PROCEEDINGS OF THE SCIENTIFIC ASSOCIATION. 
1. Missoina bryenea Mont. 
? Turbo costatus Donovan , Brit. Shells, p. 178, f. 3. 
,, bryeneus, Montagu, Test. Brit. p. 313, tab. 
15. f. 8. ' 
Pyramis nitens, Brown , 111. Conch. pL 50, f. 77. 
Cingula bryenea, Fleming , Brit. Animals , p. 307. 
Turbo bryeneus, Wood, Ind. Test. p. 31, f. 102. 
Bissoa bryenea, Macgill., Moll. Alerd. p. 341. 
Bassa bryenea, Brown , III. Conch, p. 5 (fide Tories 
Hanley, Brit. Moll, iii, p. 149, part). 
Bissoa lactea, Brown , 111. Conch, p. 11, pi. 8, f. 77. 
Bissoina scalarioides, Adams, Bhilippi in der Zeitschr. 
fur Malalz. 1848 p. 13. 
Bissoa scalarioides, C. B. Adams, Contrib. to Conch. 
p. 113. 
Bissoina bryenea, $. v. M. op. cit. p. 71, f. 36. 
It is not unlikely that this species is identical with 
Missoina firmata Adams, and R. dubiosa Adams. Yfhen 
young it approaches R. chesneli Mich., but the tooth-like 
elevation on the labrum supplies a distinctive character. 
Habitat. Cuba, Jamaica, Yirginislands, Martinique, 
Guadelupe, Mauritius. 
2. Missoina firmata Adams. 
C. B. Adams, Cat. Moll. Manama pp. 177, 313. 
S. v. M. op. cit. p. 72, f. 37. 
Dr. Philip P. Carpenter in his “ Beview of Prof. C. B. 
Adams 7 Catalogue of the Shells cf Panama from the Type 
Specimens” (Proc. Zool. Soc. Bond. 1863, p. 15) says, “it 
has a fine spiral sculpture,” and that it is identical with 
R. scalariformis Adams, Prof. Adams found only one 
specimen at Panama, and Schwartz von Mohrenstern has 
