THE NAUTILUS. 143 



On Monday, Feb. 27th, I had the honor of submitting the speci- 

 mens, in situ and intact, to Dr. Pilsbry and Mr. Vanatta, of the 

 Academy of Natural Sciences, for verification, and they confirmed 

 the discovery. 



As no record of observed parasitism in America of Glochidia has 

 been made in any scientific journal that I am aware of, it was a 

 great pleasure to find them living, and confirm the observations 

 made in Europe. 



The fish were taken from the most eastern of the three connected 

 ponds at Westville, N. J. 



NOTES. 



Marratt and the Conchologia Iconica. — In the February 

 Nautilus, p. 120, in the extract from " The Museums Journal,"- 

 concerning the late F. P. Marratt, it is stated that he was the author 

 of the monograph on Oliva in Reeve's '' Conchologia Iconica," 

 This is an error which might be corrected if you think it necessary. 



When Lovell Reeve wrote that monograph in 1850, Marratt was 

 unknown as a conchologist. 



Of the " Conchologia Iconica " Reeve was author of Vols. I.- 

 XIV., and as far as Tornatella in Vol. XV. The rest of that vol- 

 ume, commencing with Pyramidella to the end, and Vols. XVI — 

 XX. were the work of the late G. B. Sowerby. — Edgar A. Smith, 

 British Museum (Natural History). 



Note on the Genus Aporema Dall — This group, of which 

 Pholadonya arata Verrill is the type was named in 1903. But I 

 am informed that Aporema was used in 1890, by Scudder, for an in- 

 sect, and the molluscan genus therefore requires a new name. I 

 propose for it Panacea. — Wm. H. Dall. 



Note on Trichodina Ancey. — Inasmuch as the name Trich- 

 odina, proposed by Ancey in 1888 for an Achatinoid land shell (cf. 

 Man. Conch, pt. 67, p. 182) was used in 1830 by Ehrenberg for a 

 genus of Foraminifera, I would propose that it be replaced by 

 Petriola Wm. H. Dall. 



