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 

 <( Pleurodonte." His name was accompanied by a sufficient diagnosis. 

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

 nuchus, lapicida and isognomostomus (=personata~) ; 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. Demtelluria 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 denned, 

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



mora Gray. P. abnormis Pfr., v, 104. 



redfieldiana C. B. Ad. P. chemnitziana Pfr., v, 104. 



P. bainbridgei Pfr., v, 99. fluctuata C. B. Ad. 



lamarckii v. unidentata Fer. P. lucerna Mull., v, 105. 



v. pretiosa C. B. Ad., v, 100. v. Julia Fer., v, 105. 



v. splengleriana Pfr., v, 100. v. fuscolabris C. B. Ad., v, 106. 

 P. subacuta Pfr., v, 100. P. rhynchsena A. D. Br., v, 106. 



P. acuta Lam., v, 100. P. peracutissima C. B. Ad., v, 106. 



v. acuta Lam., v, 100. straminea Alb. 



acutissima Lam. martiniana Pfr. 



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



v. lamarckii F6r., v, 102. amabilis C. B. Ad. 



v. sublucerna Pils., v, 102. v. media Ad., v, 107. 



v. patina C. B. Ad., v, 102. P. soror Fer., v, 107. 



f. goniasmos A. D. Br., v, 102. quadridentata Mke. 



f. nannodonta A. D. Br., v, 103.P. schrceteriana Pfr., v, 108. 



v. oxytenes A. D. Brown, v, 103. v. chittyana C. B. Ad., v, 108. 



v. ingens C. B. Ad., v, 103. 



