44 SIGARETUS. 



incised st.rise, having a pyriforna aperture with the inner lip 

 thick and tortuous above, and the outer somewhat expanded 

 below. 



20. COARCTATUS, f. 34, Reeve. — Testa quam S. papilla 

 brevior, laeviuscula, ad suturam tumida, turn contracta, um- 

 bilico latiori ; spira breviori. — Much shorter and more finely 

 sculptured than S. papilla, with a wider umbilicus. 



21. TUMESCENS, f. 37, Reeve. — Testa quam >S^. papilla 

 tenuior, leviter sculpta, spira magis acuminata, ad suturam 

 vix tumida. — A smoother and more gradually sloping shell 

 than S. papilla, with the whorls scarcely swelled at the 

 suture but gradually sloped. 



22. NiTiDUS, f. 35, Reeve. — Testa laevigata, leviter incisa, 

 ovali-subglobosa, solida, late umbilicata, quam 8. papilla 

 magis ventricosa, labio iuterno rectiusculo. — A more ventri- 

 cose and smooth shell than S. papilla, with a rather straighter 

 inner lip. 



23. OBLONGus, f. 40, Reeve. — Testa quam S. papilla graci- 

 lior et magis acuminata, striis parvis elevatis sculpta, anfrac- 

 tibus superne gracile declivibus, spira elevata acuminata, 

 apertura angusta, antice subquadrata. — Narrower than any 

 of the preceding and gradually attenuated from below the 

 middle to the acuminated spire. 



24. ACDMiNATUS, f. 43, Adams and Reeve. — Testa quam 

 S. papilla tenuior, gracilior, spira magis elevata anfractibus 

 ad suturam baud tumidis, labio interno flexuoso, tenuiusculo, 

 umbilico angusto. — Thinner, more slender, with a more 

 elevated spire than 8. papilla ; inner lip flexuous, umbilicus 

 narrower. 



25. MAMiLLARis, f. 41, 42, Liunwus (Helix), Reduz. — 

 Testa alba, polita ovata ventricosa, spira brevi, anfractibus ad 

 suturam rotundis, spira brevi ; apertura semilunari, umbilico 

 valido. — More equally oval, or less sloped than the first 

 species in this section, roimded at the suture and smooth on 

 the surface, and having a very short spire. I agree with Mr. 

 Hanley, ' Ips. Linn.,' in thinking that Recluz was probably 

 right in this identification of a rather doubtful shell. 



26. PELLTJCiDUS, f. 38, Reeve. — Testa globosa, late urn 

 bilicata parva tenuis ; anfractibus superne subdeclivibus, 



