24 PROCEEDINGS OF THE CALIFORNIA 
118). It was also found several years ago by Mr. Rowell, at Haywards, also 
in Alameda Co. I have not found it there, where, however, occur the following 
mollusea: HeliaCaliforniensis, typical, H. (var.) infumata, Triodopsis loricata, 
Mace. concava, and all the species without shells common to California. 
Punctum pygmeum Drap. This most minnte of our species has 
lately been found, also, near Haywards, by Dr. Yates. 
Suecinea lineata W. G. Binn. The specimens from Mojave River 
mentioned by me in Vol. IV, p. 151 as probably S. rusticana Gld., are more 
likely to be lineata, as I found this west of the first locality along Santa 
Clara River, down to within 8 m. of San Buenaventura. The animal is 
yellowish-white, paler beneath, eye-tentacles dark, with a dark line running 
back in the animal’s head from each. Shell honey-yellow, thick enough to 
hide the colors of animals. 
S. Sillimani Bland. The Mojave R. specimens mentioned with the 
above as S. NVuttalliana Lea, are probably the present species for the reason 
just mentioned, this having been found by me in the same swampy thickets. 
The animal is quite different from that of the last, being lead-color, paler 
beneath, but showing also the dark lines in and behind tentacles. The shell 
is greenish, and so thin that the viscera show through it, but is nearly always 
so encrusted with mud as to partially conceal it. I have noticed the same 
habit in S. Stretchiana, the mud being evidently plastered on in ridge-like 
layers by the animal itself. 
Hyalina arborea Say. Not rare with the Succineas, the only place 
where I have found it near the level of the sea in Southern California. Con- 
stant moisture and summer fogs, are found in few other locations southward. 
Genus Propuysaon Bland & Binney, 1873, type ‘‘P. Hemphilli’’ B. & B., 
Ann. N. Y. Lye. X, 293-297, Pl. XIII. 
The authors remark that they had only compared alcoholic specimens with 
my description and figure of ‘‘ Arion Andersonii’’ (Proc. Phil. Acad. 1872, 
148, pl. III, f. F). I have compared their description and figure with alcoholic 
specimens of my species, and find that the differences mentioned by them 
are caused chiefly by the contraction by the alcohol. The distinct locomotive 
disk, minute caudal pore, and position of generative orifice, all become changed 
as described bythem. The jaw figured by them differs only in being immature, 
and in some of the ridges being consolidated, thus showing eight single and 
six double ones, making twenty, as given by me. 
This difference, with other possible distinctions in color in fresh specimens, 
may be sufficient to separate their species by the name of P. Hemphilli. Mine 
is, however, of the same genus, and though I had before suggested a name 
for it in Mss., I am willing to adopt Prophysaon Andersonii. It is not unlikely 
that the Oregon animal may be the ‘‘Avion foliolatus’’ Gld., still imperfectly 
known. My species is common in winter along the large creeks east of San 
Francisco Bay. 
Ariolimae-Californicws Cp. In the dry season these animals 
crawl down into deep fissures made by the sun in some soils, or hide on the 
northern exposure of catons on streams, in cellars, etc., where some can be 
