ADDITIONS AND CORRECTIONS. 357 



slightly above it, as in the embryos of most species of this 

 genus. The embryonic whorls are slightly convex, but they 

 do not project mucro-like. The specimen figured measures, 

 alt. 6.3, diam. 9 mm. 



The reference to figures of P. heliciformis on p. 127 should 

 read " PI. 36, figs. 1, 2, 3." 



P. 162. Upper third of page, for " Series of A. variegata " 

 read Series of A. reticulata. A similar correction is to be 

 made on the following page, and on the 14th line from bottom 

 of p. 158. On p. 162, the paragraph beginning * * This Oahuan 

 group " should follow the diagnosis of Metamastra. 



P. 226. After A. porphyrostoma read PI. 37, figs. 8, 9, 13. 



P. 227. Line 10, read Fig. 13 in place of Fig. 12. 



Line 12 from bottom read 8, 9 in place of 8, 13. 



