XV111 CLASSIFICATION OF OLEACINID^E. 



known. Four species of the subgenus Lavoleacina have been 

 more or less fully examined. It remains to be seen whether 

 the two groups are really referable to one genus. 



The genitalia of Lcevoleacina are very characteristic and 

 quite unlike Euglandina and Varicella. In Cuban species 

 examined the penis bears a well-developed appendix, and 

 terminates in a hollow sack, beyond the insertion of the 

 epiphallus. From its structure and position I do not believe 

 this sack to be homologous with the flagellum of Varicella. 

 The retractor of the penis is inserted on the epiphallus. The 

 spermatheca is small on a very long duct. 



Oleacina oleacea straminea (Dh.) from near Cienfuegos, 

 pi. 33, fig. 9, has a long, narrow foot, 40 mm. long in an 

 alcoholic specimen. The usual pair of dorsal furrows are 

 well developed. The tail is very long and slender. It is pale 

 yellowish, with a narrow purplish-brown stripe between the 

 dorsal furrows and wider ones on both sides of the body. 

 The tail has a median dusky streak. The labial processes are 

 well developed, as in Euglandina. The genital system (pi. 35, 

 fig. 12) has a long penis (p) terminating in a long terminal 

 sack (p. s.) and a very slender epiphallus, which is a little 

 swollen where it joins the vas deferens, and on which the re- 

 tractor muscle (r. p.) is inserted. Very near the base of 

 the penis there is an oval appendix (app.) This was col- 

 lapsed or grooved in several specimens opened, as shown in 

 figures 13 (median transverse section) and fig. 11; but in an- 

 other the appendix was smooth and oval. The penis, to ori- 

 gin of the epiphallus is 10 mm. long, its terminal sack is 13.5 

 mm. long. The vagina is long. Spermatheca (sp.) oblong, 

 on a very long duct (sp. d.). There is a very large prostate 

 (pr.) and long oviduct, to which the duct of the spermatheca 

 is closely bound throughout. The salivary glands are con- 

 crescent into a compact mass. 



0. SOLIDULA (Pfr.). Specimens dissected are from under 

 an old tie in the yard of the T. & S. S. railway at Sancti 

 Spiritus. Externally it is uniform whitish. There is the 

 usual double dorsal groove, and short, triangular labial palpi. 

 The penis is shaped like that of 0. o. straminea, but its ter- 



