&iMCosTA, Phillips, Geol. of York, pi. X., fig. 2 : Dav.,pl. ix., 
figs. \Z — 1^1 = rotundata, Martin 'l=2}a}(cicostata ? M'Coy. 
N.B. — The species composing this little group are all 
very nearly connected, indeed, it is at times very difficult 
to distinguish some of the varieties of the three last 
named one from another, although the generality of 
specimens appear to be tolerably distinct. 
'22. „ EHOMEOiDALis, M'Coy, Synopsis, pi. xxii., fig. 11, 18-14 : and 
Dav., pi. xii., fig. G, 7. 
23. „ GLABEA, Martin, Pet. Derb., pi. xlviii., 9, 10, 1809 : and Dav., 
pi. xi., figs. 1 — 9, and pi. xii., fig. 1 — 5 = obtusa and 
ohlata, Sow. = linguifera, symmetrica, and decora, Phillips. 
The varieties presented by this species are endless, so 
that one can hardly discover a single permanent dis- 
tinguishing character. 
24. „ TJEII, Fleming, Brit. Animals, p. 376, 1828 : and Dav., pi. xii., 
fig. 13, 14. 
V25. „ OAELTTKiENSis, Dav. pi. xiii., fig. 14, 1857. 
' 26. „ LiNEATA, Martin, Pet. Derb. tab. xxxvi., fig. 3, 1809 : and Dav., 
pi. xiii., fig. 1 — 13. = imbricata, Sow. = reticulata, 
M'Coy = clliptica and mesoloba, Phillips. Some authors 
consider <S^;. elliplica and.S^. lineata as specifically distinct. 
27. Spiriferina ceistata, Schl. vav octoplicata. Sow., M.C, tab. ixii., fig. 
2- 4, 1827 : Dav., pi. vii., figs. 37-47. 
28. ? INSCDLPTA, Phillips, Geol. York, pi. ix., fig. 2, 3, 1836 : Dav., pi. 
vii., fig. 48, 55 = crisjM, De Koninck (not of Linnoeus) 
= quinqiieloba, M'Coy. 
? 29. ■ f MINIMA, Sowerby, M.C, tab. ccclxxvii:, fig. 1, 1822 : and Dav., 
pi. vii., figs. 56 — 59. I have never seen more than 
Sowerby's own two examples of this shell, and I consider 
it to be an uncertain species, as well as the iS^. partita of 
Portlock, which is probably nothing more than a synonym 
of one of those above-mentioned. 
( 30. Ctrtina SEPT03A, Phillips, Geol. of York, pi. xi., fig. 7, 183G : Dav., pi. xiv., 
fig. 1 — 10, and pi. XV., fig. 1, 2. This is a very in- 
teresting species, but rarely found with the two valves 
united. Some of the interior details of the smaller 
valve are still unknown. 
31. „ doesata, M'Coy, Synopsis, pi. xxii , fig. 14, 1844 : and Dav., pi. 
XV., fig. 3, 4. I consider this to be among the uncertain 
species, only two or three imperfect specimens having 
been hitherto discovered. 
32. OAEBONAEiA, M'Coy, British Palaeozoic Fossils, pi. iii., n., fig. 
12-18, 1855: and Dav., pi. xv., fig. 5-14. 
