186 AMERICAN JOURNAL 



Anodonta exilis, Lea. A. polita, Mouss., and A. siUqua, 

 Kuster, are made synonyms. 



A. i3urpurea,\dA. A. Burroughiana, subcrassa, tenuis, crepera, 

 and gracilis, and Unio Bengalehsis, Lea, and Unio verecundus, 

 Gould, are made synonyms. I do not agree to this wholesale 

 synonomy, by any means. The author thinks it not unlikely 

 that U. Bengalensis is from the Philippine Islands rather than 

 from Bengal, but I can assure him that the specimens in our col- 

 lections are from Bengal. 



Pseudodo7i Vondemhuschiana, Lea, A. Zollingeri, Mousson, 

 and 3Ionocond. Oumingi, Lea, are considered synonyms. 



Pseud, crispata, Mousson, Monocond. planulata, Lea, and M. 

 fragilis, Kuster, are made synonyms. 



U. superbus. Lea. U. macropterus, Dunker, is made a syno- 

 nym. 



U. caudiculatus, nov. sp. Borneo, 



U. cucumoides. Lea. U. Cumingianus, Dunker {non Lea), is 

 a synonym. 



Ueber einige Muscheln des obej-en Nilgebietes. By Dr. Ed. 

 VON Martens. 



Unio Abyssinicus, Martens. Abyssinia. 

 Unio tricolor, Kuster ? " 



Kritische Uebersicht aller Arten der zur Crattung Venus ^ 

 geliorenden Untergattung Cryptogramma. By Dr. Edw. 



RoMEK. 



Kritische Uebersicht aller zum sub-genus Ohione gehorenden 

 Arten von Venus. By Dr. Edw. Romer. 



Two valuable papers, in which the species are carefully studied, 

 the synonymy worked out and diagnoses corrected. 



Neuer Bulimus. By E. von Martens. 



B. {7ivolutus, Martens. Brazil. 

 Eine neue Helix. By Dr. Louis Pfeiffer. 



H. revoluta, Pfr. Andaman Islands. 



Bescriptio brevis molluscorum quorundam terrestrium, a cla- 

 rissimo viro Antonio Baimondii Peruvia lectorum. By 

 R. A. Philippi, with appendix by Dr. Louis Pfeiffer. 



