PLEURODONTE. 



89 



This group has hitherto been called Pleurodonta or Lucerna; but 

 Fischer's Latin form of the word, as well as his French version, was 

 " Plenrodonte." His name was accompanied by a sufficient diagnosis. 

 He included several species of the Jamaica group, and also H. lych- 

 nuchus, lapicida and isognomostomus (=personatoC) ; but as these 

 three have been made the types of subsequent groups, we obtain by 

 elimination a residue of several congruous species, of which the first 

 one of his list has been selected as the type. Dentellaria Schu- 

 macher was proposed for two species, the first one of which was unde- 

 scribed and unfigured, but compared with an old illustration prob- 

 ably representing a small form of H. acuta ; the second being H. 

 sinuata Mull. Lucerna, proposed anonymously by Humphrey in 

 the sale catalogue of M. de Callonne's collection, was not defined, 

 and contains none of the Jamaica group, so far as one may judge 

 by the fantastic list of species given under impromptu names of the 

 auctioneer's manufacture. He seems to have included Labyrinthus, 

 Anostoma and Phania among other shells ; but the work is not 

 worthy of quotation in scientific literature, and its introduction 

 therein by the Adams brothers has caused nothing but confusion. 



Species. 



P. carmelita Fer., v, 99. 



mora Gray. 



redfieldiana C. B. Ad. 

 P. bainbridgei Pfr., v, 99. 



lamarckii v. unidentata Fer. 



v. pretiosa C. B. Ad., v, 100. 



v. splengleriana Pfr., v, 100. 

 P. subacuta Pfr., v, 100. 

 P. acuta Lam., v, 100. 



v. acuta Lam., v, 100. 

 acutissima Lam. 

 heteroclites Lam. 



v. lamarckii Fer., v, 102. 



v. sublucerna Pils., v, 102. 



v. patina C. B. Ad., v, 102. 



f. goniasmos V A. D. Br., v, 102 



f. nannodonta A. D. Br., v, 103 



v. oxytenes A. D. Brown, v, 103 



v. ingens 0. B. Ad., v, 103. 



v. nobilis C. B. Ad., v, 103. 

 P. abnormis Pfr., v, 104. 

 P. chemnitziana Pfr., v, 104. 



fluduata C. B. Ad. 

 P. lucerna Mull., v, 105. 



v. Julia Fer., v, 105. 



v. fuscolabris C. B. Ad., v, 106. 

 P. rhynchaana A. D. Br., v, 106. 

 P. peracutissima C. B. Ad., v, 106. 



straminea Alb. 



martiniana Pfr. 

 P. cara C. B. Ad., v, 107. 



amabilis C. B. Ad. 



v. media Ad., v, 107. 

 P. soror Fer., v, 107. 



quadridentata Mke. 

 P. schroeteriana Pfr., v, 108. 



v. chittyana C. B. Ad., v, 108. 



