30 



Hab, in Columbia. (Salango.) 



This pretty species belongs to that group of Helices which so much 

 resemble Planorbis. — W. J. B. 



Genus Carocolla. 

 Carocolla globosa. Car. testa orbiculatd, subcaslaned, infri 

 tur giddy anfractu basali subangulato, scabriusculo ; labro uni- 

 dentato, rejiexOy albo, dente magno ; aperturd Jusco-caslaned, 

 umbilico mediocri : long. -g-, lat. 2^ poll. 

 Hab. in sylvis Insula? Tumaco, Columbia? Occidentalis. 

 An obscure band runs round the angle of the basal whorl. Ex- 

 posure to the weather causes the chestnut colour of the shell to 

 acquire somewhat of a blueish cast. — W. J. B. 



Carocolla quadridentata. Car. testa crbictdatdyfusci, an- 

 fractu, basali turgido, angulatOy scabro ; labro subreflexo, albo, 

 intus tridentato ; aperturd Jliscdy dente albo Jalcato armatd ; 

 umbilico magno : long. 4-, la t, 4- poll. 

 Hab, in sylvis America? Centralis. (Woods near the Gulf of 



Dulce.) 

 This species approaches nearly to Car. Labyr'inthus: the white 

 elevated tridentated lip is continued round the aperture: the single 

 white falcated tooth is not attached to the lip, but rises within it 

 from the lower surface of the basai whorl. — W. J. B. 



Genus Bulinus. 

 * Labio externo tenui, acuto. 

 Bulinus Broderipii. Bui. testd ovato-pyramidaliy tenuiy albi- 

 cante y nigro Julvoque elegantissime maculatd et variegatd; an- 

 fractibus qui?ique, rapide crescentibus, paullulum ventricosis ; 

 suturd subcoiifluenti ; superficie granulis minimis y longitudinaliter 

 seriatim dispositis : long. 1%, lat. 1^ poll. 

 Hab. in fissuris rupium prope Copiapo Chilensium. 

 Var. testa nana, albicante-rosacea, laeviore, maculis nigris ma- 

 joribus et seriatim dispositis 



Hab. in fissuris rupium prope Iquiqui, in Peruvia. 

 The dwarf variety was found at an elevation of 2500 feet above 

 the level of the sea. — G. B. S. 



Bulinus Coturnix. Bid. testd glohoso-pyramidaliy anfractibus 

 quatuor ad quinque, ventricosisy albicantibuSy fusco macvlatis et 

 variegatis ; suturd distinctd; superficie tenuissime transvcrsim 

 striata; umbilico parvo : long. 1^-, lat. ^ poll. 



Hab. sub lapides in aridis apud Huasco Chilensium. 



From the preceding species the present is easily distinguished by 

 its more globular form and the possession of an umbilicus. — G. B. S. 



Bulinus Coquimbensis. Bid. testd levi, ovato : fusiformi,Jragili t 

 subdiaphand, albido-Jiiscd, maculis strigisque nigro-fuscis spars:/; 

 anfractibus &ex> longitudinaliter striatis, ultimo maxima ; labro 

 acuto: long. 1 X V> lat, xV poll, 



Hab. ad Coquimbo in montibus. 



