208 GASTROCOPTA. 



heaviest of all, reaching nearly to the aperture; angulo 

 parietal spur united to the parietal in the type, bending out- 

 wardly toward the aperture and merging into the posterior 

 peristome (in the para type figured and other specimens the 

 angulo-parietal is separated from the parietal by a space). 

 Altitude 2.01 mm., diameter .81 mm." (Hanna). 



Montserrate Island, Gulf of California (J. C. Chamberlin). 

 Type, No. 1094 Cal. Acad. Sci. 



Gastrocopta rixfordi Hanna, Proc. Cal. Acad. Sci. (4), xii, 

 art. 26, p. 515, pi. 10, figs. 5-8. 



"In the occasional separation of the angulo-parietal tooth 

 from the parietal, this species resembles the genus Sterkia 

 where it is normally separated. Part of the type lots of each 

 of the West American species of the genus, calamitosa, Clemen- 

 tina and hemphilli are in the collection of the California 

 Academy of Sciences and the possibility of their having orig- 

 inated from some such ancestral stock as G. rixfordi is sug- 

 gested. On account of the color of the latter and the usual 

 tooth arrangement (as in the type) the species is placed in 

 the section Albinula. The shape of the whorl back of the 

 aperture is strongly suggestive of the condition in G. armifera 

 and G. contracta. 



"The species is named for Dr. Emmet Rixford of San 

 Francisco, California" (Hanna). 



I have not seen specimens of this species; its generic posi- 

 tion appears somewhat uncertain. 



Vol. XXIV, page 95. 12th line from bottom : For PL 28, 

 figs. 1, 2, Ecuador, and pi. 28, fig. 3, Duran, read : PI. 28, figs. 

 2, 3, Ecuador, and pi. 28, fig. 1, Duran. 



Page 124. Pupa annobonensis Girard has been figured by 

 Germain, Ann. Mus. Civ. Stor. Nat. Giacomo Doria, Genova, 

 (3), vii (xlvii), 1916, p. 236, pi. 6, f. 17, 18, but the figures 

 are too indistinct to make their reproduction here worth while. 

 It is said to be closely related to P. nobrei Girard, of San 

 Thome. 



Page 128. Gastrocopta seignaciana (C. et F.). This is 

 probably "Pupa leignaciana Cross., Cayenne" of Paetel's 

 terrible Catalog, 1883, p. 159. 



