

XX CLASSIFICATION OF OLEACINHLE. 



In 0. solidula from Sancti Spiritus, the radula has 16,1,16 

 teeth. The base of the central is wide, its cusp very narrow. 

 The side teeth decrease very slowly in size to the 7th, beyond 

 which they diminish rapidly. The basal plates are curiously 

 curved. The cusps are comparatively thicker and wider than 

 in 0. o. straminea (pi. 36, figs. 16, 19, 20). 



0. orysacea from Trinidad, Cuba (pi. 37, fig. 27), has teeth 

 of quite different type, formula 11,1,11. The side teeth in- 

 crease in size from the first to the 5th. They have very 

 short stout cusps, and wide basal-plates. The 7th tooth is 

 abruptly smaller, and like those of the other species. This 

 radula resembles that of Salasiella, and is more specialized 

 than in other Oleacinidcz examined. 



0. miilleri from Sans Souci, Haiti (pi. 37, figs. 21, 22, 23, 

 28), has 22,1,22 teeth, much like those of 0. solidula but with 

 more slender, graceful cusps. The central tooth (fig. 23 right 

 hand figure, from above, fig. 23 left hand fig. obliquely from 

 below) has the usual long, slightly curved cusp. The laterals 

 decrease in size from the first. The outer ones are rather 

 broadly lanceolate as seen from above (fig. 21), but from 

 the side (fig. 20) they appear very narrow, the cusps being 

 flattened. The radula, natural size, is drawn on the left 

 of fig. 8, plate 25. 



Rectoleacina. 



Soft anatomy unknown. It will probably prove to re- 

 semble that of L&voleacina. 



POIRETIA. 



By the shell this Mediterranean group seems related to 

 Euglandina, but the soft anatomy is more that of Lavoleacina, 

 the penis terminating in a similar blind sack. The salivary 

 glands, if correctly figured by Raymond, are separate, while in 

 American genera they are united. It should be noted that 

 Raymond's figures of the genitalia of P. algira are quite in- 

 correct. He mistook the penis for the spermatheca, and ap- 

 parently lost the latter, but identified its duct as the penis. 



Poiretia is undoubtedly distinct from all American genera. 

 See p. 164. 



