LAMINELLA, LANAI. 333 



from 2-4 feet high, commonly about 2 feet. The bark is used 

 for twine, after being properly prepared by the natives. It 

 always grows in damp places. 



A peculiarity about these shells is that they will drop 

 from the leaves at the least disturbance. Mr. Oleson has 

 never found the living shells on the ground when the plant has 

 not been disturbed. It is a very prolific shell, and is gener- 

 ally in great numbers. 



SPECIES OF LANAI. 



The species of Lanai are related to the picta group of 

 Maui, and in a much smaller degree to Oahuan forms. L. 

 concinna is a rather isolated species. 



a. Small shells, less than 10 mm. long; ovate, yellow, some- 

 times with black bands ; whorls convex. 



L. concinna, no. 6. 

 a 1 . Larger shells, with network of angular black lines on a 



pale ground. 



&. Pale buff with a rose band below suture; 18.5x11 to 

 14x9.5 mm. L. tetrao, no. 4. 



& 1 . Narrower, diam. about y 2 length. 



c. Somewhat turrite; early whorls smooth. 



L. t. gracilior, no. 4<z. 

 c 1 . Ovate, third whorl costulate. L. remyi, no. 5. 



4. L. TETRAO (Newc.). PI. 54, figs. 1-7. 



Shell subperforate, sinistral, globose-conic, pale, broadly 

 banded with red below the suture, all over densely reticulated 

 with greenish-brown epidermis; spire conk, rather acute. 

 Whorls 6y 2 , the upper ones flat, the rest very convex; last 

 whorl globose, a little shorter than the spire. Aperture ob- 

 lique, semioval, white within; columellar fold laminiform, 

 somewhat oblique; peristome simple, unexpanded, acute, the 

 columellar margin roseate, somewhat free. Length 16, diam. 

 8.5 mm. (Pfr.). 



" Animal tessellated above with brown and white; mantle 

 dirty yellow ; bottom of foot same color margined with white ; 

 tentacles light-brown " (Newc.}. 



