CAPE-VERDE GROUP. 521 



I possess a type of this Succinea, which was taken in the 

 ' Laguna da Eibeira Grande,' in S. Antao, by Dr. H. Dohrn, 

 who speaks of it as allied to the S. oblonga, Drap., and the S. 

 vermeta, Say. Dohrn's diagnosis of it is as follows : ' T. oblongo- 

 acuta, tenuis, diaphana, arcuatim striata, parum nitens, rubello- 

 cornea ; spira elongata, conica, acutiuscula, submamillata ; anf. 

 ultimus |- longitudinis subaequans, inflatus ; apertura obliqua, 

 ovalis, ad labri insertionem vix angulata, intus nitens ; columella 

 valde arcuata; perist. marginibus subsymmetricis, callo junctis. 

 Long. 9-1 0, lat. 4^-5 ; apert. long. 5-5^ mill. 1 



Succinea Wollastoni. 



Succinea Wollastoni, Dohrn, Mai. Bldtt. xvi. 13 (1869) 

 Morel., Journ. de Conch, xiii. 241 



(1873) 

 Pfeiff., Mon. Hel. vii. 39 (1876) 



Habitat S. Nicolao ; ad locum ' Top de Cachaz ' dictum cl. 

 Dohrn abundanter invenit. 



I know nothing of this species, which appears to have been 

 found abundantly by Dohrn at a place the 'Top de Cachaz' in 

 S. Nicolao. He speaks of it as related to the S. concisa, Morel., 

 and as being much coated, or thickened, like so many of the 

 Succineas, with a dirty crust. The diagnosis of it, as given by 

 Dohrn, is as follows : ' T. oblongo-ovata, tenuis, diaphana, irre- 

 gulariter striata, pallide virenti-cornea, agglutinans ; spira 

 conica ; anfr. ult. |- longitudinis subaequans, basi attenuatus ; 

 columella valde arcuata ; apertura oblongo-ovata, obliqua ; 

 perist. simplex. Long. 5-J, lat. 3^ ; apert. long. 3^ mill.' 



Pam. 6. LIMNJEID^E. 



Genus 12. LIMNJEA, Drap. 



Limnaea auricular-la. 

 Limnaea auricularia [var.], Linn., Fna. Suec. 532, 2192 



(1761) 



Limnaeus auricularius, v. ribeirensis, Reib. Cat. (1865) 

 Limnaea Eibeirensis, Dohrn, Mai. Bldtt. xvi. 15 (1869) 

 auricularia, Morel., Journ. de Conch, xiii. 242 

 (1873) 



Habitat S. Antao ; in aquis, sec. cl. Dohrn, abundans. 



This Limncea seems to be very abundant, according to 

 Dohrn, in the waters of S. Antao ; but if truly conspecific with 

 the common European L. auricularia, it certainly constitutes 

 a marked geographical phasis, and as such indeed it was 



