230 APPENDIX, VOL. XXIV: GASTROCOPTA. 



aperture subquadrate, armed with a parietal lamella bearing 

 a small, internal, erect denticle towards the base of the outer 

 lip and an internal lamella on the columella; labrum white, 

 outwardly expanded, continuous. [PL 1, figs. 14, 15, 16.] 



"Alt. 1.75, diam. maj. .75 mm." (Preston). 



British East Africa: Gazi (type loc., Robin Kemp). Eusso 

 Nyiro River (Preston). 



Ennea insuLsa PRESTON, Proc. Zool. Soc. Lond., 1913, p. 

 205, pi. 33, f. 13, 13a. 



Specimens from Preston, no. 41564 Bryant Walker coll., 

 confirm the provisional reference to Gastrocopta made in vol. 

 xxiv, p. 359. The original figures are copied, pi. 1, figs. 14, 15. 



The sculpture and form agree with G. klunzingeri (Jick.) 

 of Abyssinia. In the specimens from Eusso Nyiro River (fig. 

 16) the angulo-parietal lamella does not show a spur on 

 the right side where the two lamellae join. This, however, is 

 shown in the figures of the typical form. Whether the two 

 specimens (one broken) from Eusso Nyiro represent another 

 race, or merely a mutation, cannot be determined from the 

 material at hand; but the typical form apparently does not 

 differ from Jickeli's species. 



GASTROCOPTA MOOREANA (E. A. Smith). PL 24, figs. 6, 7. 



Vol. XXIV, p. 160. Specimens of the original lot from 

 Roebuck Bay, Western Australia, received through the cour- 

 tesy of the British Museum, are now figured. 



The shell resembles O. larapmta in contour, but has a 

 special character in the sculpture as seen under the micro- 

 scope, the striae being made irregular, and in places inter- 

 rupted by malleation or shallow, uneven pitting, producing 

 sometimes a sort of reticulation, not unlike that of some Neso- 

 pupae (Indopupa) . The straight angular lamella joins the lip 

 weakly or scarcely. It does not connect with the parietal 

 lamella, which is high but not very long. The columellar 

 lamella is high on the columella, and ascends very slightly in- 

 ward, being nearly horizontal. There are two short palatal 

 folds, the lower being larger and somewhat more immersed. 

 No basal fold. Peristome reflected and thickened moderately 

 within. 



