270 LYROPUPA. 



though up to this time no other Hawaiian specimens have been 

 turned up. The species was referred to costata Pse. as a 

 synonym by the senior author (Proc. A. N. S. Phila. 1900, p. 

 432, footnote 4), upon comparison of the figures with examples 

 of L. tha-uma-sia- which Pease sent out as costata ; but there are 

 some small differences in shape which cause us now to leave 

 them apart. 



The type specimen of cnbaiui has lamellae arid folds like 

 those of thaumttsia. In both species the broad, milk-white 

 colmnellar lamella may be seen in an oblique view in the 

 aperture. The lower palatal fold is short and rather high. 

 The internal barrier is not visible in the mouth, but externally 

 the impressions and the light markings due to the plicae are 

 exactly as in thawmasia. The specimen measures : length 1.9, 

 diam. 1.3 mm., alt. of aperture 0.8 mm. Figs. 16, 17 are 

 copies of the original illustrations: fig. 13 a direct face view 

 of the same specimen. 



22. LYROPUPA THAUMASIA ( '. & P., n. sp. PI. 24, tigs. 13 to 15 : 

 pi. 25, fig. 14. 



The shell is small, broadly oval, perforate and rirnate, tawny, 

 solid. Outlines of the spire are strongly convex. The whorls 

 are short, convex, the embryonic li/o very minutely granulate, 

 the rest with sculpture of moderately strong, oblique, some- 

 what arcuate ribs about half as wide as their intervals, about 

 27-30 on the last whorl, which ascends slightly near the aper- 

 ture. There are minute spiral striae between the ribs. The 

 last half whorl has a rather shallow sulcus (sometimes scarcely 

 noticeable) parallel with the suture, and nearer the base a 

 shorter broader excavation preceded by an inflation. The base 

 is narrow, rounded and straight (as viewed from below), 

 passing posteriorly into the baso-dorsal inflation mentioned. 

 The aperture is but slightly oblique, squarish, the peristome 

 well expanded, continuous, though adhering to the preceding 

 whorl for a short distance above the columella. The angular 

 lamella is rather long and straight; its edge curves slightly 

 outward, to form a nearly entire circular siuulus with the 

 upper palatal plica. The parietal lamella is very long, curved 



