CANARIAN GROUP. 453 



lamella ventral! superior!) sat evidenter efficiente. Long. lin. 

 circa 1J. 



Pupa castanea, Shuttl., Bern. Mitth. 145 (1852) 

 Pfei/.,Mon. Hel. iii. 550 (1853) 



(pars), Mouss., Faun. Mai. des Can. 126. 



pi. 6. f. 20, 21 (1872) 



Habitat Teneriffam (et sec. Shuttleworth et Mousson, sed an 

 vere ?, Palmam) inter folia marcida, etc., ad rupes aquosas supra 

 oppidulum Grarachico, una cum Hyalina Clymene, Physa 

 acuta, Ancylus striatus, et Hydroccena gutta degens. 



06s. P. pythiellce, Mouss., affinis, sed nisi fallor vere dis- 

 tincta. DifFert praecipue testa majore, conspicue latiore, ven- 

 tricosiore, magis ovata, grossiusque striata ; anfractibus con- 

 vexioribus, sutura multo profundius impressa ; apertura majore, 

 multo latiore, et magis auriformi, plicis columellari et exteriore 

 ventrali (ab angulo labri remotiore, disjuncto) submagis obli- 

 quis ; necnon peristomate carneo-tincto magisque expanso, mar- 

 ginibus remotioribus, dextro magis rotund ate sinuato atque intus 

 plerumque magis conspicue tuber culiformi. 



So far as I am aware, this Pupa has been found hitherto 

 only in Teneriffe, and only (I believe) about wet rocks in the 

 neighbourhood of Grarachico ; for although Shuttleworth cites it 

 also from Palma, I am exceedingly doubtful whether he did 

 not confound with it the nearly allied (but, at that time, un- 

 enunciated) P. pythiella, which swarms in that particular island. 

 There can at any rate be no question that the types from which 

 Shuttleworth's very accurate diagnosis was drawn out were from 

 the vicinity of Grarachico, for in his remarks under the Hya- 

 lina Clymene (which has been observed exclusively in that dis- 

 trict) he expressly adds 'Hab. sub saxis et ligno putrido, 

 consort. Puparum, prope Garachico ;' and under the Hydro- 

 ccena gutta (which abounds also on the very same dripping 

 rocks, near Grarachico) he says ' Hab. consort. Helicis Clymene, 

 Pupa castanea, etc., sub saxis udis in Teneriffa,' From which 

 it is quite clear, I think, that the examples which he described 

 were Grarachico ones, taken in company with the Hyalina 

 Clymene and the Hydroccena gutta, on the identical rocks 

 where the three species were subsequently obtained, similarly 

 associated, by Mr. Lowe. 



Mousson does not appear to have caught the exact features 

 completely which separate this Pupa from his P. pythiella ; for 

 although the figures which he gives of the two species are tole- 

 rably characteristic, and even his diagnoses are in some mea- 

 sure discriminative, it is quite evident that he confused them, 

 and consequently altogether mixed up their respective habitats. 



