Page 5. 
# 
ERRATA AND ADDENDA. 
EXPLANATION OF THE PLATES. 
Immediately over Dictyonema, Hyprozoa or Poryzoa should be inserted. 
,, 14. Line 10, for pl. 1, read Part 1. 
,, 21, Immediately over Ribeiria Crustacea should be inserted. 
29 
22. 
Line 17, HerEropopa or should be inserted before Preroropa. 
Line 10 from bottom, immediately aboye Theca should be inserted 
PTEROPODA. 
. Line 6 from bottom, and p. xxvi. “ Descriptive Remarks,” before Petraia, 
which should be bracketed, Cyathophyllwm may be inserted. 
. Line 1, for Asteriadé read Asteroidea. 
Line 16, over Protaster insert Ophiuroidea. 
. Line 15 from bottom, for Pal@ontological read Paleozoic. 
” 66. 
Insert at end of Description of fig. 5, as follows :—CEruALoropa. 
Fig. 4.—OrTHOCERAS ANNULATUM, Sowerby. 
Page 76 
oe 
ee 
bB ] 33 
” 
dv 
bel ” 
» 84 
2 ? 
” ” 
ey, 
” ” 
mo ab 
5} POLL 
ee 
O. undulatum, Hisinger, var O. fimbriatum, Sowerby. 
O. annulatum, Sil. Syst., p. 632, Pl. ix., fig. 5. 
From Sil. Syst. op. cit. Wenlock limestone, near Malvern. 
Carapoc to Wentock.—Sil. 4th ed., p. 535. 
Found at numerous localities in Wales; Shropshire; also in Wenlock 
rocks at Doonquin, Co. Kerry. Coll. G. 8. I. 
. Line 8 from bottom, for cymbaformis read cymbeformis. 
. Line 4, for Loxonoma read Loxonema. 
. Line 12 from bottom, for Orchus read Onchus. 
Line 4, erase “ probably portions of the jaws and tecth of a small ganoid 
Jish,” and insert ‘“ this and the following species are now determined 
to be processes of the carapace of a Crustacean.” 
. Line 1, for pustiliferus read pustuliferus. 
Line 7. for Theolodus read Thelodus. 
. Line 8, for Brorgniart read Brongniart. 
Under line 16, insert: ‘This species is also said to occur in the South 
of Scotland with the fossil fish Holoptychius nobillisimus.” Sil. 
4th ed., p. 248. Berwickshire, Jedburgh. Brit. Assoc. Rep. (Aber- 
deen). 
Line 18, bracket Knorria, and insert Sagenaria before it. 
Line 12 from bottom, after Cyclostigma minuta, Haughton, insert* 
* Journ. Roy. Dub. Soc., pp. 419, 420, Lepidodendron minutum, 
Journ. Geol. Soc., Dub. Vol. vi., p. 235. Loc. Tallow Bridge, 
Co. Waterford. 
2. Line 1, erase a, commencement of paragraph. 
Line 138, after septe, insert ), transverse section. 
3. Line 6 from bottom, for Swwerbii read Sowerbii. 
5. Line 12, for creos read cross. 
7. Line 12, for Rutherglens read Rutherglen. 
Pnnted by M‘Glashan & Gill, 50, Upper Sackvillc-street, Dublin. 
