116 



R. C. PUNNETT. 



•Literature 

 (see below) 



Position of 



opening of 



cerebral organ 



Position of 

 cerebral organ 



Eyes 



Proboscis 

 nerves 



Gonidial pores 



Peculiar features 



D. crassus 

 ( = serraticollis) 



D. spectabilis 

 ( = rubrostriatus) 



D. lankesteri 



D. latus 

 D. oerinus 



D. massiliensis 

 D. igneus 

 D. albolineatus 

 D. lifuensis 

 D. willeyaiius 



D. borealis 



D. roseus 



(1), (2), (3), 

 (4), (5), (6) 



(1), (2), (3), 

 (4), (5), (6) 



(2) 



(4), (6), (7) 



(4), (6), and 

 this paper 



(5) 

 (6) 

 (6) 

 (8) 

 (8) 



(9) 



This paper 



Lateral 



Lateral 



Lateral, rather 

 dorsal 



Lateral and 

 rather ventral 



Lateral and 



slightly ventral 



Lateral 



Lateral 



Ventral 



Lateral 



Beside and 

 rather beyond 



brain 

 Behind brain 



Behind brain 



Beside and not 



behind brain 



Chiefly behind 



brain 



Beside and not 

 behind brain 



Beside and not 

 behind brain 



>30 



>30 



19—20 



24 



>30 



<30 



>30 

 >30 



<20 



<20 



>30 



>30 



14 



14 



>30 

 16 



14 



22 



1 lateral to 



each intestinal 



diverticulum 



2 ventral to 



each intestinal 



diverticulum 



1 ventro-lateral 



to each 



intestinal 



diverticulum 



Anterior rhyn- 



chocoelomic 



diverticula fuse. 



Nephridial jiore 



at post, end of 



nephridium 



Very long pos- 

 terior glandular 



process to 

 cerebral organ 



1 lateral to each 



intestinal 



diverticulum 



3 dorsal to 



each intestinal 



diverticulum 



Long posterior 



glandular 



process to 



cerebral organ 



Anterior rhyn- 



chocoelomic 

 diverticula fuse 

 and form ex- 

 pansions over 

 brain 



List of more important or more recent papers referring to the genus : — 



(1) Hubrecht, A. A. W. The genera of European Nemerteans critically revised. 



(2) H ibrecht, A. A. W. The Nemerteans, Challenner Reports, Vol. 19. 1887. 



(3) Joubin, L. Archie de Zool. Erp. et Gen. 1890. 



(4) Biirger, 0. Zeit. fiir wiss. Zool. 1890. 



(5) Joubin, L. Faune fram;aise. 1894. 



(6) Biirger, 0. Die Nemertinen. Fauna und Flora des Gol/es von Neapel. 1895. 



(7) Staub, J. Semon's Zoologische Forschungsreisen. 1900. 



(8) Punnett, B. C. WUley's Zoological Results, Pt. V. 1900. 



(9) Punnett, R. C. Proc. Zool. Soc. 1901. 



Notes. Leyden Mus. 1879. 



