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Vol. VIII. DETROIT, FEBRUARY. 1888. No. 2 



ORIGINAL COMMUNICATIONS. 



NOTES ON TWO PRESUMABLY UNDESCRIBED AQUATIC 



WORMS. 



DK. ALFRED C. STOKES. 



PLATE II. 



I. 



^ I HE aquatic worms of this country form a large group of 

 -'- animals demanding the use of the microscope for the elucida- 

 tion of their structure; yet, although they are abundant and attrac- 

 tive, they have received but little attention. Those extremely inter- 

 esting annelida which j are classed together under the suborder 

 Oligochseta have been studied by a still more limited number. Dr. 

 Joseph Leidy has increased our knowledge of certain genera and 

 species, and Dr. Gustaf Eisen has been a careful and successful 

 investigator, describing several wonderful and previously unknown 

 forms, notably the type of a new family group (Eclipidrilidae), the 

 worm having its habitat in the high Sierra Nevada of California, 

 at an altitude of ten thousand feet or more. In reference to 

 the detailed anatomy and histology of any Oligochsete, I am 

 acquainted with but one paper, that on Aulophorus vagus, Leidy., 

 published in the Proceedings of the American Academy of Arts and 

 Sciences for October, 1884, by Mr. Jacob Reighard. Further than 

 this little has been done. The field is, therefore, almost entirely 

 uncultivated, and, presenting, as it does, an almost undisturbed sur- 

 face, it awaits the coming of the scientific investigator, being ready 

 to respond to his slightest touch, and to reward him most abundantly 

 for a little patient attention. 



