28 Moll. 
VII. MOLLUSCA. 
/. Neotropical Zone. 
23 . Peruvian Region. 
List of Clausilice, with Clausilia evce , n. sp. ; Sykes (341). 
Peru : — Helix ( Xenothauma ) bcironi , Porphyrobaphe vicaria , n. spp. ; 
Fulton (115) : Bulimulus ceroplasta , flayellatus , n. spp. ; Pilsbry in 
Tkyon (35G) : Planorbis heteropleurus , n. sp., Lake Titicaca ; Pilsbry 
(251). 
Galapagos Is. : — Fauna with Bulimulus nesioticus, n. sp. ; Dall (77) : 
Fauna, review of Dali ; Kobelt (166). 
24 . Columbian Region. 
List of Clausilia}, with Clausilia evce, n. sp. ; Sykes (341). 
Bogota: — Porphyrobaphe approximata , n. sp. ; Fulton (114). 
25 . Brazilian Region. 
Brazil : — Neohyalimax brasiliensis, n. g. & sp. ; Simrotii (306). 
26 . Mexican Region. 
Central America : — Pachycheilus dalli , n. sp. ; Pilsbry (250). 
Mexico : — Polygyra , 4 new species j Pilsbry (248) : Shells of the 
northern boundary, with new species of Ccelocentrum , Anisospira , and 
Streptostyla ; Dall (78). 
27 . Caribbean Region. 
San Domingo : — Sagcla (?) gabbi , n. sp. ; Pilsbry (249). 
Cuba : — Cerion , 2 new species ; Pilsbry & Vanatta (264). 
Bahamas : — Cerion nitelokles , n. sp. ; Dall (76) : Cerion , 7 new specios ; 
Pilsbry & Vanatta (264). 
g . Nearctic Zone. 
Pisidium trapezoideum , n. sp. ; Sterki (328). 
28 . American Region. 
United States: — Distribution of Planorbis umbilicatellus ; Vanatta 
(357). — Eastern U. S. : Pisidium , 2 new species ; Sterki (331). — 
Mississippi Valley Unionidce in the St. Lawrence and Atlantic drainage 
areas; Simpson (301): Mollusca of Mexican boundary; Dall (78). — 
Alabama : Pomatiopsis hinldeyi , n. sp. ; Pilsbry (257). — Florida : Ancy- 
lus peninsulce, n. sp. ; Pilsbry (255) : Unio hartwrightii , n. sp. ; Wright 
(388) : Cyrenoidea florulana , n. sp. ; Dall (83). — Illinois : Ancylus 
eugraptus , n. sp. ; Pilsbry (255). — Louisiana: Unio frier soni , n. sp. ; 
Wright (389). — Minnesota : Freshwater shells of Clearwater, Wright 
co. ; Sargent (288). — Michigan : Pisidium vesicidare, n. sp. ; Sterki 
(330). — Ohio : Pisidium falax, n. sp. ; Sterki (330). — Tennessee : 
Gastrodonta collisella , n. sp. ; Pilsbry (254). — Texas : Polygyra latispira , 
n. sp. ; Pilsbry (248): Unio askewi, n. sp. ; Marsh (199). — Virginia: 
Unio bursa-pastor is, n. sp. ; Wright (389). 
