2223 



568 



Jensen, A. S. . . . Mya. [Varieties 

 o£ .¥. arenaria and truncata]. (Danish,) 

 Kjobenhavn, Xath. Medd., 1900, 1901, 

 (133-158). 



Nelson, W. Note on breeding 

 Limnaea ■peregra monst. siuistrorsum. 

 Naturalist, London, 1901, (355). 



Weldon, W. F. R. [Variation in 

 Claus'dia laminata (Montagu).] Bio- 

 metrika, Cambridge, 1, 1901, (109- 

 124). 



Substantive Variation. 



Carter, C. S. Albinism in [Pul- 

 monata]. . , . Naturalist, London, 

 1901, (157). 



Collier, E. [Torsional reversal in 

 Jlelieidae.] J. Conch., Leeds, 10, 1901, 



(91). [2227 del 



Headley, F. "\V. [Foreign oysters 

 ticquiring characters of natives]. 

 Nature, London, 64, 1901, (158). 

 [2203]. 



Nelson, W. Reversed Limnaea 



peregra. Naturalist, London, 1901, 

 (216). 



Sterki, V. Nordamerikanische Pisi- 

 dien imd deren Beziehungen zu euro- 

 jjaischen. Frankfurt a. M., NachrBl. D. 

 malakozool. Ges., 33, 1901, (82-86). 

 £2231 2227 g d]. 



Tabor, J. M. [Foreign oysters 

 acquiring characters of natives.] 

 Nature, ' Loudon, 64,^ 1901, (126). 

 [2203]. 



Meristic Variation. 



Baker, F. C. The digitations of the 

 mantle in Fhysa. Chicago, 111., Bidl. 

 Acad. Sci., 2, 1901, (225-228, with pi.]. 

 [2231]. 



Stearns, R. E. C. An abnormal 



chiton [Isclinochiton (Mangerella) 

 conspicuits Cpr., Avith only six valves]. 

 Nautilus, Philadelphia. Pa., 15, 1901, 

 (53-54). [2231]. 



Woodruffe-Peacock, E. A. Helix 

 aspersa nionst. cornucopia. Naturalist, 

 London, 1901, (163). 



EVOLDTION. 



Hescheler, Karl. Ueber die Gattung 

 Pleiirotomaria. Biol. Centralbl., Leip- 

 zig, 21, 1901, (569-582). [2231 2207]. 



Hilgendorf, Franz. Der Uebergang 

 des Planorbis multiformis trocliiformis 

 zum Planorhis multijormis oxystomus. 

 Arch. Natg., Berlin, 67, Beiheft, 1901, 

 (331-346, mit 1 Taf.). [2231 t 



K 90.2231]. 



Kerr, J. Graham. Phylogenetic 

 relationship between Amj^hineura and 

 Cephalopoda. Zool. Anz., LeijDzig, 24, 

 1901, (437-438). [2231]. 



Simroth, St.- [vielmelrr Heinrich]. 

 Ueber die Abhangigkeit der Nackt- 

 schneckenbildung vom Klima. Biol. 

 Centralbl., Leipzig, 21, 1901, (503-512). 

 [2211 2231]. 



Smith, James Perrin. The larval 

 coil of BacuJiies. Amer. Nat., Boston, 

 Mass., 35, 1901, (39-46, with pi.). 



Thiele, Job[annes]. Ueber die phyleti- 

 sche Entstehung imd die Fomientwick- 

 Inng der Molluskenschale. Biol. Cen- 

 tralbl., Leipzig, 21, 1901, (274-277). 

 [2207]. 



2227 GEOGRAPHICAL 

 TRIBUTION. 



DIS- 



Teratological Variation. 



Baker, Frank Collins. Some interest- 

 ing molluscan monstrosities. St. Louis, 

 Mo., Trans. Acad. Sci., 11, 1901, (144- 

 146, with pL). Separate. 24.3 cm. 



Dautzenberg-, Ph. Sur deux defor- 

 mations observees chez des Placostylus 

 de la Nouvelle-Caledonie. J. Conchv- 

 liol., Paris, 49, 1901, (217-218, av. idI. 

 et fig.). [2231]. 



General. 



Pelseneer, [Paul]. Les Neomeniens 

 de r expedition antarctique beige et la 

 distribution geographique des Aplaco- 

 jihora. Tagebl. intern. ZoolCongr., 

 Berlin, 5, 1901, No. 8, (18-19). [2231].' 



Pilsbry, Henry A[ugustine]. The 

 evidence of snails on changes of land 

 and sea. Pop. Sci. Mon., New York, 

 N.Y., 59, 1901, (284-289). [2231]. 



