MOLLUSC A. 245 
Monorondylca mnrdincmis, Lea, Proc. Acad. Nat. Sc. Philad. 18G4, p. 28G, 
from the Eiver Mardin, a tributary of the Tigris. 
Anodontn, M. Bourguignat, Malac. Alger, v., has figured the following 
species: A. lucasi (Desh.), pi. 23 (typ. specimen), and pi. 24. fig. 1 (var.) ; 
A. numidica (Bourg.), pi. 24. figs. 2-6 ; A. emhia (Bourg.), pi. 25, and pi. 26. 
fig. 1 ; A. letourneuxi (Bourg.), pi. 26. figs. 2-6. 
Anodonta tunizana, Morelet, Joum. Conch. 1864, p. 166, from Calle in 
Algeria. 
Mytilidje. 
Crenella injlata, Carpenter, Ann. & Mag. Nat. Hist. 1864, xiii. p. 313, from 
Cape St. Lucas, California. 
Adula (Adams), subgenus of Modtola, characterized by Carpenter, ibid, xiv, 
p. 424 j A. slylina, Carpenter, 1. c., from Monterey, &c. 
Dreissenidas. 
JDreissena polymorpJia. On its migration, see p. 191. 
Aviculid^. 
Meek, F. B. Remarks on the family Pteriidce— Aviculida , with 
descriptions of some new fossil genera. Sillim. Amer. J ourn. 
Sci. and Arts, 1864, vol. xxxvii. p. 213, 
Although this memoir treats on fossil shells, we may mention 
it here, as tlic following new arrangement refers to recent as 
well as to fossil genera : — 
a. PteriniiruB or Pterinia-groupj without recent representative. 
b. Pteriince or Amcidinm\ Pteiia (Scopoli, VnQ) = Avicula (Brug. 1789), 
Margaritifera, Malleus. 
c. Melmince : Crenatula, Melina^ Perna (Brug.). 
As rrgards Pinna, the author is inclined to form for it a separate family, 
which would include, besides Pinna, Atrina and the fossil Trichites. 
Bryophila, g. n.. Carpenter, Ann. k Mag. Nat. Hist. 1864, xiii. p. 314, “like 
a minute Pinna, or a transverse Margaritophora,''^ viviparous, — B. setosa. Car- 
penter, I c., from Cape St. Lucas, California. 
Order OSTRACEA, Cuv. {Pectmaceay Ad.) 
Arcid;e. 
Axhuea (? septentrionalis, var.) suhohsoleta. Carpenter, Ann. & Mag. Nat. 
Hist. 1864, xiv. p. 425, from the Vancouver district. 
Kitcida har’tvigiana, Dohrn, in Pfr. Mai. Blatt. 1864, p. 67, from New Zea- 
• land ; allied to N. pisum. 
Pectinidae. 
Pecten multisquamatusy Bunker, in Pfr. Mai. Blatt. 1864, p. 100, from Cuba, 
