PLATE 26 



178. Tractolira sparta Dall. Holotype, in the United 



States National Museum. Photograph through the 

 courtesy of that Institution. Specimen taken In 

 Gulf of Panama at I672 fathoms, p. 6I 



179. Boreomelon benthalis Dall. Holotype, In the United 



States National Museum. Photograph through the 

 courtesy of that Institution. Specimen taken in 

 Gulf of Panama at 1072 fathoms, p. 60 



180. Volutomltra alaskana Dall. Holotype, In the United 



States National Museum, Photograph through the 

 courtesy of that Institution. Specimen taken In 

 Bering Sea at 85 fathoms, p. 69 



181. Valuta ebraea Llnn^. Nucleus, much enlarged. 



Drawing by Dick Albany, p. 8 



182. Alclthoe fulietrum fulietrun^Brodevlp) . Nucleus 



much enlarged. Drawing by Dick Albany, p. 5I 

 185. Hamlllana mamtlla (Gray), Nucleus, enlarged. Draw- 

 ing by Dick Albany, p. ^+9 



184. Cymbium melo (Solander). Reduced In size, p. 47 



185. Aulica vesper tl I to vespertil to (Llnn^). Nucleus, 



much enlarged. Drawing by Dick Albany, p. k3 



