ORDINARY ■ MEETING : 8 DEC. 1893. 33 



his first cited " species " being a Turritella. In 1 778 Da Costa (following 

 the plan adopted throughout his work) placed the terrestrial forms first, 

 so that the first "species" which he then described was his S. perversus. 

 Whilst his figiu-e was manifestly that of a Clatisilia, his synonymy showed 

 that he included forms now referi'ed to more than one species of Clausilia, 

 and to Balea ; hence there was nothing to show clearly what his type species 

 really was. The marine species associated under the same genus included 

 examples of the genera Turritella and Scalaria. If, therefore, Strombi- 

 formis were to be revived at all it must be in place of Ticrritella and 

 not of Clausilia. 



Mr. Harris responded that Da Costa's earlier work was not binomial 

 and the word " Strombiformis " was not then employed, but the phrase 

 " Cochlese Strombiformes." He acknowledged that Turbo perversus, Linn., 

 was a Balea, but maintained that an error of synonymy on Da Costa's 

 part did not invalidate his species. Da Costa evidently described a 

 Clausilia ; and if objection were taken to the adjectival form of the name 

 it might be emended, he suggested, to Strombiformia. 



[Note. — Da Ccista's later work is not strictly binomial throughout, and on 

 that account his names have not been accepted by many conchologists. — Ed.] 



Messrs. J. C. Melvill and J. H. Ponsonby exhibited the types of all 

 the mollusca described by them from South Africa, except that of 

 Pupa liaploa (unfortunately destroyed). Mr. J. C. Melvill also 

 exhibited the ty^Q of the Engina described in his paper, and photo- 

 graphs of the radulce of Engina mendicaria and E. lauia. 



Mr. W. Moss exhibited full-grown, immature, spirit, and dissected 

 specimens of Bulimus ohlongus from Trinidad, with its eggs; also 

 a specimen of StrejJtaxis deformis showing the young within the parent 

 shell. 



Mr. Da Costa exhibited Ortlmlicm laheo ; 0. Yatesi, var. ; 0. Salteri 

 (type), and 0. Adamsotii, from Peru ; 0. Adamsoni, var. ; 0. 

 Foioisianus, var. ; 0. iris, and a new species ; as well as Clausilia 

 magistra and C. epistomium, from Bogota. 



Mr. G. B. Sowerby exhibited and made a few remarks on a specimen 

 of Megasella (sp. ?) ; he also exhibited the types of four of the species 

 described in his paper. 



Mr. J. E. Harting exhibited and remarked upon specimens of 

 Planorhis corneas from Weybridge, similar to those shown at the 

 previous meeting. 



Mr. E. R. Sykes exhibited the types of the two new species from 

 Tenerife, with Pupa cylindracea from the same locality. 



ORDINARY MEETING. 



Friday, January 12th, 1894. 



Dr. H. "Woodward, F.R.S., etc.. President, in the Chair. 



The following were elected Members of the Society : — Dr. A. Brot, 



Mons. Caziot, A. E. Craven, Langley Kitching, E. H. Matthews, Rev. 



A. Milnes, B. Schmacker, Miss Skeet, Henry Suter, Mrs. Henry 



"Woodward. 



Messrs. W. Crouch and H. Groves were appointed Auditors. 



