SCALIDA 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, Mirch. 
40. ScALA (CIRSOTREMA) COCHLEA, Sowb. 
T. turrita, imperforata, alba vel pallide ferruginea; anfr. contabulati, sutura canaliculata, liris 
cire. 5 squamosis, varicibus 3 ad suturam angulatis, dorsalibus, continuis; lamin incrementi 
conferte, undulate, reflexee, margine utrinque expanse, depressee, lineis divaricatis, saepe 
approximate vel fere confluentes vel huc illue foramina orbicularia formantes. Sutura et 
costa spirali basali laminis incrementi utrinque septa. Apertura subcircularis. Operculum 
nigrum. 
Long. 40 mm.; diam. 13 mm.; alt. aperture 7 mm. 
Scalaria varicosa, Gray, Wood Supp. 1828, t. 6, f. 192 
Scalaria cochlea, Sowb., Thes. p. 103, fig. 142. 
Scalaria varicosa, Lam., Skand. Naturforsker Mide, 1846, p. 938. 
Scalaria attenuata, “ Helbl.”* Beck, ibid. 
Hab. 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 Dunkev’s 
figure in Mollusca Guineensia. 
Scalaria fimbriata, 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.t 
Scalaria varicosa, p. p. Sowb., Thes., fig. 143. 
Scalaria cochlea, Dkr. Moll. Guineens., t. 2, f, 47-48. 
* Bohmische Privetgesellschaft ivy, 1799, p. 114, tab. 1, f. 20. 
Which is a fossil species. 
