INDEX TO VOL. XXXI, 



NEW SERIES. 



Acanthodrilus, anal uepridia of, 467 

 A.mphioxus, development of its atrial 



chamber, by Lankester and Willey, 



445 

 „ excretory tubules of, by 



Weiss, 489 

 Arachnids, the origin of vertebrates 



from, by Patten, 317 

 Atrial chamber of Amphioxus, its 



development, by Lankester and 



Willey, 445 



Beddard on Deodrilus and on anal 

 nephridia in Acanthodrilus, 467 

 „ on the structure of au earth- 

 worm belonging to the genus 

 Diachseta, 159 



Benham on the classification of Earth- 

 worms, 201 



Bourne, A. G., on Chsetobranchus, a 

 new genus of oligochaetous Chseto- 

 poda, 83 



Buchanan, F., on Hekaterobrauchus, 

 a new genus of Spiouidae, 175 



Biitschli's imitation of protoplasmic 

 movement, 99 



Cerata of Nudibrancb Mollusca, by 



Herdmau, 41 

 Chaetobranchus, a new genus of 



oligochffitous Chsctopoda, by A. G. 



Bourne, 83 



Deodrilus, Beddard on, 467 

 Diachseta, a species of, by Beddard, 

 159 



Earthworm of the genus Diachteta, 



by Beddard, 159 

 Earthworms, au attempt to classify, 



by W. B. Benham, 201 

 Embryology of Mammalia, by Hu- 



breeht, 499 

 „ of Scorpion, by Laurie, 



105 

 Eyes of Arthropoda, morphology of, 



by Watase, 143 



Gaskell on the origin of Vertebrates 

 from a Crustacean-like ancestor, 379 



Haycraft on terminations of nerves in 

 tortoise-shell, 563 



Hekaterobrauchus Shrubsolii, 

 a new genus and species of Spionidfe, 

 by F, Buchanan, 175 



Herdman on the cerata of Nudibrancb 

 Mollusca, 41 



Hubrecht, studies in mammalian em- 

 bryology. No. II, 499 



Lankester and Willey on the develop- 

 ment of the atrial chamber of 

 Amphioxus, 445 



Laurie on the embryology of a Scor- 

 pion, 105 



