140 OPEAS JAVANICUM. 



base. Mouth somewhat axe-shaped, the columellar margin 

 reflexed and rather sinuous above. Alt 12.5; diam. max. 

 4 mm." (Sykes). 



Hawaii: Hilo (type loc. Henshaw) and Waipio Pali, 

 Hamakua district ( Thaanum) ; Oahu: Honolulu (D. Thaanum, 

 Dr. W. H. Rush). The Bishop Museum at Honolulu has 

 specimens from Manoa, Oahu, and from Kauai. 



Opeas henshawi SYKES, Proc. Malac. Soc. Loud. VI, p. 112, 

 f. 2 (June, 1904). 



"The salient features of this form are its yellow color, the 

 well marked, curved striae, the size and inflation of the last 

 whorl, and the slightly sinuous columellar margin, which 

 bends to the left above and is not vertical. I have seen about 

 twenty specimens, a few of which are slightly narrower in 

 proportion to the length. This may, very possibly, be the 

 manuscript 0. striolata of Pease. " (Sykes.) 



This is quite unlike other Polynesian species by its sinu- 

 ous, obliquely subtruncate columella at least in the most 

 strongly .characterized specimens, and the better developed, 

 dense and sharp striation, which on the newest part of the 

 shell in unrubbed individuals has a delicate cuticular lamin- 

 ation. The imperforate or almost imperforate axis is another 

 characteristic feature of the shell. The larger specimen fig- 

 ured (pi. 12, fig. 14 from Hilo) measures length 11.5, diam. 

 3.75, aperture 4 mm., whorls 8. The young one figured from 

 the same lot is 7 mm. long, both are from Hilo, the type 

 locality of henshawi. A Honolulu specimen measures 12 x 4 

 mm. 



0. kusaiense of the Carolines is a somewhat less lengthened 

 and openly perforate species, otherwise of much the same 

 structure. On the specimens from Hilo and some of those 

 from Honolulu I see no spiral striation, but in a Honolulu 

 lot collected by Dr. Rush, U. S. N., there are fine spirals on 

 the penultimate whorl, as in the Sumatran specimens de- 

 scribed above. It is likely that 0. javanicum (henshawi) is 

 a newcomer in -the Hawaiian islands, from Java, Sumatra or 

 some neighboring East Indian locality. 



Besides the large and robust form of javanicum described 



