APPENDIX. 



Since the printing of these Tables was cominencecl, about a year since, the following matter came 

 under my notice, and I have deemed it important enough to put it in this form. 



In the Journal of the Nortli-Chiria Branch of the Royal As^iatic Society for December, 1865, whicli 

 came too late into my hands for notice in its proper place, I find a very interesting article entitled 

 Notes on the " Geology of the Great Plain," by Dr. Lamprey, Surgeon H. M.'s Gtth Pieg't. In the care- 

 ful examination of the district of Shanghai he gives the product of an artesian well, 252 feet deep. 

 Between 45 and 60 from the surface "fragments of shells" were found, and j)lants and bark of a tree at 

 180 feet. In an earth jDit, "land shells and stems of plants" were also found. "Two feet from the surface 

 there were fossil shells of Paludina," &c. p. 11. Further on, p. 14, he says that "remains of shells 

 belonging to Paluclina, Planorhis, Unio, Anodonta, and Cyrena are scattered over the surface of the 

 soil both in Kiang-see and Pe-chi-li, and buried in it at various depths. They are also found " still 

 in a living state." Among the bivalves found he says "I have met with a form (figs. 20 and 21) which 

 appears to be a marine species; it is found in a fossil state in the low swampy ground at the south 

 side of Tien-tsin city," &c. This very remarkable shell is unquestionably Triquetra contorta, Lea : see 

 Obs. on Unio, vol. vi. p. 39, jdI. 33, f. 33, specimens of which I obtained and described in 1857 in the Jour- 

 nal of the Academy of Natural Science as coming from the fresh waters of Northern China, some of my 

 specimens coming from Shanghai. Dr. Lamprey figui-es two other species of Unionidse without specific 

 names. "Auodonta, fig. 14," is Dipsas discoideus, Lea. Obs., vol. i. p. 187. "Unio, fig. 15," is Ujiio 

 Wrightii, Lea. Obs., vol. xii. p. 43. He mentions other specimens, one of- which he says is an Anodonta 

 of "10 by 6^ inches." This is evidently Dipsas pUcatus, Leach. A '■'■Unio 8 inches by 5^" is unknown 

 among Chinese collections, and is probably a more perfect specimen of D. p)licatus. 



A very valuable paper, " Ueber siidbrasilische Land- und Siisswasser Mollusken," bj^ Di'. Ed. von 

 Martens, in Malakoz. Bliitt. 1858, was not in mj- possession in time to place his name after tlie species cited 

 which he there notices. There are twenty-nine species of Unionidse which had been described by Lamarck, 

 D'Orbigny, Spix, KUster, Hup^, and myself, many of which he considers to be synonyms. 



Another valuable memoir came too late to be inserted in the systematic tables : " Beitriige znr Ent- 

 wicklnngsgeschichte der Najaden," by Dr. F. A. Forel, Morges, Switzerland. This is a most able exposi- 

 tion of the development of the Unionidse, giving the histology of the subject, and executed with a 

 minuteness and perfection heretofore unreached as to embryonic development and anatomical exactness. 

 There are three excellent plates with accurate figures of the progress of Maturation of the Ovarian Egg, 

 Segmentation of the Yolk, Bj-ssus organs, &c. 



Revision of the Classification of the Mollusca of Mass. By W. H. Dale Pro. Boston Soc. Nat. Hist., 

 Mar. 16, 1870. 



Mousson. Species described in Mai. Bliitt. 1869, p. 185: 

 Castalia ecarinata. 

 Plagiodon rotundalus. 

 Anodonta Wallisi. 



