CURRENT LITERATURE. 21 



The specimen here described — Galitetithis armata, gen. et sp. nov. — is a pelagic 

 form purchased in the Nice market. It is placed in a new famiJy — Crmicltionychice 

 — in the Cl^gopsida division of the Decapoda. 



Joubin, L. — Observations sur divers Cephalopodes. Bull. See. Zool. France, 

 1898, T. xxiii, pp. 101-13, 2 figs. 



Prof. Joubin gives a very useful diagnostic key of the Taonotcuthidic and 

 describes Grinialditetithis richanii, gen. et sp. nov. 



Joubin, L.— Sur quelques Cephalopodes du Musee Royal de Leyde et description 

 de trois especes nouvelles. Notes Leyden Mus. , 1898, vol. xx, pp. 21-28. 



The three new species are Octopus horsii, 0. hoeki, and Sepiotheiithis sieboldi. 



M'IntOSh, W. C. — On the Larval Stages of Clione liinacina, Phips. Ann. and 

 Mag. N. H., 1898 (7), vol. ii, pp. 103-5, P'- of pi. 2. 



Mason, Geo. ^. — Agriolimax Levis, new variety. .Sci. Goss., 1898, p. 157. 



Mr. Mason describes a form much resembling the type in size and colour, with 

 the mantle "very minutely mottled with rich dark red-brown, the colour being 

 denser and more closely set in the centre and anterior portion. The sides in some 

 examples are almost without trace of the mottling." [I have long had this in- 

 teresting variation under the MS. name riifrapuiictatits. It occurs in Warwickshire 

 sparingly. I have also examples from Surrey. — W. E. C] 



Moore, J. E. S. — The Mollusca of the Great African Lakes. I. Distribution. 

 Quart. Journ. Micro. Sci., 1898, vol. xli, pp. 159-80. 



Moore, J. E. S. — The Anatomy of the Typhobias, etc. Ibid., pp. 181-204, 

 pis. 11-14. 



The anatomy of Typhobia, " probably the most remarkable freshwater Gaster- 

 opod at present known," is here described for the first time. A new family Typho- 

 hiidit is proposed for the two known forms — T. horei, E. A. Sm. , and Bathanalia 

 ho'vesii,, Moore. 



Typhobia is at once separated from any freshwater type, by the almost unique 

 character of its nervous system. The gills are similar to those in Strombns and 

 Pterocera, while in the characters of the alimentary system a similar relationship is 

 indicated. Although the Typhobias can scarcely be termed archaic forms, they do 

 possess undoubtedly archaic characters, such, for instance, as in the character of 

 the otocysts and nervous system, in all other respects they appear to be allied to 

 Strombns and Pterocera, retaining a more generalised type of foot and mantle. 

 "They certainly possess none of those characters which would suggest that they 

 can by any possibility be regarded as the persistent representatives of an old fresh- 

 water stock. They do, however, simulate and retain the characters of the nerves 

 of the Solarium and the Scalariils, and they probably indicate the road by which 

 the more modern marine genera of the Stroiitbid<e and their associates have been 

 envoi ved." 



The paper is an exceedingly interesting one, and beautifully illustrated. — W. E.G. 



Moore, J. E. S.— On the Hypothesis that Lake Tanganyika represents an Old 

 Jurasic Sea. Ibid., pp. 303-21, pi. 23. 



Moore, J. E. S. — The Marine Fauna in Lake Tanganyika and the advisability of 

 further exploration in the great African Lakes. Nature, 1898, Aug. 25, 

 pp. 404-8. 



Oldham, C. — Abnormal example of Limax Jlavus. Naturalist, 1S98, p. 240. 

 Refers to L. variegatus, Drap. 



Paravieini, G. — Organi genitali anomali nell' Helix poiiiatia. Boll. Scient. 

 Maggi, 1898, An. 20, pp. 39-44, T. i. 



