V. imperialis. \ duced ; the body-whorl and > Cymbiola. 



114 SHELLS AND SHELL-FISH. PART 1. 



without any variation in the order in which each divi- 

 sion respectively stands in regard to affinity, then all 

 the verification that analogies can possibly give, will have 

 been attained. 



Analogies of the Sub-generic Types in the Genus 

 VOLUTA. 



Genera of the 



Typical Species. Analogical Characters. Volutinac, Sw. or 



VOLUTA Lam. 



V Neptuni (Ventricose; egg-shaped; spire] yi 



ivepiu, i very ghortj or uone J 



r Sub-ventricose ; spire more pro- ~) 

 4 duced; the bo" 

 C spire coronated. 



v c,. !, 5" Upper angle of the outer lip ad- \ rj nvn ,.i n 



V. Scapha. I vancing up the first spiral whorl, j Harp***. 



V. angulata. { S % y the apCX acute > and not } Volutilithes. 



rColumella lip thin and muchn 



V. magnified. s spread; shell sub-fusiform ; > Scaphella. 

 C spire short. j 



Four out of the five analogies of this table are so clear 

 and definite, that they scarcely require further illustra- 

 tion. We thus see how imperialis represents the bat 

 volutes; angulata, again, puts on the pointed spire of 

 Volutilithes; while magnifica connects Scaphella with 

 the melons. The analogy between Scapha and Harpula 

 (the heavy tuberculated species of the latter being the 

 true types), although less apparent on a cursory view, 

 is still very remarkable. The strong resemblance which 

 V. Scapha bears to a Strombus, must, indeed, strike the 

 most casual observer ; but, we confess, it was some time 

 before we discovered the singular character so prevalent 

 in all the Harpulee, or music volutes, where the outer 

 lip is extended up the first spiral whorl, a structure so 

 universal among the Strombida, ' or wing-shells, and 

 which is not found in any other group of the volutes. 

 To put this analogy, however, in a clearer, light, we shall 

 now compare the types with the great circle of the Zoo- 

 phaga. 



