1871.] F. Stoliczka — Notes on Terrestrial Mollusca. 243 



on tho convex side, and provided with ramified appendages. Two 

 of these tubes, terminated with a kind of leathery, white bags, each 

 being provided at the end with a long horny flagellum, the third 

 had none, but it may have been broken off. These leathery bags, 

 together with the end retractor of the penis, were originally located 

 at the end of the prostata (n in fig. 5). Between these horny 

 tubes there was twisted a very long thread (fig. 7,) bearded in its 

 entire length, and apparently consisting of a transparent, glassy 

 substance. Of the same substance a few other simple threads 

 were also observed (fig. 8), 



The horny tubes are all hollow and apparently filled with a gra- 

 nular substance, of which, however, the terminal bags contained 

 only a small quantity. • 



I can form at present no correct idea what the physiological 

 and morphological value of this very singular and most compli- 

 cated appendage is. Possibly it may in some form or other replace 

 the seminal receptacle, or the arrow sac, for appendages containing 

 similar horny tubes also occur in other Zonitid;e, (see p. 249), 

 and in these a special seminal receptacle is also not developed. 

 Examinations of living specimens, must, however, be made, in order 

 to ascertain the true physiological facts. 



The seminal duct has a long appendage enclosing a thin flagellum ; 

 next to it it i&enlarged into a calciferous gland, the calcareous bodies 

 being of a broadly ovate form, acuminate at either end ; enlarged 

 to 150 diameters they are seen only as the finest sand. The lower 

 portion of the penis is rather muscular ; towards the end it is 

 strongly twisted. 



The jaw is semilunar, rather narrow, smooth, finely radiately 

 striated on the inner side and besides marked with very minute 

 stride of growth; it possesses an obtuse projection in the middle of 

 the front edge. 



The radula is large, composed of about 60 transverse series of 

 teeth, arranged in almost perfectly straight lines. The central 

 tooth has a single median rather abruptly contracted cusp, laterally 

 it is only slightly flexuous, but not distinctly denticulate ; it is 

 somewhat smaller than either of the adjoining teeth. Ten teeth in 

 each row on either side of the central tooth are conspicuously larger 



