SCALID^ OF THE WEST INDIA ISLANDS. 205 



Scalaria crassilabris, Sowb. Thes. p. 87, f. 115, is very like the species. 

 Var. pumilio, spira varicibus crassioribus sparsis. 

 Long. 5 mm ; diam. 2 mm. 

 Hab. St. Thomas (Krebs, Riise); Bahama (Riise). A very large specimen. 



Sect. ********. Cirsotrema, Morch. 

 40. ScALA (Cirsotrema) cochlea, Sowb. 



T. turrita, imperforata, alba vel pallide ferruginea ; anfr. contabulati, sutura canaliculata, liris 

 circ. 5 squamosis, varicibus 3 ad suturam angulatis, dorsalibus, continuis; laminae increraenti 

 confertfe, undulatse, reflexse, margine utrinque expanses, depressse, lineis divaricatis, ssepe 

 approximatfe vel fere confluentes vel hue illuc foramina orbicularia formantes. Sutura et 

 costa spirali basali laminis incrementi utrinque septa. Apertura subcircularis. Operculum 

 nigrum. 

 Long. 40 mm.; diam. 13 mm.; alt. aperturae 1 mm. 



Scalaria varicosa, Gray, Wood Supp, 1828, t. 6, f. 19] 



Scalaria cochlea, Sowb., Thes. p. 103, fig. 142. 



Scalaria varicosa, Lam., Skand. Naturforsker Mode, 1846, p. 938. 



Scalaria attenuata, "Helbl."* Beck, ibid. 



Hah. St. Thomas (Hornbeck); St. Croix (Riise, Krebs); St. Domingo (Shom- 

 burgk, B. Mus.) Tortola in mud, 1-2 feet water (Swift). 



In good specimens the edges of the ribs are dilated, touching each other, only 

 leaving some small interstices formed by the undulations of the lines of growth ; 

 the surface between the ribs is thus quite concealed. 



I feel convinced that the specimen figured in Thesaurus, fig. 142, in reality is 

 from the West Indies, and not as indicated collected by Dr. Thams at Loanda. 

 The figure 143 is without doubt from the latter locality, a specimen from Fayal, 

 in Rob. Swift's collection, agreeing exactly as well with Sowerby's as Dunker's 

 figure in Mollusca Guineensia. 



Scalaria fitnbriata. Lam., Enc. Meth. 1816, t. 451, f. 4. 



Scalaria varicosa. Lam., hist. p. p. 



Scala crispa, "Lam.," Kien. Spec. gen. t. iv, f. 12, not Lam.f 



Scalaria varicosa, p. p. Sowb., Thes., fig. 143. 



Scalaria cochlea, Dkr. Moll. Guineens., t. 2, f. 47-48. 



* Bohmisclie Privetgesellschaft iv, 1799, p. 114, tab. 1, f. 20. 

 Which is a fossil species. 



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