ADDITIONS AND CORRECTIONS 551 
Acmea grandis, Gray, found at Monterey by Col. Jewett 
and Mr. Hartweg. It appears abundantly in the 8.’ W. 
Mexican Col. but was not found either by Mr. Nuttall or 
M. Reigen. Dele also the corresponding reference under 
Hab. (page 200) “‘ Monterey...... Nutt.)” 
Page 203, line 22, add “(Non Rve. Conch. Ic. pl. 16, sp. 38, 
1854.)” 
Page 207, line9 from bottom. D’Orbigny’s types in the Br. 
Mus. appear exactly conspecific with the Californian shells. 
Page 208, line 2, for “2+” read “=.” Add to the sentence, 
“teste Reeve: ‘never took it,’ teste Cuming: Monterey, 
Hartweg, teste Mus. Cuming.” 
After tablet 1020, add **1020 bis, 1 sp. with 6 corners.” 
Page 215, last line, add ‘‘ Chén. Conch. Til. pl. 1, f. 25, a, 6.” 
» 216, last line (text,) for “13” read “13.” 
Page 220, line 9 from bottom, add “Chén. Conch. Ill. pl. 1, 
f. 23,24.” Fo the synonyms should be added ‘‘? + Fissurella 
mus, Ive. Conch. Ic. pl. 16, f. 120. Hab. P——” 
Page 227, line 17, to Val. Voy. Ven. add “‘pl. 2, f. 3, 3 a-c.” 
To tablet 1095, add “Most of the above possess opercula ; 
tablet 1095* contains 6 opercula loose.” 
Page 229, line 2. from hottom, add “‘ Rev. Soc. Cuv.1839, p. 361.” 
» 229, last line, add “pl. 2, f. 2,24.” 
», 280, note, line 2, to “Voy. Ven.” add ‘pl. 3 f.1, 1 a-e.” 
» 282, line 1, for “Comp.” read “=,” from type. 
To tablet 1125, add “one with operculum.” 
Page 235, line 3, dele “*?” from type. 
To species 329, add the following note* :— 
_ * An extremely similar species, with the colour-markings preserved, is found 
in the Lias of N. Germany ; Neritina Liasina, Dkr. in Zeit. f, Mal. 1844, p. 188. 
Page 263, line 5, for “has” read ‘‘had”’. 
Tablet 1425. The specimen recorded proves to be somewhat 
less elongated than that on tablet 1424. Another specimen 
is therefore substituted, intermediate in shape, finely striated. 
longitudinally, with crowded ridges of growth. 
After tablet 1445, add “‘1445*, 2 sp. extremely young, of which 
one may have developed into C. imbricatum.” 
Tablet 1516, add “+a young shell which may belong to the 
species.” 
