47 



Art. V. Description of a New Species of Helix, belonging to 

 the Carocollseof Lamarck; by G. B. Sowerby, F.L.S., &c. 



Helix Fulgurata. Testa suborbiculari, depressiuscula, carinata, 

 carina valid^ ; spira planata, anfractibus quatuor, lutescente- 

 albicantibus, supern^ strigis irregularibus fuscis angulatim 

 flexuosis ornatis ; anfractu ultimo infra fascia fusca strigisque 

 irregularibus fuscis angulatim flexuosis picto ; aperlura subtri- 

 gonali, fusca, angulis obtusis, antico subrotundato, antico 

 inferiori subundato J peritreraate subreflexo ; umbilico mediocri, 

 fusco, infra angulato ; lat. 1'5, axis, 0*6. poll. 

 Obs. Testa tota spiraliter tenuissirae striata, et subundatim oblique 

 rugulosa est. 



Hah. ad Insulam Madegascariensem. 

 Icon. Tab. H. 

 A beautiful and remarkable species, with a somewhat orbicular, rather 

 depressed, strongly-keeled shell, with a flattened spire, consisting of 

 four yellowish white volutions, the upper part of which is ornamented 

 with irregular angularly flexuous dark brown streaks ; the lower part of 

 the last volution has a dark brown band, diverging from which are irre- 

 gularly angular flexuous dark brown streaks ; the aperture is of a nearly 

 triangular form and of a dark brown, almost black colour, the anterior 

 angle, however, is obtuse and somewhat rounded, and the lower anterior 

 angle is somewhat flexuous ; its peritreme or border is reflected, though 

 not very strongly, the umbilicus is of n^-iddliug size and dark brown 

 colour, and its inferior edge is angular : width of the shell one inch and 

 five tenths, and length of its axis six tenths of an inch. 

 Observe, that upon a minute examination, the whole surface of the shell 

 will be found to be covered with very close set, slender spiral striae, and 

 also with irregular, rather wavy oblique rugulosities. 



From Madegascar. 



