Zoolugical Society. 491 



I made a careful sketch of the outline of one, to serve as a stand- 

 ard of comparison. For a fortnight I could detect no certain 

 increase, but being then absent from home for a week, I found 

 on my return a decided growth, the scale having pushed out an 

 irregular sinuous projection. 



At the time of my closing this note for the press, the state of 

 things is as follows. The shoots of the Gracilaria have attained 

 a length of one-third to one-half of an inch : those of the Rhody- 

 menia jubata are from one- half to two-thirds of an inch in length ; 

 they are very numerous, especially about the roots of the plant, 

 w^here they form a dense thicket of a rich crimson colour. The 

 shoots of the Chondnis are steadily increasing, but more slowly. 

 The tiny Ceramium has come to an untimely end, having been 

 eaten off, probably by some vagrant Rissoa. The Corallina I 

 have just described. Besides these, patches of the fine dense fila- 

 ments of a Callithamnion (perhaps Rothii) are appearing on some 

 of the shells ; and the tips of a specimen of Phyllophora mbens 

 have the brightness of new growth ; but as I have not subjected 

 these to strict comparisons, I will not insist on them. The facts 

 above recorded are sufiicient to show that there is nothing in the 

 nature of the Rhodosperms to prevent their being cultivated in 

 confinement, with a facility far superior to that which attends 

 the culture of multitudes of terrestrial plants that reward the 

 skill and perseverance of the horticulturist. 



P. H. GossE. 



Mav 19th, 1854. 



PROCEEDINGS OF LEARNED SOCIETIES. 



ZOOLOGICAL SOCIETY. 



May 25, 1852.— J. Gould, Esq., F.R.S., Vice-President, in the Chair. 



Descriptions of eighteen new species of Land Shells, 



FROM THE Collection of H. Cuming, Esq. 



By Dr. L. Pfeiffer. 



1. IIelix avits, Pfr. H. testa vmbilicatd, depressd, solidd, ob- 

 lique striatuld, nitiduld, pallide fuhd ; spird convexd, brevi ; 

 suturd levi ; atifractibus 4 vix convexiuscidis, sensim accres- 

 ceritibus, ultimo carinato, utrinque convexiore, fascia fusca ad 

 svturam, paUidaqne ad carinam omato, basi pallido, circa um- 

 biliciim mediocrem, pervium subcotnpresso ; aperturd vix obliqud, 

 subtriangulari-lunari ; peristomate crasso, albo, expanso et re- 



flexo, marginibus remotis, callo crasso June f is. 

 Diam. maj. 37, min. 31, alt. 18 mill. 

 Ilab. in insulis Philippini.s. 



2. Helix Emiliana, Pfr. H. testa perforata, conoideolenti- 



