APPENDIX 



Since the printing of these Tables was commenced, 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 North-China Branch of the Royal Asiatic Society for December, 1S65, which 

 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 Reg'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 plants and bark of a tree at 

 180 feet. In an earth pit, "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. 11, he says that "remains of shells 

 belonging to Paludina, Planorbis, 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, pi. 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 figures two other species of Unionidee without specific 

 names. "Anodonta, fig. 14," is Dijjsas discoideus, Lea. Obs., vol. i. p. 1ST. "Unio, fig. 15," is Unio 

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

 of "10 hy 6? inches." This is evidently Dipsas jjlicatus, Leach. A '■'•Unio 8 inches by 5j" is unknown 

 among Chinese collections, and is probably a more perfect specimen of D. plicatus. 



A very valuable paper, "Ueber siidbrasilische Land- und Siisswasser Mollusken," by Dr. Ed. von 

 Martens, in Malakoz. Blatt. 1858, was not in my possession in time to place his name after the species cited 

 which he there notices. There are twenty-nine species of Unionidat which had been described b}' Lamarck, 

 D'Orbigny, Spix, Kiister, Hupe", and myself, many of which he considers to be synonyms. 



Another valuable memoir came too late to be inserted in the systematic tables: "Beitr-ige zur Ent- 

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

 tion of the development of the Unionidee, 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 E™, 

 Segmentation of the Yolk, Byssus organs, Sec. 



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

 Mar. Ill, 1870. 



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

 Castalia ecarinata. 

 Plagiodon rotundatus. 

 Anodonta Wallisi. 



