THIRD WINTER MEETING— NOVEMBER 23nd. 1904. 



*'NEW PHOTOGRAPHIC APPARATUS AND MATERIALS/ — 

 By Mb. W. F. SLATE3. 



The third mepHnp was held on November 22, ttps he phowpd and described the Zambpx da^liehfc 



■when Mr W. F. Slater. F.R P S., ^avean interest- l-mdioff. flat film cam*'»a9. and Dai-Cornex or day- 



iDK demonstration of Mesbra. K and J. Becks' new light loading plate cameras. 

 Photograpnic Cameras, etc. Among uther novel- 



FOURTH WINTER MEETING— DECEMBER 7th, 1904. 



'NATURE AT WORK AND PLAY."— By Mk. R. KEARTON, F.Z.S. 



On December 7th, R. KoartoD, Esq., F.Z.S. . described in a ^rraphic manner the habits of many 



delivered tu a cruwded audience in St. Georgw's of our wild birds aod animals, and his m^i^nificent 



Hall his WfU-knowQ lecture entitled " Nature at lantern blides trom pholograpos of actual wildlife 



Work and Play." In the absence of Mr. S. Harvey, at wurk and play in their native haunts, were much 



the Rev. A. J. Galpin presided. The lecturer appreciated. 



FIFTH WINTER MEETING.— DECEMBER 13th, 1904. 



'* BARNACLES. "—By Mr. S. SAUNDERS. 



The fifth winter meeting took place in the 

 Reference Library of tbe Bnanuy lustitute on 

 December 13th, lOO-t, when Mr. 6. Sounders gave 

 a lecture eutitled '' BarDacles" {Uirripedia),m the 

 course of which he said : — 



Iq coDsiderintj the various types of organization 

 found amoni; the low«r animals, we caanot trace 

 with absolute dititioctnfss che advance frum uae 

 group to another of more C' implex structure. 

 Each group presents some poinds of rela'ionsh'p 

 with other.-! dissimilar trom, Awi yet allied to it ; 

 and sometimes we find a combiaation of the 

 charactariatics of t»vo or morn distinct classHS. 

 This ii eXbiuplified ia the Cirriped a, which occupy 

 debateable ground bntweun tbe crustacea and the 

 motlusca. By the older naturalists thnsu aDim>ils 

 ■were associated with the 8hMU-he*rioir muHusca, 

 and there is much in their structure to justify that 

 classifiottion, especially in tbe similarity ot the 

 shell ot' the peduuculated barnacle with that of a 

 bivalve mollusc, and the liknnes-' nf some of the 

 sessile species to the univalve, PatcUidx —of which 

 the cominoQ limpet ici a familiar ex ^mple. But it 

 is now c >ncod«d that the pr-iper place of the 

 Cirripedia is with the Crustace-i Mr. D*rwiu 

 ranks the Cirripedia. "not as one of the sub- 

 ordinate groups, but as one of tie main divisume 

 of the Crustacea," and he traces the homologiea 



with grnat minuteness through the larval stages 

 of the animal, and accounts for several segments 

 which are wanting in the body o^ the mature 

 cirripede (the absence of which might be said to 

 militate against his theory) by shewing that they 

 exist plainly enough in the earlier laval stages, 

 but are lost before f he pupa p-isses into the mature 

 form; a^, for example, the eyes and two pairs of 

 antttUDa", which are present in the larva, inlicate 

 that the frout of the head conRists of three 

 s^'gments, bur these are nudiscernibln in the adult 

 cirripede, bning lost (aa we shall presently see) in 

 the development of the peduncle and capitulum of 

 the stalked barnacle, or the solidly cemented shell, 

 with its operculum, of the sessile species. The curi- 

 ous metamorphoses will be described lat-er on For 

 the present let us examine the bi'idy of a cirripede. 

 The whole 3h*-ll (with, in the cisr) of th^ stUked 

 barnacles, the peduncle) consists of the fir-t three 

 s-t/niHuts of the head, firmly cemeattid t^ some 

 substance and modified into a carap'ice which en- 

 closes the mouth and the rest of th-i b >dy. This 

 is. in reality, the thorax, and cnn->ist^ of two por- 

 tions : one, a soft bag called the proaoma ; the 

 other (composed of five setjment^) suppoiting the 

 five posterior pairs of cirri, answering to the five 

 pairs of ambulatory lotfs in the higher crusticea. 

 The upper end of the prosoma carried the mouth 



