NATURAL SCIENCES OF PHILADELPHIA. 243 
p. 180, line 13, for 5 read 8. 
p. 191, line 5 from bottom, for Colkett read Calkins. 
p- 165, line.19, Z. cerinotdews, Jaw as usual. Teeth 34—1—34, with 9 perfect 
laterals. Charleston, S. C. (W. G. Masyck.) 
p- 171. Note. Z. ceriznordeus also has these characteristics of Zonztes. 
p. 176, line 15, add: excepting in the absence of the peculiar inner side cutting 
point of that species. 
p. 186. Coecilianella. Since the above was printed, I have had an opportunity, 
thanks to Mr. Bland, of examining the jaw and lingual membrane of C. Gundlachi 
of St. Martin. The jaw has decided, numerous, broad, flat, slightly separated ribs, 
denticulating either margin. 
In the plates the inner cutting aoine should have been bifid in pl. X. fig. 1, 16th 
tooth. (The fourth figure from the right is the 10th tooth.) Fig. 8, d. Pl. XI. fig. 
1, 6. Pl. XII. fig. 1, 31st tooth. 
Heliz ruficincta, pl. XIV. fig. 3. Another membrane has cutting points on all the 
laterals. 
Heliz exoleta. Two of four membranes recently examined have side cutting points 
to outer laterals; the inner cutting point of marginals are also bifid. 
