274 BIBLIOGRAPHY OF 1876. 



Sagemon Beck., Mesodon major 'Qirxn., Aglaja fidelts Gray, Arionta 

 Mormonum Pfr , A. seqiioicola J. G. Cooper, A. Calif 0f7iie7isis 'Lea., 

 A. Dupetithouarsi ]3esh., Glyptostoma Neii'herryaiiiim W. G. B., 

 Bulimuhis Donnani W. G. B., B. Edwardsi Mor. and Siiccinea 

 ovalis Gould (not Say), have their details figured and noticed. 



Vanden Broeck ( ) — Biographical notice of 



Gustave Collin. — Bull. des. Seances, Soc. Mai. Belg., 1876, 

 pp. xl. to xliv. 



M. Collin was born at Brussels in 1853, and attached 

 himself specially to the study of Limnceidiz, for a monograph of 

 which he accumulated a large amount of material, which after his 

 death in 1876 passed into the possession of the Belgian Malaco- 

 logical Society. A list of his papers is given by M. Vanden 

 Broeck. 



Brooks (W. K., Ph.D.) — Embryology of Salpa. — Proc. 



Boston Soc. Nat. Hist, 1876, xviii., pp. 193 to 199 and plate. 



Brooks (W. K., Ph.D.)— The Affinity of the Mollusca 

 and Molluscoida. — Proc. Bost. Soc. Nat. Hist., 1876, 

 xviii., pp. 225 to 236. 



The author enters at some length into the discussion of 

 various proposed arrangements, and dissents from Prof Huxley's 

 view of the distinct and annelidian ancestry of the Pteropoda and 

 Dentaliuin, as introducing a difficulty as great as that which it 

 removes. 



Clessin (S.)— Species versus Varieties.— Was ist Art, was 

 Varietat?— Jahrb. Deuts. Mai. Ges., April 1876, iii., pp. 155 

 to 161. 



J.C, ii., Sept., 1S79 



