v 
ACADEMY OF SCIENCES. 23 
San Diego. Mr. Hemphill also informs me that he collected it in Idaho, thus 
approaching the range of allied polygyrella. 
Genus Patuna Held. Type ‘‘ H. radiata Penn.”’ (or ‘ H., alternata Say.,”’ 
teste Gray, Genera. ) 
This genus was founded on one of the group of ‘‘ Anguispira’’ Morse, a name 
used by me in the ‘‘West Coast Helicoid Land-Shells,’’ but according to Bland 
& Binney includes also P. Hornii’’ Gabb, and striatella Anth., with var. 
Cronkhitei Newc., though not the others I included in it. 
P. solitaria Say. Compare ‘‘ Helix Kochi’’ Pf. Monog. I, figured by 
Reeve, Icon. Pfeiffer places them close together, but the habitat was unknown. 
If the collector was the Dr. Koch of ‘‘Sea Serpent’? fame, he no doubt 
collected it in Osage Valley, Western Missouri, where he exhumed Mastodon 
bones. The figure looks like one of the varieties of solitaria. 
Patula pauper Moric. (not Gould) Alaska. ‘‘Helix ruderata’’ Stearns, 
Proc. Cal. Acad. III, 384 (mot of Studer). ‘* Patula ruderata ?’’ Cooper, 
Amer. Journ. Conch, V, 202. 
Genus Macrocycuts. The animal of the tropical type of this genus seems 
to need comparison with the northern forms. By strict rules, the name 
Mesomphix belongs to this group, the type being plainly concava, as shown 
by Ferussac. 
Me? “Helix” Beicheri Pfeiff. 1, Reeve, Icon. Compare this with 
the Alaskan form called ‘‘ Vancouverensis,’? but which seems different. The 
locality of Belcher’s specimen was unknown, but he visited that coast. 
M. Voyana Newe. Found rarely in Alameda County, by Dr. Yates and 
H. Hemphill, common and large near §. Diego. The animals show the fol- 
lowing differences: 
1. Alameda Co. Dusky white, back purplish-brown, a distinct dark stripe 
on each side, running back from base of eye-peduncles, which are whitish- 
brown. 
2. San Diego. Yellowish-white, middle of back, stripes and tentacles all 
pale slaty. 
3. San Francisco specimens (called ‘‘ Vancouverensis’’) are darker yellow 
than the last, with no central or dark stripe. They thus agree closely with 
the description of the animal of A. concava by Dr. Binney, but differ much 
from that of Oregon Vancouverensis as described by him and by Dr. Newcomb, 
in Amer. Journ. of Conch. Vol. I. 
The animals of Alaska specimens, with a greener shell, are paler than all 
the others. 
M. Durantii Newe. = Patula Durantii of former papers. According to 
Bland & Binney this little species shows the same disregard for generic 
uniformity of size seen in Patula, Zonites, Hyalina, etc., and makes the terminal 
member of the series ou this coast represented by three or four species, regu- 
larly diminishing in size. 
I have lately found it in one spot (on limestone only), two miles from 
Oakland, so that its name, from the late President of the University of Cali- 
fornia, is more appropriate than when given (see these Proceedings, ITI, 
