ERRATA. 
P. 510, line 3, for “vertical” read “ ventral” 
P. 514, line 13 from bottom, for “ Plate XIII. fig. 75” read “ Plate XII. fig. 75” 
P. 518, line 3 from bottom, for “80 e” read “81 e” 
P. 523. Transpose the paragraphs numbered 90 and 91, so that they shall be read thus :— 
90. Amphora complexa, n. sp., &e. &e. And 
91. Amphora fasciata, n. sp., &c. &e. 
Also same page, line 2, for “to which I now proceed,” read ‘to be presently de- 
scribed.” 
P. 531, line 22, for “‘Echmelleis’”’ read ‘“ Echinelleis” 
4 », 208, for “nonconcatenale” read “ nonconcatenata” 
5 », 23, for “utrusque” read “ utriusque” 
P. 539. In the Explanation of Plate XII., after —74, insert ‘‘—75...exigua, n. sp.” 
In the Explanation of Plate XIII., expunge the first item. 
Also, transpose the words opposite to — 90 and — 91, so that they shall be as 
follows : 
— 90. ... complexa, n. sp. 
— 91. ... fasciata, n. sp. 
And after — 91 insert 
— 92. ... suleata, Bréb. 
— 93. ... acuta, n. sp. Pack of united segments. 
In the Explanation of Plate XIV., for “Fig. 93” read “ Fig. 93” 6, and expunge the words 
of the second and third lines. 
The reader is requested to make, in the Explanations, as repeated opposite Plates XIL., 
XIII, and XIV., the corrections above indicated as required on page 539. 
