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 

 Cyrenidse and Sphseriidse. 



In the Cyrenidse twenty-three 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: "I suspect 

 tliis to be merely a subdivision of Cyrena." 



Of the family Sphceriidce fourteen genera, subgenera and sections 

 are listed with type specimens. Section Cyclocalyx, subgenus 

 Cymatocyclas, and subgenus Tropidocyclas are new. The three 

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

 henslowianum Sheppard. 



" Per a Leach, and Euglesa. Leach, 1852. are synonymous with 

 Comeocyclas s. s.," and Gulileja Costa; Kuglesia Leach, 1840; 

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

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

 Dr. Dall, not separable from Pisidium s. s. MRS. M. BURTON 

 WILLIAMSON. 



LAND SHELLS OF CURACAO. In Mr. Smith's useful review of 

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

 several species seem to have been overlooked : Gionella yloynii and 

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

 chology II, pp. 135, 136, plate I, Stenogyra octonoides, Pupa fallax, 

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

 XIII, p. 29. Perhaps CloneUa yloynii belongs to Mr. Smith's group 

 Neosubulina. 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 M. yossei, 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 bonairexsis Smith. The latter is 

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

 bons' note adds six species to the fauna of Curacao, raising the total 

 number now known to twelve. H. A. PILSBRY. 



