172 BULLETIN OF THE 



is to be supposed, he regarded at that time as obsolete, or synonyms of 

 known species. 



Dr. PfeifFer, in Vol. VIII. of his Monographia Ileliceorum Viventium, 

 has enumerated one hundred and four species, but marks thirteen species 

 of Mr. Pease as unknown to him. This is surprising, as the species of 

 Mr. Pease, both manuscript and published, were freely distributed over 

 Germany long before this publication, through the Museum GodefTroy 

 and private channels. The institution named has published a partial 

 list of Partulse, embracing some of the manuscript species of Mr. Pease. 

 Dr. Piitel in his catalogue has also enumerated about thirty-six species 

 of Partula. Mr. Pease designated about eighty species and varieties of 

 Partula by descriptions, figures, and manuscript names, many of which, 

 however, are synonyms of known species. 



The stations of Partula, as published by Mr. Pease and Dr. Pfeiffer, 

 in many instances are incorrect oi* entirely omitted. These omissions 

 and inaccuracies are often very embarrassing, but in some instances 

 they are attributable to the shells having been collected by missionaries, 

 mariners, and othars, who carried them from one island to another until 

 their identity of station was lost or forgotten ; and in this manner species 

 belonging to Tahiti or the Marquesas have been erroneously accredited 

 to the Sandwich or other islands. In the present catalogue, Mr. Garrett 

 vouches for the correctness of all the stations to which his name is 

 attached. 



So far as known, the genus is confined to the Pacific Islands. They 

 have never been found at the Sandwich group, or Kew Caledonia ; its 

 western limit is New Guinea, and they are not found in New Zealand 

 or Australia. North of the equator, they are found at the Pelew 

 Islands, and as far north as Guam in the Ladrone Islands. The New 

 Hebrides and Solomon's Island have afforded a few species almost un- 

 known to collections in this country. The metropolis of the genus is 

 situated in the Polynesian Islands, but few species being found in the 

 islands of other groups. Of these the island of Raiatea, having a length 

 of fourteen miles and a breadth of three to four miles, is principal : 

 about thirty species and varieties are accredited to this island alone. 

 "The diff"erent species are confined to small areas, or restricted to single 

 valleys, each of which has its specific centre, and the range of many 

 species is quite circumscribed. AYhen a species has migrated to an ad- 

 joining valley, it has retained all the specific characters belonging to its 

 ancestors at the centre of distribution. Certain species and varieties 

 are confined to separate valleys. P. Hebe Pse. will be found in one 



