402 On Land- Mollufiks from Java. 



tliere is a slioit retractor muscle, and in this species there is 

 also a short broad muscle arising from the wall of the vesti- 

 bule and inserted into the wall of the proximal portion of the 

 dart-sac. Beneath the muscular sheath is a thicker muscular 

 coat, which encloses the solid distal portion. The dart is 

 situated in the proximal portion, which lies above the penis 

 and vagina. It is a small line calcareous rod, slightly spatu- 

 late at its head, app'roaching somewhat the shape of that in 

 M. Stnibelli, Simr., and about 2 millim. long (PI. VIII. 

 fig. 19). 



Affinities. 



This species is undoubtedly closely allied to AI. Austeni, 

 Simr. It agrees with it in the peculiar nature of the integu- 

 ment of the body and in the general structure of the generative 

 organs. A comparison of figures 7 and 8 with figures 16 and 

 17 will illustrate this relationship. 



M. Austeni, however, differs from M. javanica in the 

 following particulars : — 



a. The external form and internal structure of the penis 

 (cf. figs. 9 and 18). 



h. In M. Austeni the free oviduct shows a sac-like dilata- 

 tion opposite to and below the receptaculum seminis. 



c. The dart-sac is not so long as in M. javanica, and there 



are slight differences in the form of the darts. 



d. U'he prostatic portion of the common duct is in M. Austeni 



terminally free and globose. 



Blhliography, 



(!) Plate, Ludwig H. — " Studien liber opisthopneumone Liingen- 

 sc-hneclieu. — I. Die Anatomie der Gattungeu Daudebardia iind 

 TesfaceUar Zool. Jaliib. (Abtli. f. Morph.) 18!^, 13d. iv. 

 pp. 505-630, Taf. xxxii.-xxxvii. 



(2) Semper, C.^ — Keisen im Arcbipel der Philippinen, Bd. ii. IT. 3. 



Landmollusken. 



(3) SiMEOTH, IIeineich. — " TJeber einige P«nnrt;707i-Arten." Zoolo- 



gisclie Ergebnisse einer Reise in NiederlJiudiscb 0.st-lndien, 

 1893, Bd. iii. pp. 100-111, tab. vii.-viii. 



(4) SiMROTH, Heineich. — " Ueber die Gattiiugen Parmacochlea, 



Farmarion, und Microparmarion.'^ Zool. Jahrb. (Abth. f. 

 Syst.) 1898, Bd. xi. pp. 151-172, Taf. xv. 



EXPLANATION OF THE PLATES. 



Plate VII. 



Figs. 1, 2. Fannarioji pupillaris, Humb. Generative organs, sbowing 



variations in^tlie form of the receptaculum seminis, penis, &c. 

 2''}(/. 3. Microparmarion Avsteni, Simr. View from the right side, X 2. 

 Fig. 4. Ditto. View from the left side, X 2. 



