24 THE NAUTILUS. 



borrowed from Binney's works. " The study of the influence of 

 altitude upon mollusks in this region has given chiefly negative re- 

 sults. Instead of dwarfing the species, as in Montana and other 

 regions where the cold of high altitudes is more intense, the higher 

 altitudes seem more favorable to land snails than lower levels, be- 

 cause of the increased humidity. The finest specimens of Oreohelix 

 strigosa and Vitrina alaskana found have been at 11,000 and 9,300 

 feet respectively." " Among bivalves we have found Pisidia at 

 11,000 feet, Calyculina at 8,500 feet." 



Regarding some of the older records the author remarks upon 

 " doubts as to the accuracy of identification in many instances in the 

 early reports." Such difficulties are always encountered, and their 

 removal costs much time and labor. The identification of " Zoni- 

 toides conspectus," Succinea salleana, nuttalliana, riisticana, Ancylus 

 fragilis and caurinus and Physa heterostropha should especially be 

 looked into. The paper will form an excellent basis for further 

 work in Colorado, and will be useful for work anywhere in the 

 Rockies. 



The Results of Deep-sea Investigation in the Tasman 

 Sea. Mollusca from eightt fathoms off Narrabeen. By 

 C. Hedlet (Records of the Australian Museum, vi, pp. 283-304, 

 pis. 54-56). This paper contains descriptions of 18 new species, 

 including a new genus, Coriareus related to Lascea. The species are 

 all beautifully illustrated. 



NOTES. 



Errata. — The differences between the two New England species 

 of Acmaea. The Nautilus, May, 1907. About half way down 

 the 3d page: "... radula of an adult shell of alveus are perhaps 

 the squarest of all, fig. 4." This should be " fig. 3." Also several 

 lines farther down "... nearly at right angles to the next tooth 

 and the cusp of (U) faces the center of the lingual membrane (L)." 

 The (L) should be after the word " tooth." 



Henry Jackson, Jr. 



