Descriptions of JS T ew Species of Achatinella. 245 



yielding many new species. I have since explored all that 

 part of the island, and none of these species were found, nor 

 any whose affinities indicated an approach to the home of such 

 forms. But as I departed from the valleys near Honolulu into 

 Kolau, I found the varieties and species differing more and 

 more from that type. The unavoidable inference is, that in- 

 stead of being from Kolau, they are from the valleys near 

 Honolulu, where A. vuljnna, Byronii, and Stewarti abound. 

 The strength of this inference will be best appreciated by those 

 who are acquainted with the limited distribution of the groups, 

 as well as of the species of this genus, and the relation between 

 their geographical distribution and the graduation of their 

 types. 



Moreover the peculiar markings of these specimens do not 

 extend within the aperture, where they would also appear if 

 natural. The pink band of A. aplustre is cut off abruptly at 

 the aperture, in entire variance from the laws of arrangement 

 of color which prevail in this genus. 



Dr. Newcornb has followed in restoring A. Uvida, making it 

 include, besides Swainson's type, A. Emersonii Newc, A. 

 glauca Nob., and A. Beevei Ad. If A. Emersonii and glauca 

 are to be merged in A. Uvida, would not a consistent system 

 of classification require that A. recta and undulata should 

 likewise be placed under J., curta, since the relation is similar? 



I have never seen A. Reevei Ad. ; but if I can judge of its 

 affinities from Reeve's figure, it is different from the others, 

 and will probably be found on the island of Molokai. 



63. Achatinella obliqua. 



Plate VIII. Fig. 63. 



T. sinistrorsa, subperforata, ovata, basi oblique truncata, solida, 

 nitida, striata, cinereoqdurnbea, infra suturam late albo-cincta; apice 

 obtusa ; spira convexo-conica ; sutura submarginata, leviter impressa ; 

 anfr. 6. subconvexis ; ultimo magno ; plica columellari mediana, alba, 



