290 Geological Society. 



From the Questa de Arenas (Huasco, Chile). Found on a species 

 of Juncus. 



SucciNEA REFLEXA. Suc. T. ovato-oblongd, tenui pelhicidd, ni- 

 tidd, minutissime gramdosd, corneo- sulphured, strigis irregularibus 

 interdum ramosis, rufis ornatd ; anfractihus 5 planiusculis, ultimo 

 spiram vix superante ; aperturd ovali-oblongd, intus albidd, obso- 

 lete strigatd; peristomate simplice, acuta, margine columellari 

 tenuissimo, alba reflexo. 

 Long. \%\ ; diam. 8| lin. 



From Pichidanque, near Coquirabo. Found on the leaves of Pour- 

 ret ia coarctata. 



SucciNEA VARIEGATA. Suc. T. ovato-acutu, soUdiusculd, longitudi- 

 naliter rugosd, regulariter granulatd, luted, macuUs longitudinuli- 

 bus et punctis nigricanti-rufis seriatim pictd ; apice acuto ; anfrac- 

 tibus b\ planiusculis, ultimo ^ longitudinis subeequante ; aperturd 

 oblongo-ovali, intiis nitide albd, strigis pellucentibus ; peristomate 

 simplice, acuto, margine columellari subcalloso. 

 Long. 24 ; diam. 11| lin. 



Valleys in the north of Coquimbo. Found in crevices of rocks, 

 " These three species, described under the name of Succinece, belong 

 to that group of Helicece of which the well-known Hel. gallinasultana, 

 Chemn., is the type. The shell having no columella is perfectly 

 analogous to that of the genuine Succinece, and we are informed by 

 Mr. D'Orbigny's observations, that the animal of H. gallinasultana is 

 also very similar to Succinea in its form and habits. Accordingly 

 this species must be related to Succinea, and I believe that the spe- 

 cies above described should not be separated from it, although we 

 do possess but imperfect notions of their habits. Of one species it 

 is noticed that it was found on a species of Juncus, probably in the 

 vicinity of water. 



" By the same reason (the analogy of shells) I have enumerated 

 the Bulimus Broderipii and Coquimbensis among the Succinea (in my 

 * Symbolee ad Historiam Heliceorum')." 



GEOLOGICAL SOCIETY. 



[The following interesting extracts are taken from the Anniver- 

 sary Address delivered by the President, R. L Murchison, Esq., on 

 the 17th of February 1843.— Ed.] 



Paljeontology. 



Ichthyology. — Geologists who have commenced their career since 

 the glacial theory has been in vogue and have read the numerous 

 memoirs and heard the exciting discussions to which it has given 

 rise, are chiefly acquainted with Professor Agassiz as one of its 

 most ingenious expounders. I have now the jDleasure to acquaint 

 you that iNL Agassiz is once more completely absorbed in his great 

 work on fossil fishes — that work which you so justly honoured, in 

 the year 1835 to 1836, with your Wollaston Donation and Medal. 

 Of his progress in this arduous undertaking, he has recently given 



