Ixii rOKPHYROBAPHE, MGUUS. 



Jaw (of P. iostoma, according to Fischer) composed of 19 plaits. 

 Radula with 85.1.85 teeth, like those of Oxystyla. Genitalia (pi. 55, 

 tig. 45, after Fischer) with the penis and vagina short, the gland or 

 appendix of the penis large and lobed. The duct of the spermatheca 

 is about half the length of the oviduct. 



This genus differs from Oxystyla chiefly in the shortness of the 

 spermatheca duct and vagina, and the thick or blunt lip of the shell. 

 Distribution, northwestern Peru to Colombia. 



Group of P. iostoma. 



P. iostoma Sowb., xii, 150. P. saturnus Pfr., xii, 153. 



phasianella Val. P. flori Jouss., xiv, 164. 



v. bi lab rat us Pils., xii, 152. saturamts and satuanus Pfr. 



P. integer Pfr., xii, 153. 



Group of P. irroratus. 



P. irroratus Rve., xii, 155. P. grevillei ' Sow.' Pfr., xii, 156. 



v. elongata Mill., xii, 156. P. iris Pfr., xii, 157. 



v. minor Mill., xii, 156. waUisianus Mouss. 



P. subirroratus DaC. xiv, 163. 



Group of P. dennisoni. 



P. dennisoni Rve., xii, 158. ? P. victor Pfr., xii, 160. 



v. marmatensis Pils., xii, 159. 

 v. obscurata Mss., xii, 159. 



Genus LIGUUS Montfort, 1810. 



Manual xii, p. 161. Long-conic, smooth shells, white, usually 

 variegated in bands or streaks with pink, green or yellow, cuticle 

 inconspicuous or absent ; outer lip simple, not expanded ; columella 

 usually truncate below, sometimes continuous with the basal lip. 

 The typical group inhabits the Greater Antilles, subgenera occurring 

 in northern South America. The species so far as known are 

 arboreal. 



The mantle-edge (of L. fasciatus) bears two conspicuous flange- 

 like lobes, one dorsal, the other along the left margin, and separated 

 from the neck-lobe by a narrow notch. The kidney is short and 

 triangular, with completely closed secondary ureter, as in Oxystyla. 

 The reticulation of the lung is substantially as in Oxystyla, except 

 that the first branch of the pericardial vein is longer, about as long 

 as the pulmonary vein. The venation of the cardiac side of the 

 lung is weak and sparse. 



