AURICULELLA, OAHU. 



HARTMAN, Proc. Acad. N. S. Phila., 1888, p. 15. ANCEY, 

 Bull. Soc. Malac. France, vi, 1889, p. 214. SYKES, Fauna Ha- 

 waiiensis, ii, p. 378. Auriculella solida Gulick, BLAND, Ann. 

 Lye. N. H. of N. Y., x, 1874, p. 332 (name only). 



We have examined the specimens in Pease's collection at 

 Cambridge and those presented to the Academy of Natural 

 Sciences of Philadelphia, most of them belonging to Pease's 

 variety only; the coloration described as typical being rather 

 rare. The figure in the Journal de Conchyliologie represents 

 the ' ' pale straw-colored ' ' variety. The typical coloring as 

 shown by a Pease specimen (pi. 23, fig. 5) is white with a 

 broad grape-green zone above the periphery, changing on the 

 penultimate whorl to brown, the summit being deep brown. 

 There is a border of the white ground below the suture, as- 

 cending the spire, and a small brown area around the umbili- 

 cus. Other specimens of the Pease lot have the last whorl and 

 summit and peristome cinnamon, intervening whorls very 

 -dark with a very narrow white sutural margin (pi. 23, fig. 6), 

 or the whole shell may be marguerite yellow or sea-foam yel- 

 low, this being Pease's variety. Of 14 specimens seen from 

 Pease, 3 are sinistral. None of these shells equals Pease's 

 measurements, the largest being 9 mm. long, 4.6 iu oblique 

 diameter. 



The shell is very much like A. auricula, but differs by being 

 more solid, usually larger, and by having a strong tubercle 

 at the posterior end of the parietal callus, connecting with 

 Die end of the outer lip. The lip is beveled in the upper 

 half, from an angulation or keel running parallel with its 

 edge. The width of the bevel varies in different colonies, 

 being narrow in the east, but often wider, with a more pro- 

 nounced keel, in the yellow western form which Gulick called 

 .solida. The lower half of the peristome has an obtuse rounded 

 edge. The latter part of the last whorl is often quite notice- 

 ably flattened peripherally, and the base is sack-like. It may 

 be either dextral or sinistral. Tn one lot from high in Waolani 

 there are 26 dextral and 35 sinistral individuals. 



The Waianae species malleata and anibusta, and particu- 

 larly A. anibusta oUiqua, differ from pulchra by the narrower 



