ELASMIAS. 113 



W. Maui: Maunahooma (Cooke, Forbes); Honokowai 

 (Thaanum). Type no. 14148 (Bishop Mus.) ; cotypes no. 

 13871 (Bishop Museum), and no. 111919 A. N. S. P. 



In adult shells the columellar folds are less oblique than in 

 immature specimens, and extend nearly to the margin of the 

 columella. 



In the original series collected by the author about 40 speci- 

 mens were taken. A later trip by Mr. Forbes and the author 

 yielded only 12 specimens. All the specimens were taken on 

 the trunks of guava trees. 



Genus ELASMIAS Pilsbry. 



Elasmias PILS., Nautilus xxiii, March, 1910, p. 122, type 

 Tornatellina aperta Pse. 



The shell is imperforate, globose-conic or rotund-ovate, com- 

 posed of few (3 to 4^) whorls, usually striate spirally. Aper- 

 ture large, the columella calloused, in form of a wide or nar- 

 row vertical plate, bilobed or angular, but without deeply en- 

 tering lamellae, truncate or excavated below the plate ; parietal 

 lamella as usual in the family. Viviparous or ovo- viviparous. 

 Radula as in Tornatellina. 



Type : E. apertum (Pse.). Distribution: islands of the cen- 

 tral and western Pacific and Indian Ocean; Australia. Liv- 

 ing on the leaves of plants. 



This genus occurs in some places throughout the range of 

 the family with the exception of New Zealand and the islands 

 off South America. In the area both inhabit, Elasmias is far 

 less generally diffused than Tornatellina. 



"The animal [of E. apertum], which is very active, is sub- 

 pellucid with dusky tentacles. The foot is oblong, rounded 

 behind, and nearly as long as the shell. The eye-peduncles 

 are stout. Labial tentacles, none. Muzzle large, dilated, and 

 aids in locomotion" (Garrett). 



Professor C. Semper dissected T. manilensis, but did not 

 obtain a successful preparation of the genitalia. He noted 

 that "the penis appeared to be simple. In the uterus were 

 four or five eggs, the lowest containing a fully-developed em- 

 bryo, the shell of which formed more than one entire whorl. 



