107 



Hab. in Peruvia. (Huantajaya near Iquiqui.) 

 Found under stones on hills 2500 feet above the level of the 

 sea.— W. J. B. 



Bulinus derelictus. Bui. testd ventricoso-pyramidali, albidd, 

 subdiaphand ; anfractibus 6 longitudinaliter striatis; apice so^ 

 lidulo, subpapillari ; umbilico mngno : long. T V, lat. \ poll. 



Hab. ad Cobijam Bolivia?. (Puerto del Mar.) 



Found unprotected on flat rocks without soil or verdure : all 

 was desolate for a league around. — W. J. B. 



Bulinus varians. Bui. testd elongatd, subnitidd, castaned, ma- 

 culis strigisque albis varid ; anfractibus 8 longitudinaliter striatis ; 

 umbilico medio cri : long. 1 VV* lat. ^ poll. 



Hab. in Peruvia? montibus. (Truxillo.) 



A whitish band may be traced at the upper part of each whorl next 

 to the suture, and another at the base of the body- whorl. But this 

 species varies so much in its markings, that hardly two individuals 

 are alike. Some are also rather more ventricose than others. 



Found on the same species of Aloe and in the same places with 

 Bui. pulchellus.—W. J. B. 



Bulinus Tigris. Bui. testd cylindrico-fusiformi, nitidd, subglabrd, 

 fulvo-albente longitudinaliter castaneo strigatd ; anfractibus 7 

 longitudinaliter striatis; columella subcallosd ; umbilico tantum, 

 non obtecto : long. l£, lat. 4- poll. 

 Hab. in Peruvian montibus. (Truxillo.) 



This differs from the preceding in many points. The body- whorl 

 is of considerably greater length in proportion, and the aperture is 

 consequently much longer and more acute at the upper part. 

 There is somewhat of a callosity on the columella, and the umbilicus, 

 which is small, is almost hidden by the reflected inner lip. 

 Found on bushes. — W. J. B. 



*** Labio exteriore subreflexo. 



Bulinus Proteus. 1. Bui. testd ovato-acutd, sordide albidd fulvo 

 maculatd ; anfractibus 6 creberrime longitudinaliter granuloso- 

 striatis, ultimo maximo, ventricoso ; umbilico magno ; epidermide 

 tenui : long. 1|-, lat. l^V poll. 



2. Far. granulis striisque paullo elevatioribussubalbidis: long. 1-jV, 

 lat. 1 poll. 



3. Var. albida fasciis castaneis : long. l-§-, lat. f poll. 

 Hab. in Peruvia? montibus. (St. Jacinta, near Samanco.) 



4. Var. nana, albida fasciis interrupts sordide castaneis : long. 

 ItV, lat. A poll. 



Hab. in Peruvian montibus. (Pacosmayo.) 



Obs. After a careful examination of numerous individuals, I am 

 unable to detect any specific characters which may be safely relied 

 on to separate the four varieties above described. There is indeed 

 a considerable difference in size between the first and the last ; but 

 I have seen many instances where food and locality have had as 

 much effect in the development of the volume of a shell, as they 



