186 OBSERVATIONS 
Arenicola piscatorum (Müllers’ Archiv. f. Anat., p. 
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1856 Srimpson. On some remarkable marine invertebrates inha- 
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1880 Sroru. Bidrag til Throndhjems fjordens Fauna-Annelider 
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1885 Vrazcanes. Endothelium du Lombrie et de l’Arénicole (An. 
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1888 Vocr er Yunc. Traité d'anatomie comparée pratique (Vol. 4. 
p. 481-514, fig. 242-254). 
1879 Wessrer. Annelida Chætopoda of New-Jersey (32 Report 
of N. Ÿ. State Museum, p. 198). 
1880 Wizson. Preliminary abstract of observations upon the ear- 
ly stages of some Polychaetous Annelides (Zoo!. An- 
zeiger). 
1882 Wizsox. Observations of the early developmental stages of 
some Polychaetous Annelids (Stud. Biol. Lab. John 
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1887 Wirex À. Beitraege zur Anatomie und Histologie der limi- 
voren Anneliden (K. Svenska Vetensk. Akad. Han- 
dlg., t. XXIL, n° 1, Stockholm). 
nn on 
