186 AMERICAN JOURNAL 



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

 Klister, are made synonyms. 



A. imrpurea^YoX. A. Burroughiana, subcrassa, tenuis, crepera, 

 and gracilis, and Unio Bengalensis, 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. 



Pseudodon Vondemhuschiana, Lea, A. Zollingeri, Mousson, 

 and Mo7iocond. Cumingi, Lea, are considered synonyms. 



Pseud, crispata, INIousson, 3Ionocond. pla^iulata. Lea, and M. 

 fragilis, Klister, 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 Museheln des oberen Nilgebietes. By Dr. Ed. 

 VON Martens. 



Unio Abyssinicus, Martens. Abyssinia. 

 Unio tricolor, Kiister ? " 



Kritisehe Uebersicht aller Arten der zur G-attung Venus 

 gehorenden Untergattung Cryptogramma. By Dr. Edw. 



BoMEK. 



Kritisehe Uebersicht aller zum sub-genus Chione gehorenden 

 Arten von Venus. By Dr. Edw. Romer. 



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

 tfie synonymy worked out and diagnoses corrected. 



Neuer Bulimus. By E. von Martens. 



B. involutus. Martens. Brazil. 

 Eine neue Helix. By Dr. Louis Pfeiffer. 



H. revoluta, Pfr. Andaman Islands. 



Deseriptio brevis molluscorum quorundam terrestrium, a cla- 

 rissimo viro Anto7iio Raimondii Peruvia lectorum. By 

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



