36 THE NAUTILUS. 



GENERAL NOTES. 



Bifidaria armifera var. nov. nridosensis Shell only 4 mm. long, 

 with the two outer teeth a considerable distance within the aperture. 

 Three specimens collected by Mr. C. M. Barber in the nest of an ant 

 {Poyonomyrmex) at Blackwell's Ranch, Ruidoso, New Mexico, Oct. 

 10, 1898, together with Succinea avara, Cochlicopa lubrica, ffelico- 

 discus lineatits, Vitrea inde)itata, Zonitoides arboreits, Leucochetla fat- 

 lax and Vallonia gracilicosta. The shells have quite a distinct ap- 

 pearance, and the locality is a long way from the ordinary range of 

 B. armifera. Dr. Sterki, to whom I sent a specimen, says he has 

 known the form for many years, and has seen it from Kansas, Mis- 

 souri and Minnesota ; he also states that he has seen true armifera 

 from Mexico T. D. A. COCKERELL. 



The collection of the late H. D. Van Nostrand has been acquired 

 by Columbia University, New York, where it will be suitably dis- 

 played S. R. R. 



Among other interesting forms described by Professor Ralph Tate 

 in tin; last volume of the Trans. Royal Society of South Australia, 

 are five species of the curious genus Philobrya, from the tertiary and 

 recent faunae of Australia and New Zealand. The genus is referred 

 to the family Mytilidce by Tate, who gives a list of all the species 

 now known. Though the shells are so small, the genus should be 

 easily recognized by the peculiar spreading embryonic shells perched 

 at the apices of the valves. 



A NEW SPECIES OF PRISTILOMA Mr. E. G. Vanatta has re- 

 cently described, with a figure, a new Pristiloma (P. pilsbryi) from 

 Portland, Oregon. The summits of the whorls are nodulous " very 

 much like Macrochlamys diadema Ball." (Proc. Acad. Nat. Sci. 

 Phila., 1891).) 



Another new form has recently been described by Mr. Pilsbry as 

 Prlstiluiiia Tuylori, types having been collected by the Rev. Geo. 

 W. Taylor at Nanaimo, Vancouver Island. The Pristiloma arctica 

 of Lehnert, from Point I'arrow, Alaska, is also figured in the same 

 paper (Proc. Acad. Nat. Sci., Phila., 1899), and a key to the known 

 species of the genus is given. 



A NE\V VARIETY OE PULYGYKA MONOOOX. P. monodon frier- 

 soni: Shell large, alt. 7, greatest diam. ]()! mm., differing from the 

 typical form in having 6^ whorls or over, which are more closely 

 coiled and narrower in consequence of their greater number ; base 

 very convex, strongly swollen around the deep axial excavation ; 

 perforation very narrow and oblique. From Frierson, La., collected 

 by Mr. L. S. Frierson. H. A. PILSBRY. 



