MOLLUSC A. 317 



Gastropoda {continued). 



Branchiopneusta. 



Lymnreus, Plauorbis, Auricula. 

 Nephropneusta. 



Helix, BuUmus, ClausiUa, Limax, Arion. 



Ptei'opoda.* 



Theoosomata. 



Hyalea, Cleoilora, Chreseis, Cymbulia. 

 Gymnosomata. 



Clio, Pneumoclermon. 



Cephalopoda.t 



Teti'abi'anchiata. 

 Nautilus. 

 Dibranoliiata. 

 Decapoda. 



Spirula, Sepia, Sepiola, Loligo. 

 Octopotla. 



Octopus, Tremoctopus, Eleclone, Argonaiita. 



Bibliography. 



CnviT'.B Memnires pour servir a I'histoiro et u I'anatomie des Mollusques. Paris, 1817.— Van 

 Beneden, Exercices zontomiques. Fasc. I. II. Bruxelles, 1S39.— Qdot and G.vimaed, Voyase 

 de 1' Astrolabe. Zoologie.— Dellb Chia.ie, Descrizione e notomia degli animah mvertebrati della 

 SicQia oiteriore. Napoli, 1»11-M.—Souleyet, Voyage de laBonite. Zoolog. T. II. Pans, 1852.— 

 Lkuckaet, R , Zoolog. Untersuch. III. Giessen, 1851.— Gegenbaur, C, Unters. ub. Pteropoden 

 u Heteropoden. Lefpzig, 1855.— Keohn, A., Beitr. z. Entvv. d. Pteropoden u. Heteropoden. 

 Leipzig I860.— liAWKESTEK, Rat, Coutrib. to the develop, of the MoUusca. Philosoph. Transac. 

 1875.— V. Jherihg, Vergleichende Anatomie des Nervensystems u. Phylogeme der MoUusken. 

 Leipzig, 1877. 



Placopbora : V. Midbendorff, Anat. V. Chiton. Mem. Acad, de St. Petersbourg. VI. vi. I3i9.— 

 LOTEN, S., Ofvers. K. Vet. Acad. Forhand. Stockholm, 1S55. (Arch. f. Nat. 1856.) 



Lamellibranchiata : Poli, Testacea utriusque Siciliae eorumque historia et anatome. III. Tom 

 1791-1795 — BojANUs Ueber die Athem- und Kreislaufwerkzeuge der zweischahgen Muscheln. 

 Isis 1819' 1820 1827.— Deshates, Art. Conchifera in Todd's EncyclopaicUa, Vol. 1. 1836.— Garnek, 

 On the anatomy of the lamellibranchiate Conchifera. Transact. Zoolog. Soc. London. Vol. II. 

 1841 -QuATREFiGES, Anatomie von Teredo. Ann. des sc. nat. III. xi.— Lov£jf, S., Bidrag tdl 

 kamiedomen om utvecklingen of Moll, acephala. Kongl. Vetensk. Acad. Handl. Stockholm, 

 1850 — Keber Beitrage zur Anatomie und Physiologie der Weichthiero. 1851.— Davaise, C, Sur 

 I'l a-'enerat des Huitres. Paris, 1853.— V. Hesslino, Die Perlmuscheln. Leipzig, 1859.— Lacaze- 

 DuiHiERS 'Anatomie von Anomia. Ann. sc. nat. IV. ii.— L. Vaillant, Sur la fain, de Iridac- 

 nides. Ann. sc. nat. V. iv.— Sabatiee, A., Etudes sur la moule commune. M(?m, de I Acad, des 

 Sc. de Montpellier. 1877. 



Scaphopoda : Lacaze-Ddihiers, Hist. nat. organis. developpement, etc. du Dentale. Paris, 1853. 



Gastropoda- NoHDirA>-if, Monographie des Tergipes Edwardsii. M^m. de I'Acad. Imp.?riale de 

 St mersbourg IV. 18i3.— Alder and Hancock, Monograph of the British Nudibranchiate 

 MoUusca Ray Soc. I.— VII. 1845-55.— Hancock and Embleton, On the Anatomy of Eolis. 

 Ann and Mag. of Nat. His. XV. 1845.— The same. On the Anatomy of Dons. Phil. Trans 1852. 

 Pt II —Hancock, Anatomy of Doridopsis. Trans. Linn. Soo. XXV.— Leydig, Ueber Paludma 

 vivipara Zeitsclir. f. wiss. Zool. II.— Huxley, On the morphology of cephalous MoUusca. 

 Phil Trans 1853 — Bebgh, Bidrag til en Mouographi of Marseuiaderne. Kongl. dansk. 

 Vide'nsk Selsk Skrifter. 1853.— The same, Auatomisk Undersogelse of Fiona atlantica. Vidensk. 

 Meddelei'ier for 1857.— The same, Anatomisk Bidrag til Kundskab om Aeolidierne. Danske 

 Videnskab. Selskabs. Skrifter. 1804.— The same, Bidrag til en Monograph! of Plem-ophyUidierne. 

 Natui-hist. Tidsskrift. 3 Riikke. 4 Bind. 1860. -The same, Bidrag til en Monographi of Phylli- 

 dierne. ebend. 5 Bind. 1809.— The same, Malacolog. Untersuch. Heft. I.— X. Wiesbad. 18/0-70. 

 — Clapaeede, Anatomie und Eutwickelungsgesch. der Neritina fluviatiUs. Arch. f. Anat. 18o7. 

 —The same Beitrage zur Anat. des Cyclostoma elegaus. ibid. 1858.— Lacaze-Duthiebs, Anatomie 

 du Pleurobranche. Ann. nat. sc. IV. xi.-The same, Anat. et I'Embryogenie des Vermets. 

 Ann so nat IV. xiii.— Lawson, Anat. etc. of Limax maximus. Quart. Journal of Micr. be. 

 1803 "—FoL, H., Sur le developpement des Heteropodes et des Gast^ropodes pulmon(?es. Comptes- 

 rendus. T. LXXXI. Nos. 11 et 13. Ai-cliives de zoologie. T. V. 



* In many points of tlieir organisation the Pteropoda indicate a relationship to the 

 Cephalopoda, but this can only be regarded as a very distant one. 



+ Most of the oldest fossil forms probably belonged to the Tetrabranchiata, which 

 are represented by only one extant genus ; at the same time these fossil forms varied 

 greatly ill character. 



