CHAP. III. ANALOGIES OF THE FUSING. QS 



of the basal channel takes place among the Fusince in 

 Fusus, and the like character among the Pyrida in the 

 opposite column ; while in Chrysodomus and Ficula 

 this part is but of moderate length. Strepsidura is 

 the only genus in the first column^ which, by its lon- 

 gitudinal plaits and prickly tubercles, corresponds to 

 Myristica ; while the inflated shape of Leiostomus im- 

 mediately reminds us of Rapella — its prototype among 

 the PyruUnce. 



(81.) Before taking leave of the Fusince, it will be 

 interesting to ascertain how far the genera put on the 

 aspect of those composing the TurhinellincB, more par- 

 ticularly as, the former being the last, and the latter — 

 TiirhineUincB — the first with w^hich we commenced, 

 it foUows, as a necessary consequence of the circularity 

 of the whole family, that these two divisions join, and 

 blend into each other. This, we think, will be very 

 evident, upon examining the following table : — 



Analogies of the Turbinellin^ and the FusiNiE. 



i Genera of the . ^^„;„„.„ Genera of the 



TuRBiNELLii. Analogies. Fusing. 



Turbmella IjaTa. Typical of their respective groups. Fusus. 



? Sub-typical. Chrysodomus. 



i-^-.^,-,/ „ T ovv, CTrapeziform; the whorls turreted: 7 rr -^ 



Fasciolaria l.a.m. y canal moderate. j Hetmfusus. . 



X,,, ,. fPyriform ; the canal long; the base7 o, j 



Pyrella. ^ of the pillar turned inward. j Strepsidura. 



r Remarkably smooth ; the spireT 

 Clavalithes. < and aperture of equal length ; >■ Leiostomus. 



L the pillar straight. 3 



(82.) It would hardly be necessary to repeat, in this 

 place, the fact we have so often adverted to and illustrated 

 in former volumes, regarding the analogies of typical 

 gi'oups, were it not highly probable that they have not 

 met the eye of our conchological readers. It is there- 

 fore, perhaps, necessary to apprise them, that the re- 

 semblances between the typical divisions of two groups, 

 when thus brought into comparison, are almost always 



