Index. 
Aviculidae 1 — 10 
Avicula 1 — 9 
,, aculeata Risso 7 
„ aizyensis Resh. 3 
„ aptera Vine. 3 
,, arcuata Soav. 3 
„ arthonensis Cossm. 3 
„ atlantica Brown 7 
„ aviculina Resh. 3 
,, callosa 3, 56 
,, calvimontana Resh. 4 
„ chilensis Phil. 4 
„ claibornensis Lea 6 
,, cosmeta Cossm. 4 
„ Crossei May.-Ey. 4 
,, Refrancei Resh. 4 
„ dertocrassa Sacco 4 
,, Rixoni Resh. 4 
,, ecaudata Sandb. 4 
„ fragihs Resh. 4 
,, fragilis 4 
herouvalensis Resh. 4 
„ hirundo Lin. var. Compa- 
nyoi Font. 4, 5 
„ hirundo Lin. var. phalaena- 
cea Lam. 5 
„ Hoernesi Resh. 5 
„ Lepsiusi Steuer 6 
,, limaeformis Vine. 6 
limula Conr. 6 
„ macro tis Resh. 6 
„ maretensis Vine. 6 
„ media Sow. 6 
microptera Resh. 0 
„ Moloti Cossm. 6 
,, monopteron Guemb. 6 
,, mucronata Vine. 6 
„ orthogonia Vine. 6 
„ papyracea Sow. 6, 7 
„ paradoxa Nyst 56 
perangusta Netschaj. 56 
,, peregrina PoseAV. 7 
„ phalaenacea 5, 6, 7 
,, phalaenoides Wood 7 
Avicula proxima Vine. 7 
,, Riitimeyeri R’Arch. et 
Haim,. 8 
„ stampinensis Resh. 7 
„ Studeri May.-Ey. 7 
,, submedia 4 
,, subquadrangularis Vine. 7 
„ suessiana Noetl. 56 
,, tarentina Lam. 7 • 
„ tarentina Lam. var. Fica- 
razzellensis Re Greg. 8 
,, transitoria Rolff. et Rautz.8 
,, transversa Resh. 8 
,, trigonata Lam. 8 
„ trigonata 7 
,, Wateleti Resh. 8 
„ wemmelensis Vine. 8 
Aviculoperna 3, 4, 6 
Meleagrina 10 
„ Bourgeoisi Tourn. 10 
,, margaritifera 5 
„ sp. 7 
,, Studeri 7 
Mytilus hirundo 7 
Oxytoma 10 
Piimida 11—18 
Pinna 11 — 18 
,, alamedensis Yates 56 
„ affinis Sow. 11 
„ affinis 14 
„ arcuata Sow. 11 
,, aspera Ludw. 57 
„ Brocchii 14, 16, 57 
„ carcarensis Rover. 11 
„ consobrina Vine. 57 
„ costata Phil. 11 
„ crista Opp. 11 
„ denudata Segu. 11 
„ Reshayesi May.-Ey. 11 
„ exanthema Speyer 12 
„ fragilis Wat. 12 
,, hassiaca Steuer 12 
„ helvetica May.-Ey. 12 
