OF THE LEYDËN MUSEUM. 203 



Pelscneer, P. Idem. Prt. II. — The Tliecosomata. Challenger-Expe- 

 dition, Zoology. Prt. LXV, ]888. 

 // and G. H. Fowler, Biscayan Plancton collected during a 

 cruise of H. M. S. //Research", 1900. — Prt. VII. — 

 Mollusca (excluding Cephalopoda). Transactions Linn. 

 Soc. London, vol. X, Prt. 5, 1906. 



Sars, G. 0. Bidrag til Kundskaben om Norges arktiske Pauna. I. Mol- 

 lusca regionis arcticae Norvegiae, 1878. (pp. 328 — 332, 

 PI. 29\ 



Schiemenz, P. Die Pteropoden der Plankton-Expedition (Part F, b of 

 the //Ergebnisse der .... Plankton-Exp. . . . von Victor 

 Hensen"), 1906. 



Tesch, J. J. The Thecosomata and Gymnosomata of the Siboga-Expe- 

 dition, Siboga-Expeditie, Monogr. LII, 1904. 



Leyden Museum, November 1907. 



EXPLAI^ATION OF PLATE 7. 



Figs. I — 3. Limacina lesueuri (d'Orbigny). 

 H 4 — 5. Limacina retroversa Fleming. 

 * 6 — 7. Limacina cochlostyloides, n. sp. 

 » 8 — 10. Clio australis (d'Orbigny). 



(Fig. 10 represents a transverse section of the shell near the 

 aperture; d dorsal, v ventral side). 

 , 11 — 13. Clio sp. {^halantium Rang). 



(Fig. 13. Same significance as in fig. 10). 



Note* from the Leyden iMuseum , Vol. XXIX. 



