Cooke—Hawanan Zonitidae and Succineidae 275 
Catinella paropsis new species. Pl. XXV, 3. 
The shell is rather flat, ellipsoidal in outline, slightly flattened at the 
sides, rather thick, nearly opaque, dull, and of a dark olive-buff color. 
Whorls about 1%, the spire immersed. The last whorl is somewhat convex 
above, its dorsal surface minutely striate with concentric lines of growth 
and in addition marked with faint, broken, slightly radiating shallow sulci, 
which are also visible when viewed from within. The aperture occupies 
nearly the whole of the ventral side, its outer margin slightly undulating 
and edged by a narrow dark line. The parietal wall is furnished with a 
rather broad long plate which terminates within the outer wall of the 
aperture and is separated from its margin by a deep sinus. 
Length 11.7, diameter 7.5 mm. 
Oahu: Kaipapau, near the summit of the Koolau Range 
(Cooke). 
Type No. 19307, paratypes No. 19410, Bishop Museum, and 
also in the Academy of Natural Sciences of Philadeiphia. 
So far as known this species is entirely terrestrial in its 
habits; all the specimens were found on very damp dead leaves. 
This species is extremely rare; the collection of the Bishop Museum 
has only four lots from different colonies numbering altogether 
I5 specimens, most of which are immature. These were found in 
dark and damp heads of ravines near the summit of the Koolau 
Range between Punaluu and Kaliuwaa. 
Catinella paropsis is entirely distinct from any of the species 
already described from the Territory of Hawaii. Its closest rela- 
tives (except the following species Catinella tuberculata) appear to 
be the extremely flat Catinella explanata and Catinella rubida from 
the island of Kauai. From these it differs in the greater convexity 
of the last whorl, the thickness of the shell, and the peculiar radiat- 
ing dorsal sulci. 
Catinella tuberculata new species. Pl. XXV, 2. 
This species is represented in the Bishop Museum by two 
specimens. One is of about the same color as Catinella paropsis 
(dark olive-buff), the other, the type, is of a slightly darker shade. 
Catinella tuberculata is easily distinguished from Catinella paropsis 
by its tuberculate surface, the tubercules being formed by wrinkled 
anastomosing sulci, which are so deeply impressed into the structure 
of the shell that the inner surface of the aperture is distinctly 
[15] 
