INDEX TO POLYPLACOPHORA. 



Note. — The names of genera and other groups are printed in 

 Small capitals ; of species known or supposed to be valid in 

 Roman type ; the names of all synonyms in Italic. 



18 



7,8 



6 



150 



Abyssorum Sars, xiv, 

 Acanthoch(Etes Auct. xv, 

 Acanthochistes Costa, xv, 



ACANTHOCHITES RisSO, XV, 

 ACANTHOCHITID^ Pils. XV, 



Acanthochitona Gray, xiv, . 



Acanthochitou Herrm. xv, . 8 



ACANTHOPLEURA G U i 1 d. 



xiv, . . . .213 



Achates Gld. xv, . . 18 



AchaUnus Brown, xiv, . 49 



Acrior Cpr. xiv. . . 61 



Aculeatiis L. xiv, . .221 



Acvleatus Rve. xiv, . .219 



AcutiUratus Rv. xiv, . . 65 



Acutirostratus Rv. xv, . 33 



Acutus Cpr. xiv, . . 297 



A.damsii Cpr. xiv, . .111 



Adansoni Roch. xv, . .13 



Adelaidensis Rv. xiv, . 136 



Adenensis Smith, xiv, . 276 



Adriella Thiele, xv, . 62, 63 



jEneus Risso. xv, . , 10 



JEreus Rv. xiv, . .179 



Affinis Issel xiv, . . 181 



AfraRoch. XV, . . 96 



J fricana Roch. xiv, . . 181 



Ahnni Roch. xv, . .112 



Alatus Sowb. xiv, . . 60 



Albidus Blv. xv, . . 105 



Albilineatus Rv. xiv, . . 160 



Albolineatus Sowb. xiv, . 160 



Alhrechti Schr. xiv, . 147 



^^6ws Barb, xiv, . . 256 



Albus L. xiv, 70 ; xv, . 64 



XV, 



XV, 



Albus Pult. xiv, 

 Aleutica Dall, xv, 

 Algesirensis Cap. XV, . 

 Alphonsinte Roch. xv, 

 Alternatus Sowb. xiv, 

 Altior Cpr. XV, 

 Altus Gray, xiv, 

 Alveolatum Roch. 

 Alveolus Sars xiv, 

 Amaurochifon Th, 

 Ametrogephyrus Midd. xv. 

 Amicorum Baird. xiv, 

 Amicula Gray, xv, . 

 Amiculatus Pall, xv, . 

 Amiculatus Rv. xv, 

 Amiculatns Sowb. xv, 

 Amphitomur.^ Pils. xiv, . 

 Ampullaceus Pils. xv, 

 Anaglyptus Roch. xv, 

 Angasi Ad. & Ang. xiv, 

 Angasia Cpr. xiv, 

 Angulatus Spengl. xv, 

 Angusticostatus Q. & G. 

 xiv, . . . . 



Anisochiton Fisch. xiv, 

 AnthocMion Th. xv, 

 Antiquus Rve. xiv, 

 Apicalis Pils. xv, 

 Apiculata Say, xiv, 

 Apparata Cpr. xiv, 

 Aquatilis Rv. xiv, 

 Arbutum Rv. xiv, 

 Arcticus Sars, xiv, 

 Arenatus Nutt. xiv, 

 Argyrosticta Phil, xiv. 



4 



65 

 62 



100 



281 

 45 

 60 

 96 



6,4 

 88 

 52 



249 

 42 

 46 

 44 

 49 



230 

 24 

 97 



238 



286 

 72 



187 



xxi 



88 



274 



50 



35 



38 



169 



139 



5 



295 



204 



122 



