48 THE NAUTILUS. 



reserved for the memoir a synopsis of the arrangement adopted has 

 been given in this pamphlet, which deals with the families of 

 Cyrenidae and Spheeriidae. 



In the Cyrenidae. twenty-tliree proposed genera, subgenera and 

 sections are listed and type specimens with synonyms are given; 

 to these Dr. Dall has added one new genus and four new sections. 

 Of the genus Donacopsis Sandberger, 1872, he says: "1 suspect 

 tliis to be merely a subdivision of Cyrena." 



Of the family Sphcerh'dce fourteen genera, subgenera and sections 

 are listed with type specimens. Section Cyc/ocalyx, subgenus 

 Cymatocyclas, and subgenus Tropidocyclas are new. The three 

 types are Pisidium scholtzii Clessin, P. compressiwi Prime, and P. 

 henslowianum Sheppard. 



" Pera Leach, and Euglesa Leach, 1852, are synonymous with 

 Corneocyclas s. s.," and Galileja Costa; Kuglesia Leach, 1840; 

 Pisum Gray, 1847, not Megerele, 1811 ; Cordida Leach; Fluminina 

 Clessin ; Cycladina Clessin, and Rlvulina Clessin, are, according to 



Dr. Dall, not separable from Pisidium. s. s Mrs. M. Burton 



Williamson. 



Land Shells of Curacao. — Li Mr. Smith's useful review of 

 tlie land shells of this island (Proc. Malac. Soc, London iii, 113) 

 several species seem to have been overlooked: Cionella gloynii nnd 

 Succinea gyratn, both described by Gibbons in the Journal of Con- 

 chology n, pp. 135, 136, plate I, Steaogyra octonoides, Pupa fallax, 

 and DrymcBus multilineatus noticed on p. 136; also Man. Conch. 

 XIII, p. 29. Perhaps Cionella gloynii belongs to Mr. Smith's group 

 Neosicbulina. Another species, " Macroceramus inermis Gundl.," 

 is also reported. The dentition of some of these specimens has been 

 examined by Binney, and proves to be like that of J/, gossei, so that 

 the Cura9ao shell is a member of the genus Microceramus. It is no 

 doubt distinct from the East Cuban Mac. inermis, and may be re- 

 lated to or identical with Pineria boiiairensis Smith. The latter is 

 probably a Microceramus, but I have not seen specimens. Mr. Gib- 

 bons' note adds six s|)ecies to the fauna of Cura9ao, raising the total 

 number now known to twelve. — H. A. Pilsbry. 



