304 PROCEKDIXGS OP THK MA LA.CO LOGICAL SOCIETY. 



of the sliell being covered with a large callosit\', and Naticaria 



in having a thin oblong shell with a large oblong mouth and 



a thin inner lip. Cernitia is imperforated with a large moutli. 



and the inner lip callous." 



In 1847 Gray informs us that Mammilla, Gray, 1840 = 



Polinices, Montf., 1810 ; and Naticaria, Gray, 1840 = Mammilla, 



Schum., 1817. 

 Cernina, 1840. See preceding note. 

 Cinulia, 1840. 1842, p. 62. "The Cinulia are like the Tornatella 



with two plaits, and the outer lip is thickened externally." 

 Cladophora, 1840. In 1847 given as a synonym of Triopa, Johnst., 



1838; and Liopa, Gray, 1840, quoted as a misprint for this 



name, though the two names are given in different families. 

 Clangulus, 1840. 1847. Claficulus, Montf. 

 dementia, 1840. 1842, p. 75. "The Tapes and T'enentpes have 



oblong shells with very compressed teeth, and the Clement ia are 



like the latter, but are very thin, and have a cavity in the margin 



before and behind the teeth." 

 Clenoconcha, 1840, p. 135. 1840a, p. 139. " Ctenoconcha, which luis 



many characters in common with the Solens, has the teeth like 



Nucula, but it has an external cartilage." 

 Culana, 1840. 1842, p. 58. "The Pileoli are [fossil] shells of 



a conical form with a circular base ; the inner lip is expanded as 



far back as the liinder edge of the whorls, forming an edge to 



the base. The Culance differ in being oblong and I'atlier convex 



beneath." 

 Ci/clotrema, 1S40. 1847. Cyclostrema. 

 Cijpricia, 1840. In 1847 given as of (Jray 1837, but I have not 



found any reference of that date. The type is given as 



M. anatina, and Laliosa, Schmidt MSS., MoUer, 1832, cited as 



coequal. 

 Dalacia, 1840. 1842, p. 83. "The Dalacia are like tlie Crenatula, 



but have tlie umbo some distance from the front of the hinge 



margin instead of quite at the angle." 

 Damaris, 1840, p. 38. 1840a, p. 142. "In Wnio, Damaris, etc., it 



has lateral teeth of different degrees of development and form, so 



that they sometimes resemble cardinal ones." 

 Deriobranchus, 1840. 1847. Deridohranchm, Ehr. 

 Detracia, 1840. In 1847 type is given as Vol. bullcenides. 

 Biacria, 1840. 1842, p. 86. " In some [Cleodo>-id(e'] there are lateral 



slits in the sides of the sliell which are interrupted in front in 



the globular shells of the ITi/alcea;, and continued to the moutli in 



the elongate Diacria." 

 Diastroplta, 1840. In 1847 quoted as Diastrophia, Guild.. Gray, and 



type given as Ph. GuihUngii. 

 Dorsina, 1840. 1847. Dosinia. 

 Bostia, 1840. 1842, p. 58. "The Dontioi differ [from Clithon'] in 



having a nearly symmetrical shell with only the rudiment of 



a spire, and the inner lip, like Nerifina, is only denticulated." 

 Bota, 1840. 1847. Boto, Oken, 1815. 



