Zoological 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 RJiody- 

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

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

 where they form a dense thicket of a rich crimson colour. The 

 shoots of the Chondrus 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 rubens 

 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 sufficient 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. 



ii' May 19th, 1854. 



PROCEEDINGS OF LEARNED SOCIETIES. 



'" r " ZOOLOGICAL SOCIETY. 



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



BfESCRIPTIONS OF EIGHTEEN NEW SPECIES OF LaND ShELLS, 



-W' FROM THE Collection of H. Cuming, Esq. 



'{}'■ By Dr. L. Pfeiffer. 



1. Helix avus, Pfr. H. testd umbilicatdf depressdy solidd^ ob- 

 lique striatuld^ nitiduld, pallide fulvd ; spird convexdy brevi ; 

 siiturd levi; anfractibus 4 vix convexiusculis, sensim accres- 

 centibuSf ultimo carinatOy utrinque convexiore, fascia fusca ad 

 suturaniy pallidaque ad carinam ornato^ bast pallido, circa um- 

 hilicum mediocrem, pervium subcompresso ; aperturd vix obliqud, 

 subtrianyulari-lunari ; peristomate crassoy albo, expanso et re- 

 Jlcxo, marginibus remotis, callo crasso juncfis. 



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

 Hub. in insulis Philippinis. 



2. Helix Emiliana, Pfr. H. testd perforata^ eonoideo-lenti- 



