6 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



A. entobaptus is reported from Porto Princesa, Paragua ^Pala- 

 wan) ; A. perversus Linnaeus variety from Busuanga, Mindanao, and 

 Zamboanga, and A. quadrasi Hidalgo from Candaramanes. 



A. cosmandanus Crosse is erroneously listed (p. 618) as Amphidro- 

 mus. This, we learn later from Pilsbry, 1 is Helicostyla crossman- 

 niana Crosse. 



Joaquin Gonzales Hidalgo, in his beautiful Atlas Obras Mala- 

 cologicas 1 reached Amphidromus in 1898. He devoted three plates 

 to the Philippine forms, 99-101. On plate 99, figures 1 and 2 rep- 

 resent a large inflated yellow shell with a whitish band at the sum- 

 mit of its whorls, and a dark varix on the last turn, which is listed 

 under the designation of A. maeuliferus Sowerby var. This we 

 learn from correspondence with Seilor Hidalgo, comes from Dapi- 

 tan, Mindanao. It is our Amphidromus hidalgoi. Figures 3 and 4 

 represent A. chloris Reeve, and 5-8, A. entobaptus Dohrn. 



Plate 100 has 6 figures showing races of A. maeuliferus Sowerby. 

 Of these, figures 1, 4, 5, and 6 represent my Amphidromus maeuli- 

 fei^us cotabatoensis, and figures 2 and 3 appear referable to my 

 Amphidromus maeuliferus cataganensis. 



Plate 101, figures 1-4, are said to represent A. nigrofilosus Roche- 

 brune. They are in reality A. maeuliferus gracilior Fulton. Fig- 

 ures 5 and 6 illustrate A. quadasi Hidalgo and 7 and 8 A. dubius 

 Fulton. 



In his Verzeichness der auf Philippinen Lebenden Landmollusken, 2 

 Dr. Otto von Mollendorff lists on pages 148-150 the following: A. 

 entobaptus Dohrn, from Paragua, with subspecies gracilis Mollen- 

 dorff from Linapakan and Busuanga, and subspecies contracta Mol- 

 lendorff from Koron and Kalamianes. These two names are nomena 

 nuda and have no status. Amphidromus chloris Reeve is listed 

 from Mindanao (Samboanga), A. maeuliferus Sowerby from west- 

 ern Mindanao. Of this he lists subspecies strigata Mollendorff 

 (= u Amph. mac. var. gracilior et strigata, Fulton") from eastern 

 Mindanao and Bohol. Subspecies multicolor Mollendorff, from 

 Leyte and Camotes; subspecies obscurus Fulton from Mindanao and 

 subspecies inflatus Fulton. 



Amphidromus quadrasi Hidalgo is credited to Balabac and sub- 

 species solidus Fulton to Paragua. A. versicolor Fulton and A. 

 dubius Fulton are both listed from Balabac, and A. everetti Fulton 

 from Paragua. 



The last to give these shells consideration was Dr. Henry A. Pils- 

 bry, who monographed the genus in 1900. 3 In this he recognizes 



1 Mem. de la Real Acad, de Sel. Madrid, 1890-1904. 



2 Abhand. Narturf. Ges. Gorlitz, vol. 22, 1898. 



3 Man. Conch., vol. 13, pp. 127-234. 



