| 53 
Dalhousie Springs hydrobiids 
Figure 2. Shells of. Dalhousia species and Fluvidona centralia. A-C,F.G. D. harrisi. AMEDEE) Ge 4 
Spring Cal3A; F.G, Spring Са? (station C643). D,E. F. centralia. D, holotype; E, lower o 
(station D62). H, D. globosa, holotype. Scales 0.5mm. 
