OBSERTED AT MOQADOR. 197 



Subvar. 2. fusco-fasciata. rr. Chemn. /. c. t. 209. f. 2069. H. planata 



{H. arietina olim), Rossm. xiv. 22. t. 66. ff. 825, a, b (excl. f. 826 et 



habit. " Lanzarote, W. u. B."). 

 /3. obtusangula ; carina aperturam versus subobsoletiore, apertura 



perinde minus angulata, testa subglobosiore, spira elevatiore, anfr. 



subconvexiusculis. 

 Subvar. 1. omnino cretaceo-alba. ccc. 

 Subvar. 2. fusco-fasciata. rr. 

 On shrubs of Broom {Retama monosperma (L.)) in the neighbom'hood 



of Mogador. 



The Canarian H. planata, Webb, Syn. 8. No. 3 (H. pisana mon- 

 sti'osa, D'Orb. Hist. Moll. Can. p. 59), is a perfectly distinct 

 species from this Moroccan or Chemnitziau shell. In a MS. cata- 

 logue of Canarian shells, sent many years ago to AVebb, I had 

 called it (as a new species) H.f estiva ; on vehich he remarks, in a 

 letter dated " Paris, August 26, 1833," " H.f estiva, Lowe, in lit., 

 is a variety of H. planata, Chemn.," under which name it there- 

 fore stands in his ' Synopsis.' It is well distinguished by Mousson 

 ill Hartung's Geolog. Verhaltn. p. 133, under the odd name of H. 

 impugnata, from both H. planata, Chemn., and S. pisana, Miill., 

 to the former of which Eossmassler refers it (J. c. f. 826) along 

 with his H. arietina, f. 825. 



8. Helix caperata, Mont. 



y. mogadorensis ; submajor rugosula distinctius et grossiuscule costulato- 



striata, carina suturaque striis prominuhs saepius subcrenulata v. 



erosulo-rugosiuscula. 

 Diam. maj. 4J-6 lin. (10-13i millim.), min. 4-5i Un. (9-12 mill.) ; alt. 



3-4i lin. (7-10 mill.). Anfr. 5. 

 Sand-hills ; apparently not uncommon. 



At first sight this appears, in well-developed living specimens, 

 sufficiently distinct from H. caperata, Mont., by its much stronger 

 and more raised or rib-like strise, which, in crossing the generally 

 distinct though not rim-like keel, form in many specimens more or 

 less prominent, though irregular crenulations, like those of H. 

 rugosa, Chemn. {H. Gargottce, Eossm. f. 357) ; from which species 

 it is, however, quite distinct in its smaller umbilicus, its simple, 

 not margined (though subcrenulate) keel and suture, and in the re- 

 mote, not approximate, margins of the peristome. In every otlier 

 point it agrees with large English or Portuguese examples of H. 

 caperata, Mont. {H. striata, Drap. partim, nee aliorum) ; differ- 

 ing from H. lauta, Lowe, in its rather larger umbilicus, and from 

 both that species and //. Terverii, Mich. (Eossm. ft". 354 (/, 565, 



