24 Moll. 
MOLLUSCA. 
Toucas, M. A. Etude de la Faune des Couches Tithoniques de l’Ar- 
d&che. Bull. Soc. G6ol. xviii, pp. 5G0-629, pis. xiii-xviii. 
Toula, F. Geologische Untersuchungen im ostlichen Balkan und in 
den angrenzenden Gebieten. Denk. Ak. Wien, lvii, pp. 323-400, 
7 plates. 
Trinchese, S. Richerche anatomiche sulla Forestia mirabilis (Ti\). 
Mem. Acc. Bologn. x, pp. 57-62, plate, 
Tschapeck, H. Ueber das Auftreten der Alinda biplicata und 
ihres Fonnenkreises in Niederosterreich. Nachr. mal. Ges. 1890, 
pp. 49-60. 
Ulicny, Jos. Zweiter Beitrag zur Kenntniss der Molluskenfauna von 
Mahren. Yerh. Yer. Briinn. xxvii, pp. 37-53, 
Ulrich, E. 0. (1) New Lamellibranchiata. No. I. Containing Descrip- 
tions of New Species of Modiolopsis. Am. Geol. v, pp. 270-284, 
woodcuts. 
. (2) New Lamellibranchiata. No. il. On Two New Genera and 
Six New Species. Op . cit. vi, pp. 173-181, woodcuts. 
Ischyrodonta , n. g., Whitella , n. g. 
. (3) New Lamellibranchiata. No. Hi. Descriptions of New Species 
with remarks on others. T. c. pp. 382-389, woodcuts. 
Vayssiere, A. Recherches zoologiques et anatomiqUes sur les 
Mollusques Opisthobranches du Golfe de Marseille. 2 m e Partie. 
Nudibranches et Ascoglosses. Ann. Mus. Marseillej iii, pp. 1-160, 
pis. i-vii. 
Many new species. 
Waltiiisr, J. Ueber eine Kohlen-Kalk Fauna aus dor /Egyptisch- 
Arabischen Wiiste. Z. Geol. Ges. xlii, pp. 419-449, pi. xxiii-xxviii. 
Mollusca , pp. 437-441. Several new species. 
Waters, A. H. Notes on Marine Mollusca in Captivity. 1890, p. 108. 
Westerlund, A. C. (1) Fauna der in der Paleearktischen Region 
lebenden Binnen-Conchylien. i. Supplement. Berlin (Friedlander) : 
1890, 168 pp. 
. (2) Index. “ Allgemeines Register der Fauna der in der Palae- 
arktischen Region lebenden Binnen-Conchylien,” Berlin (Fried- 
lander) : 1890, 128 pp. 
. (3) Katalog der in der Palaearktischen Region lebenden Binnen- 
Conchylien. Suppl. HI. Berlin (Friedlander) : 1890. 
Whitelegge, T. (1) Report on the Worm Disease affecting the 
Oysters on the Coast of New South Wales. Rec, Austral. Mus, i, 
pp. 41-55, pis, iii-vi. 
An account of the ravages caused by Polydora (Leucodore') ciliala. 
The young worms do not bore through the shells of the oyster, but as 
free-swimming larvas are carried inside the oyster by inhalent currents. 
