24 THE NAUTILUS. 



At Redondo I secured the largest shell of Pachydesma crassatel- 

 loides that I have ever seen. Terminal Island afforded more shells 

 than any other place I visited. On muddy banks of little pools near 

 the lagoon I found a quantity of Gerithidea sacrata and Melampus 

 olivaceus. 1 had read that these were found on " mud flats of 

 brackish pools," and a short search revealed abundance of them, also 

 a few specimens of Bulla nebidosa. On the ocean side of the Island 

 I found a good Ocinebra Poulsonii, a Trophon Belcheri and the rare 

 Waldheimia. A few good shells of the following : Psammobia rubriata, 

 Lutricola alba, Neverita reclusianus, Lunatia Leivisii, Drillia penicil- 

 lata, Monoceros engonatmn, Amiantus callosa, Macoma secta, Chione 

 succinta, Topes stammea, Mytilus, Crucibidum spinosum, and three 

 varieties of Acmaea, a quantity of Chlorostoma gallina and Pecten 

 equisulcatus, upon which were numerous Crepidula. The beach is 

 strewn with dead shells, among them large specimens of Gtycimerh 

 and Macoma. 



GENERAL NOTES. 



Philomycus lactiformis (Blainville). This slug, described by Blain- 

 ville in 1817 (Journ. de Phys., p. 443) as Limacella lactiformis, has 

 been only known since that time by the original specimen, which is 

 in the British Museum. Specimens from York Co., Pa., collected by 

 Mr. Witmer Stone in 1889, prove to agree excellently with the Blain- 

 villean animal, having just the same white color and semi-pellucid 

 appearance. It is not likely that the species is separable from the 

 ordinary forms attributed to P. carolinensis, except as a color varia- 

 tion.— H. A. P. & T. D. A. C. 



J. F. Babor, of Prague, has added to our slight knowledge of the 

 Arionine group Ariunculus, in describing the anatomy of A. austria- 

 cus n. sp., from Schneeberg, near Vienna, in the Austrian Alps. 

 (Proc. Mai. Soc. Lond., III.) 



M. Ph. Dautzenberg has recently described a collection made by 

 M. J. L. "Weyers, of Sumatran mollusks. New forms of Cerithidea 

 and Stenothyra are described, and valuable notes and figures of Me- 

 lanians and Navacellae are given. M. Weyers found the Antillean 

 Snbulina octona abundant in many localities (Ann. Soc. Roy. Mai. 

 Belg. 1899). 



