1885.] NATURAL SCIENCES OF PHILADELPHIA. 221 



Belcher Expedition (Voyage Samarang). Similar examples are 

 contained in the collections of Gould, Cox and others, from Upolu, 

 Tutuila and Samoa. In Europe P. expansa Pse., from Tutuila, is 

 the shell often mistaken for zebrina. 



t P. Tryoni Hartm. P. A. N. S., 1885. Solomo,, Islands. 



Buliminoid Division. 

 XII. Guamensis Group. 



f P. Guamensis Pfr. (Bulimus). Phil , Abbild. und Beschreib. Conch., ii, p. 173, 

 pi. 4, f. 9, 1821. Ponape, Caroline Islands. 



P. Guamensis Pfr., ii, p. 73. 



P. Guamensis Rve. Mon. Part., t. 1, f. 4. 



P. brumalis Rve. Mon. Part., t. 1, f. 2. 



Partula Guamensis Pfr. Norn. Helic, 302. Hartm. 



Obs — P. Guamensis Pfr., is not found at Guam, one of the La- 

 drone Islands, and hence is a misnomer, which might be changed 

 to Ponapensis, one of the Caroline Islands, at which it occurs. 

 The Cox collection contained examples labeled Ascension Island. 



P. obesa Pse. A. J. C, iii, p. 223, t. 15, f. 12, 1867. Fortuna and Vavao Islands. 

 P. obesa~Pfr., viii, 201. 

 P. obesa Pfr. Nom. Helic. Viv., p. 302. 

 P. obesa Hartm. Bib. Cat. Part., p. 184. 



Obs. — This species is very scarce as no one has collected in 

 those islands since Dr. Graff visited them. 



P. abbreviata Mousson Jour. Conchyl., xvii, p. 339, pi. 15, f. 7, 1869. Tutuila. 

 P. abbreviata Pfr., viii, p. 200. 

 P. abbreviata Hartm. Bib. Cat. Part., p. 179 (non abbreviata Pse. MS. ). 



f P. rufa Lesson (Bulimus). Voy. Coquille, tome 2, pt. 1, p. 324, 1S30. 0><alan, 

 Caroline Islands. 



P. rufa Pfr., ii, 229 ; Nom. Helic. Viv., p. 302. 



Partnlus rufus Beck. 



Partula rufa Less, (non Carpt., Hartm.). 



Obs. — This shell, of which Dr. Cox and Capt. Brazier have given 

 me examples, has been re-discovered on the Island of Oualan by 

 Capt. Brazier. It is a much larger shell than stolida or ajfinis, 

 with which it is usually confounded. 



