of the Piedmontese Coast, 185 



Eulima polita, Ph. ^ B. M, — E. nitida. Ph. (E. polita, var. B. M.). 

 — E. distorta. Ph. ^^ B. M.—E. subulata. Ph. ^ B. M. 



Chemnitzia. For the sake of more convenient arrangement (this 

 genus being otherwise perhaps too extensive), I have adopted the 

 views of my late friend Professor Forbes, in separating this genus 

 and EuHmeila from Odostomia ; although the transition from one of 

 those so-called genera to either of the others is gradual and almost 

 imperceptible. Adult and perfect specimens have occasionally the 

 columellar tooth or fold. I have detected it even in C. elegantissima 

 or lactea, as well as in C. gracilis, indistincta, and fenestrata. C. 

 elegantissima. Ph. ^^ B. M. ; var. costis flexuosis et dente columel- 

 lari. — C. pusilla, Ph. ^ B. M. — C. gracilis, Ph. : this species is very 

 distinct in form and the want of angularity in the whorls from the 

 preceding, with which the authors of the * British Mollusca ' sup- 

 posed it to be identical. The difference is as great between these 

 species, as between either of them and C. elegantissima. — C. pallida. 

 Ph. (Parthenia varicosa, Forbes, My. Inv.). — C. rufa. Ph. ^' B. M. — 

 C.scalaris, Ph.^B.M. — C. unica (Aclis unica, B.M.). — C. fenestrata, 

 B. M.—C. indistincta, B. M. 



Odostomia clathrata, B. M. A single specimen of this distinct 

 species occurred to me at Spezia ; and I observed another at the 

 British Museum, in Mr. MacAndrew's collection from the Canaries. — 

 O. interstincta, B. M. (Rissoa suturalis. Ph.); var. angustior. — O. 

 terebellum. Ph. The form, disposition of the ribs, and the greater 

 prominence of the tooth, distinguish this from the last species. It 

 is also a British species, having been found both by Mr. Barlee and 

 myself on the Scotch and Devonshire coasts ; var. angustior. 



Odostomia tricincta, n. s. PL II. f. 12, 13. 



Testa brevi-fusiformis, lutea, zonis tribus angustis fuscis in ultimo 

 anfractu (2 in penultimo et antepenultimo, 1 in proximo) ornata, 

 solidula; anfractibus 6 (quorum 2 supremi sinistrorsum retorti) 

 ultimo reliquos sequante, complanatis, nitidis, costis circa 20 longi- 

 tudinalibus subflexuosis interdum bifidis interstitia aequantibus 

 obsitis ; sutura distincta ; apertura ovato-rhomboidea, ad basin 

 subeffusa, tertiam spirae partem sequante, columella prope mediam 

 uniplicata, labio reflexo ; long. ^, lat. ^j uncise. 



Sestri di Levante, at the roots of Corallina officinalis ; not com- 

 mon. Nice, Verany. 



I also observed specimens of this prettily marked shell in Mr. 

 MacAndrew's collection from the Canaries at the British Museum. 

 It may possibly be the Rissoa doliolum of Philippi ; but he does not 

 notice the coloured bands, nor the fold on the pillar lip, and the 

 number of ribs in his description and figure are fewer. 



Odostomia excavata, B. M. (Rissoa excavata. Ph.). — Q. Humboldti 

 (Chemnitzia Humboldti, Ph.). Sestri di Levante ; and Verany had 

 also found it at Nice. — O. conspicua, B. M. My specimens, which 

 were dredged in about 10 fathoms in the Gulf of Spezia, measured 



