NEREIS, AUTOLYTUS 95 



Copeland and Wieman: The Chemical Sense and Feeding Behavior of 

 Nereis virens. Biol. Bull., vol xlvii, No. 4, October, 1924. 



Just: An Experimental Analysis of Fertilization in Platynereis mega- 

 lops. Biol. Bull., 28, 1915. 



: Breeding Habits of the Heteronereis Form of Heteronereis mega- 

 lops at Woods Hole. Biol. Bull., 27, 1914. 



A Cytological Study of Effects of Ultra-violet Light on the Egg 



of N. limbata. Zeit. Zellforsch., 17, 1933. 

 Lillie: Studies of Fertilization in Nereis. I. and II. Jour. Morph., 22, 



1911. III. and IV. Jour. Exp. Zool., 12, 1912. V. Jour. Exp. Zool., 



14, ms. 

 Lillie and Just: Breeding Habits of the Heteronereis Form of Nereis 



limbata at Woods Hole^Mass. Biol. Bull., 24, 1913. 

 Martin: Polymorphism and Asexual Reproduction in Dodecaceria. 



Biol. Bull., 65, 1933. 

 Mayer: The Annual Breeding-swarm of the Atlantic Palolo. Carnegie 



Inst. Pub., 102, 1908. 

 Sayles: Effects of Salinity Changes on Body Weight of N. virens. Biol. 



Bull., 69, 1935. 

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Cytology of the Annelid Body. Jour. Morph., 6, 1892. 

 Woodworth: The Palolo Worm, Eunice viridis. Bull. Mus. Comp. 



Zool., Harvard, 51, 1907. 



AUTOLYTUS CORNUTUS 



This polychaete lives in cylindrical tubes of its own con- 

 struction that it attaches to seaweeds and hydroids, and is 

 especially interesting because of its method of reproduction, 

 by budding. 



Study live and preserved specimens with the naked eye 

 and with the hand lens, in order to form a correct idea of its 

 natural color, size, and movements, and then study stained 

 specimens with the low power. 



1. Observe two individuals attached end to end. The 

 anterior one is a nonsexual zooid ^ (or original "stock") and 

 is giving rise to a new sexual zooid by budding. Counting 

 the peristomium as one somite, on what somite does the bud 

 begin and what does it represent? 



2. Study the head of the anterior, nonsexual zooid. Find 

 three prostomial tentacles. How are they arranged? Find 

 the eyes. How many pairs are there? Do you find palps? 



