22 TEST ACE A ATLANTIC A. 



Habitat S. Miguel, et Fayal ; in ilia ad Las Furnas, sed in 

 hac juxta Caldeira reperta. 



This extremely diminutive Patula (which is unknown to 

 me except through the excellent figure given by Morelet) 

 appears to recede from the P. pusilla, mainly, in being a little 

 less conical (or with the spire more depressed), as well as in 

 being more coarsely costate, and in having a rather wider 

 umbilicus. From the placida, Shuttlew., it is said to differ 

 ' par I'eyasement de 1'ombilic, et la forme a peu pres circulaire 

 de 1'ouverture.' It is recorded by Morelet from S. Miguel and 

 Fayal, namely from the valley of the Furnas in the former, 

 and from the edges of the Caldeira in the latter. Drouet gives 

 only S. Miguel as its habitat, amongst dead leaves, and under 

 stones, in woods. 



Patula pusilla. 



Helix pusilla, Lowe, Cambr. Phil. S. Trans, iv. 46. t. 5. 



f. 17 (1831) 



Pfei/., Mon. Hel. i. 101 (1848) 



servilis, Shuttl., Bern. Mitth. Diagn. 6 (1852) 

 Pfei/., Mon. Hel. iii. 101 (1853) 



pusilla, a. annulata, Lowe, Proc. Zool. Soc. Land. 



176 (1854) 



Alb., Mai. Mad. 18. t. 2. f. 7-10 (1854) 



servilis, Morel., Hist. Nat. des A$or. 173. t. 3. f. 6 



(1860) 



Drouet, Faun. Acor. 156 (1861) 



hypocrita, Dohrn, Mai. Bldtt. 1 (1869) 

 Patula servilis, Mouss., Faun. Mai. des Can. 25. pi. 2. 



f. 13-16 (1872) 



Habitat S. Miguel, et Fayal ; sub lapidibus in inferioribus 

 (haud procul a mare), sec. Morelet, sed sec. Drouet inter folia 

 emortua in sylvis ; rarior. 



I have had no opportunity of inspecting Azorean examples 

 of this minute shell ; nevertheless if it is rightly referred by 

 Morelet and Drouet to the servilis of Shuttle worth, it is iden- 

 tical with the Madeiran P. pusilla, Lowe, for there cannot be 

 the slightest doubt whatsoever that Shuttleworth's species and 

 Lowe's are one and the same. Indeed there is hardly a single 

 member of the Atlantic Grastropods which is more widely dis- 

 persed than this little Patula ; for not only does it occur 

 in the Azorean and Madeiran archipelagos, but likewise at the 

 Canaries and Cape Verdes (from whence it was re-enunciated by 

 Dohrn under the name of H. hypocrita), and even in the inter- 

 mediate districts of St. Helena. Had Morelet been aware 

 (which I am surprised was not the case) that Shuttleworth's 



