298 niOCEEBINGS OF THE MALICOLOGICAI SOCIETY. 



PRELIMIXARY DIxVGXOSES OF NEW SPECIES OF NON-MARINE 

 MOLLUSCA FROM THE HAWAIIAN ISLANDS. PART II. 



By E. R. Sykes, B.A., F.Z.S., etc. 



Read Uth June, 1897. 



Since the first of these papers appeared (Oct. 189G, v. ante, p. 126), 

 Mr. Perkins has finished his exploration and returned from the 

 Hawaiian Islands, so that the work of preparing the final report can 

 now be proceeded with ; nevertheless, I have thought it advisable to 

 issue these fcAV diagnoses, drawn out prior to his return, and thereby 

 to conclude the very brief series of descriptions here issued without 

 illustrations. 



1. YiTREA (?) Molokaiexsis, n.sp. 



Testa depressa, albido-hyalina, tenuis, late et aperte umbilicata 

 (umbilicus circa 1 mm. latus), omuino sub lente eleganter regulari- 

 terque costulato-striata, nitida ; spira perdepressa-conoidea, obtusula, 

 apice la3vigata ; anfr. 4j, regulariter accrescontes, sutura impressa, 

 ultimus rotundatus, subdepressus ; apertura subobliqua, ovato-lunata, 

 relative ampla ; peristoma simplex, tenue. Diam. max. 4'6, min. 4mm. ; 

 alt. 2 mm. 



Hah. — Forest above Pelekunu, Molokai (Perkins). 



For remarks, see under the next species. 



2. YiTREA (?) Lanaiensis, n.sp. 



Testa y. Molokaiensi similis sed minor, umbilico profundiore ct 

 minore (circa '5 mm. lato), striis magis approximates et levioribus, 

 infra fere obsoletis. Diam. max. 3-2, min. 3 mm.; alt. r2mm. 



Hah. — Mountains of Lanai, beliind Koele (Perkins). 



M. Ancey has placed^ Helix Sandwicensis, Pfr., H. pauxilhis, Gould 

 (^=pusillus, Gould non Lowe), and a new species, H. Baldwini, in 

 Hjalinia. The first species will, I think, eventually prove not to 

 really come from the Hawaiian Islands, but to be tlic young of some 

 South American Systrophia. M. Ancey has kindly lent me the type 

 of his new sjiecies, and from a comparison of it with the figures and 

 description of Gould's Helix pauxilhis,- I think they are only two 

 forms of the same species. Both come from the same island (Maui) ; 

 both have four whorls; one measures diam. 4"5, alt. 2mm., the other 

 diam. 5, alt. 2-125 mm. ; both are striate above and smoother below; 

 one is " pertenuis," the other "tenuis"; both are "depressa"; one 

 is "aperte umbilicata," "umbilicus mediocris," the other "umbilicus 



1 Bull. Soc. Malac. Fniiice, vol. vi, \^. 102. 



- U.S. Explor. Ex|)(_'(l., Mnll. ]>. 40, pi. iii, li-. -Ki. 



