LEPTACHATINA. 3 



" Smaller and more elongately ovate than the preceding" 

 [L. fragilis]. Var. ~b. Smaller, more solid, ovate conic, with 

 lip thickened (Gulick). 



Doubtless close to L. oryza Pfr., but the columella and 

 parietal callus are thin and the shell is imperforate. 



L. ORYZA (Pfeiffer). PL 10, figs. 1 to 9. 



Vol. XXI, p. 28, pi. 3, figs. 60, 61 (not 59). An error in 

 Vol. XXI to references to figures of this species and sub- 

 cylindracea would pretty effectually prevent their proper 

 identification. Figs. 60, 61, of Vol. XXI, are not quite typical, 

 being a little too conic. PL 10, fig. 1 is from the type in the 

 British Museum. 



The species is especially characteristic of the Pleistocene 

 and later beds in Oahu, found in many deposits in different 

 parts of the island. At about the same time, its close rela- 

 tives existed on other islands : antiqua in Kauai ; avus in 

 Molokai ; isthmica in Maui ; defunct a in Hawaii all now 

 extinct. 



L. oryza was sent to Pfeiffer by Frick, who certainly col- 

 lected on the northern coast of Oahu from Kahuku eastward, 

 as we know by the Bulimellas he obtained, among other things. 

 The description agrees well with specimens from the neigh- 

 borhood of Kahuku, where several deposits containing 

 L. oryza are adjacent to the road. This place was also, prob- 

 ably, the source of Newcornb's specimens of oryza, which 

 were figured in Vol. XXI, pi. 3, figs. 60, 61. The recent form 

 from Keawaawa described by Mr. Gulick as Ach. triticea 

 (misprinted "tritacea" in Vol. XXI, p. 28) may prove to be 

 distinct from oryza 7 and the original description is reprinted 

 above. All of the localities represented in collections made 

 by the authors in 1913 are noted here, to show the general 

 distribution of this common Pleistocene species along the 

 north and west and part of the south coast of Oahu. In 

 some places it occurs by myriads. 



In typical L. oryza the striation is distinct, more emphatic 

 near the suture, where the striae bend backward a little. The 

 roughness is slightly exaggerated in pi. 3, fig. 60, of Vol. XXI. 



