23 Moll. 
Titles. 
2200 
Newton, R. Bullen and Smith, Edgar 
A. On the survival of a Miocene 
Oyster in Recent Seas. Rec. Geol. 
Surv. India 42 1912 (1-15) 8 pis. 424 
[Nifantov, A.] HmfjaiiTOB'i,, A. Ma- 
Tepiajiu kt> H3yueHijo c|)ayHLi fleBOH- 
ckhxt> oTJioaceniii bt> My ro^/KapcKH xt> 
ropaxTb. [Beitrage zum Studium der 
Fauna des Devons der Berge von 
Mugodjary.j Tomsk Izv. technol. Inst. 
21 1911 (1-33 + deutsch. R6s. 34-36) 
3 Taf. f 425 
Nylancler, Olof 0. Lymriaeidae of 
Aroostook County, Maine. Nautilus 
Boston Mass. 25 1912 (107-108). 426 
Odhner, Nils. Morphologische und 
phylogenetische Untersuchungen uber 
die Nephridien der Lamellibranchien. 
Zs. wiss. Zool. Leipzig 100 1912 (287- 
391). 427 
Odhner, Nils. Northern and Arctic 
Invertebrates in the collection of the 
Swedish State Museum (Riksmuseum). 
V. Prosobranchia. 1. Diotocardia. 
Stockholm Vet.-Ak. Handl. 48 No. 1 
1912 (1-93) 7 pis. 428 
Oldham, Charles. Note on a colour 
mutation in Hyalinia Helvetica, Blum. 
J. Conch. Leeds 13 1912 (312). 429 
Oldham, Charles. Pisidium lillje- 
borgi, Clessin and other Pisidia in 
Carnarvonshire. J. Conch. Leeds 13 
1912 (353-354). 430 
Oldham, Charles. Report on land 
and freshwater mollusca observed in 
Hertfordshire in 1910. Hertford 
Trans. Nat. Hist, Soc. 14 1912 (287- 
290). 431 
Oppenheim, Paul. Bomerkungen zu 
Charles Depdrct ot F. Roman „Mono- 
graphio des Pcctinid^s neog&nes de 
1’ Europe et des regions voisines**. 
II. Genre Flabellipecten (Suite). Cen- 
tralbl. Min. Stuttgart 1912 1912 14 
(425-436). 432 
Oppenheim, Paul. Neue Beitrage 
zur Eozanfauna Bosniens. Wien Beitr. 
Pal. Geol. OstUng 25 1912 (87-149) 
pis. x-xvii. 433 
Ortmann, Arnold E. A monograph 
of the Najades of Pennsylvania. Pitts- 
burg Pa. Mom. Carnegie Mus. 4 1911 
(279-347) pis. lxxxvi-lxxxix. 434 
Ortmann, Arnold E. Notes upon 
the families and genera of the Najades. 
Pittsburg Pa. Ann. Carnegie Mus. 8 
1912 (222-365) pis. xviii-xx. 435 
Ortmann, A. E. Cumberlandia, a 
new genus of Naiades. Nautilus 
Boston Mass. 26 1912 (13-14). 436 
Ortmann, A. E. Lampsilis ven - , 
tricosa (Barnes) in the Upper Potomac 
Drainage. Nautilus Boston Mass. 26 
1912 (51-54). 437 
Ortmann, A. E. The anatomy of 
the Najad Ilyridella australis (Lamarck) 
(= Diplodon australis). Nautilus 
Boston Mass. 25 1912 (100-103). 438 
Ortmann, A. E. and Walker, Bryant. 
A new North American Naiad. Nau- 
tilus Boston Mass. 25 1912 (97-100) 
pi. 439 
Orton, J. H. An account of the 
natural history of the Slipper-Limpet 
( Crepidula fornicata). With some 
remarks on itd occurrence on the Oystor 
Grounds of the Essex Coast. Plymouth 
J. Mar. Biol. Ass. 9 1912 (437-443). 
440 
Orton, J. H. The mode of feeding 
of Crepidula, with an account of the 
current-producing mechanism in the 
mantle cavity, and some remarks on 
the mode of feeding in Gastropods 
and Lamellibranchs. Plymouth J. 
Mar. Biol. Ass. 9 1912 (444-478). 441 
[Ostroumov, A.] OcipoyMOB'i,, A. Kt> 
BapianioHHoft cTaTncTHKkKacniiicKHX'B. 
flHAaKHii/Tb. [Zur Variationsstatistik 
der Kaspischen Didacniden.] Kazan! 
Trd. Obs6. jest. 44 4 1912 (1-28). 442 
Overton, H. On the occurrence of 
Clausilia dubia, Drap., in Kent. J. 
Conch. Leeds 13 1912 (276). 448 
Overton, H. vide Foxall, W. H. 
Oyen, T. A. The quaternary seotion. 
of Kilebu. Kristiania Skr. Vid. selsk. 
1912 1912 No. 8 (1-24). 444. 
Pallary, Paul. Description de 
quelques Melanopsis nouveaux ou peu 
connus du Maroc. Alger Bui. soo. 
hist. nat. 1911 1911 (127-134). 445 
Pallary, Paul. Etude sur quelques 
Melanopsis du Sahara et de la Tunisie. 
Alger Bui. Soc. hist, nat, 4 1912 
(1-9) pi. 446 
Pallary, Paul. Listo des Mollusques 
marins des c6tes d6 la Syrie. Feuille 
jeunes Natural. Paris 42 1912 (171— 
174). 447 
