THE - CONCHOLOGISTS’ - 
EXCHANGE. 11g 
Editor THE CONCHOLOGISTS’ EXCHANGE: 
Sir—Thinking it might be of interest to the read- | 
ers of THE CONCHOLOGISTS’ EXCHANGE, I give you 
herewith the result of one hours collecting at Onset 
Bay, Massachusetts: 
Urosalpinx cinerea, Say, . . 50 specimens. 
fupleuwra caudata, Say,. . . . . 4A : 
Fulgur carica, Gmelin, a, lO 
Sycolypus cunuliculatusy oo 8 “ 
Phrontis vibex, Say, 15 ‘ 
Tritia trimtatta, Say, 50 oa 
Tlyanassa obsoleta, Say, , 50 ee 
Mitrelia lwnata, Say, . 100 i 
Neverita duplicata, Say, 15 ef 
Crepidula conveaxa, Say,. 25 i 
fornicata, Linn,. 30 as 
Litiorina palliaia, Say, 25 S 
Me littorea, Linn, 50 if 
Biltiwm nigrum, Stimp, . .. . 
Triforis nigrocinctus, Adams, . 
Colliselia testudinalis, Mull, . . . 3 
Chetopleura apiculatus, Say,. . . 2 i 
Melampus bidentatus, Say, 20) 
Ensatella Americana, Gould, . . 10 se 
Solecurtus gibbus, Spengler, . . . 5 
Macoma fusca, Say, ; seus B25 re 
Crassivenus mercenaria, Linn, 10 ss 
Mya arenaria, Lind,. . ... 20 “ 
Argina pexrata, Say, 20 os 
They were mostly live specimens. 
Specimens of Mitredla lwnata were very plentifu 
upon the sea-weed, from which I collected them by 
seraping with a small piece of wood, from the sea- 
weed upon a large flat rock, and thence into a small 
bottle. 
The specimens of Phrontis vibex seemed to forma 
small colony, and were only found in a small space 
about one foot square, and nowhere else in the bay. 
Fulger carica and cunaliculatus were very large, 
handsome specimens, averaging from six to seven 
inches in length. 
' Lalso wish to report the finding of a specimen of 
Se ga crispata, Linn, at Newport, R. I., which 
escaped the ever watchful eye of Mr. Carpenter. 
This is the first specimen of Zirphea crispata 
which has tomy knowledge been found in Rhode 
Island; they are found at Nahant Beach, Mass., 
very large and fine; my specimen is a very small 
one, but perfect in every respect. Length, '4 inch; 
height, 5-16 
Providence, R. I., Ap. 23, 1888. F. C. BAKER. 
It is said that Herr Ladewigg, a German, 
has invented a paper that resists the action of 
both fire and water. It is composed of 25 
parts of asbestos fibre, with from 25 to 30 parts 
of aluminum sulphate, after which the mixture 
is moistened with chloride of zine and thor- 
oughly washed in water. It is then treated 
with a solution of 1 part of resin soap in 8 to 
10 parts of a pure aluminum sulphate, after 
which it is made into paper in the usual way, 
| any other county of the United States. 
| Helicinuw oceulta, Say 
day tpauges. 
FREE TO SUBSCRIBERS. 
Terms to NON-SUBSCRIBERS, which must be 
cash with order, are as follows: Exchanges of 20 
words, including address, 10 cents; for each addi- 
tional 10 words the charge will be 5 cents. No ex- 
change will be inserted for less than 10 cents. 
in return for those of 
WM. R. 
San Francisco, 
Shells of San Francisco Co. 
ECKART, JR., 2906 California St., 
Cal. 
Offered.—Land, fresh water and marine shells. 
(recent and fossil) ; Puncium 
Pygmaeum, Drap; Pupa Blandi, Morse (fossil); 
Marg. Hildrethiana, Lea; Acmea testudinalis, Mull; 
ete. ete. 
Wanted—Sirepomatide, Viviparide, 
Pupade, Succinea Corbiculade, 
SHIMEK, Iowa City, Ia. 
Limnaeide, 
Unionidaec.. B. 
Wanted—Land shells of Florida and Texas. 
Offered —50 species of California Marine, 150 
species of Foreign Land and Marine Shells. G. W. 
MICHAEL, cae “Morro, Cal. 
fra- 
trigonus, Lea, Marvaritana complanata, 
JOSEPH 
Oflered.—Unio mate Say, plicatus, Leseuer, 
g6sus, Con., 
Say, and many others. for marine shells. 
AN DERSON, Box 1955, eee ae Mich. 
Offered.—70 species of inland and 50 of marine 
shells for other shelis. Send your list for ours. 
JOHN M. HOLZINGER, Winona, Minn. 
Will exchange a fine set of Agassiz Con. Nat. 
Hist., 4 vols., 4to cloth, for old historieal works. S. 
W. HUMPHREY, Dedbam, Mass. 
A collection of aieniae 50 varieties, for a collec- 
tion of stamps, coins or Indian relics. All letters 
answered. WILL. P. ARNOLD, Shanneck, R. I. 
Offered —Unio lens, subrostratus, Avsopus, dona- 
ciformis, metanevrus, ellipsis, pustulatus, alatus. 
Marg. complanata, marginata rugosa. Anodonta 
fragilis, parvona, piana, grandis (said by Mr. W. A. 
Marsh to be very fine and nearly typical.) Pleuro- 
cera undulatum, troostii, florenceensis. Sph. trun- 
catum. Lists exchanged. A printed list of Hen- 
dricks county shells will be sent on application. C. 
A. HARGRAVE, Danville, Ind. 
Otfered.—300 species land, fresh-water and marine 
shells in exchange for others. Correspond in Vola- 
puk where possible. A. A. HINKLEY, DuBois, Ill. 
