82 THE NAUTILUS. 



NOTES. 



ON THE GENUS HARMANDIA. The genus ffarmandia was 

 proposed by Rochebrune for a couple of nearly related species 

 of fresh-water mussels said to be from the Mekong River, Indo- 

 China. His types were figured by Dr. F. Haas, and their re- 

 semblance to some young Nyria from South America was strik- 

 ing as the writer stated in NAUTILUS. Dr. Haas has critically 

 re-examined the types, and the following excerpt from a letter 

 from him to the writer will be of interest. "I am convinced 

 that the genus Harmandia will have to disappear, being 

 founded upon young Hyria. Rochebrune found the shells in 

 the collections of Count Harmand, and Count Castelnani, both 

 of whom were in Cochin China, as well as in Brazil." Hence 

 the error as to the habitat. L. S. FRIERSON. 



HABITS OF EUPERA. Mr. L. S. Frierson has recently sent to 

 me a fine set of Eupera singleyi (Pils. ), which he collected in 

 the Bayou Pierre, DeSoto Parish, La., with the following 

 note : "The willow trees send out their roots into the water 

 and there grow about a foot long. Their rootlets convert the 

 whole into a mat of moss-like stuff, in which these Euperas 

 grow. They are tied to their habitat by some thread-like bys- 

 sus. ' This is, I believe, the first record of Eupera in Louisiana. 

 BRYANT WALKER. 



VENEZUELA SHELLS, The following species of shells were 

 collected by Mr. Stewardson Brown while on the Bond Vene- 

 zuela Expedition in March, 1911. All the small forms were 

 picked out of several bags of leaf mould. At Cariaquita, Vene- 

 zuela he found, Thysanophora plagioptycha Sh., T. bactricola 

 Guppy. , Strophocheilus oblongus Mull. , Bulimulus cacticolus Rve. , 

 B. erectus Rve. , Drymceus flavidm debilis ' ' Bk ' ' Mart. , Opeas 

 micro. Orb. , 0. beckianus Pfr., 0. octogyra plicatellum Gupp, Lep- 

 tinaria lamellata P. & M., L. simplex Guppy, Streptaxis deformis 

 Fer., I'olita implicans Guppy, Ernstia ernsti Jouss., Guppya 

 gundlachi Pfr., G. semenlini Moric, Radiodiscus millecostata Pils. , 



