THE NAUTILUS. 143 



be considered worthless, the present ones were so manifestly of tliis 

 same species that they may be regarded as a confirmation of it. 

 They are rather like the Mountain Lake mussels in shape, but some- 

 Avhat larger, and somewhat more inflated than the Turkey Lake 

 form. It appears that tlie comparatively numerous, strong, mostly 

 dark lines of growth and the fine (hs compared with those of other 

 species), sharp, crowded striae are characteristic and, combined with 

 surface appearance and color, let specimens be recognized at a glance. 

 Specimens of the tyi^e lot are in the Museum of the Geo!. Survey 

 of Lidiana and in the Carnegie Museum, Pittsburgli (No. 5465 of 

 my collection of Sphceriidce), in the collection of Mr. Bryant Walker 

 and the Mus, Acad. N, Sc. Phila. 



PUBLICATIONS RECEIVED. 



Kky to the Genera of Gastropoda of Michigan. By H. 

 BuRRiNGTON Baker. (Reprint from the llih Rept. Mich. Acad. 

 Sci., 1900, pp. 134-140.) 



Descriptions of Nine Species of Ennea and Five Heli- 

 coius FROM South Africa. By James Cosmo Melvill and 

 John Henry Ponsonby. (Ann. Mag. Nat. Hist., vol. 4, ser. 8, 

 pp. 485-492, pi. 7, 1909.) 



Report on the Marine Moi.lusca Obtained by Mr. J. 

 Stanley Gardner, F. R. S., Among the Islands of the 

 Indian Ocean in 1905. By James Cosmo Melvill. (Trans. 

 Linn. Soc. London, XIII, pp. 65-138, pi. 5, 1909.) About 170 

 species are recorded of which 15 are new to science. 



MOLLi:SCA FROM THE HOPE ISLANDS, NORTH QUEENSLAND. 



By C. Hedley. (Proc. Linn. Soc. N. S. Wales, 1909, vol. 34, pp. 

 4*20-466, pis. 36-44.) An interesting paper treating of a rich and 

 varied fauna. The Hope Islands are situated near Cooktown, just 

 inside the Endeavor Reef. Tlie writer states that moi'e tl;an 700 

 species were secured; 100 species are discussed in tliis paper, half of 

 which are new to science. The figures are unusually fine in detail 

 and sculpture. 



Dkscriptions OF New and Notes on Other Australian 

 PoLYPLACOPHORA. By C. Hedlky and A. F. Basset Hull. 



