— 351 — 
The Nautilus, a monthly devoted to the interests of 
Conchologists. Editors : H. A. Pilsbry and C. W. Johnson. 
Vol. XXIII, n° 2, June 1909. 
Contents : V. Srerki. Some observations and Notes on Muscu- 
lium. — F. C. Baker. Description of a New Fossil Lymnæa [L. 
nashotahensis m. sp., Wisconsin]. — Bryanr WaLker. Notes 
on Planorbis, IL: P. bicarinatus (PI. IT et III). — Notes : H. A. 
PizsBry, An internal septum in Holospira Bartschi. 
Vol. XXIII, n° 3, July 1909. 
Contents : Fr. N. Baccu. A Spring Collecting Trip : Notes on 
New England Nudibranchs, II [Coryphella rufibranchialis choco- 
lata m. var.]. — H. W. WixkLey. New England Pyramidellidæ, 
with Description of a New Species [Pyramidella (Sulcorinella) 
Bartschi nm. sp.. Mass.] (fig.). — Harozp HanniBaz. A New 
Carinifex from the Santa Clara Lake Beds (Pliocene), California 
[C. sanctæclaræ m. Sp.]. — Fr. Coccins Baker. Note on Planor- 
bis Binneyi Tryon. — V. Srerki. Pisidium Marci nm. sp. [Utah]. 
— Notes: J. H. BLAKE, A Giant Squid ; — C. DAyToN GWYER, 
Ferguson Collection. 
Vol. XXIII, n° 4, August and September 1909. 
Contents : H. A. PizsBry. Mollusks from Northeastern Mexico 
[Emmericia (Emmericiella) novimundi, E. (Emmericiella) longa, 
Pterides (mov. gen.) pterostoma, Pt. rhabdus, Pt. bisinulabris 
nn. Spp., San Luis Potosi] (PI. V). — CARLOS DE LA TORRE. 
Descriptions of Two New Cuban Land Shells [Macroceramus 
Hendersoni, Chondropoma Hendersoni mn. spp.] (PI. IV). — 
J. B. HENDERSON, Jr. Descriptions of New Cuban Land Shells 
[Helicina Torrei m. sp., Cepolis alauda cymatia mn. subsp.] 
(PL. IV). — V. Srerkr. Bifidaria armifera Say, and its Varie- 
ties [B. armifera interpres, similis, afjinis, abbreviata mn. 
var.]. — P. Barrsca. More Notes on the Family Pyramidellidæ, 
— Notes : J. T. Baïzy, Jr., Viviparus in Philadelphia, 
