10 PBOCEEDINOS OF THE NATIONAL MUSEUM. vol.39. 



nephridia, in both specimens, is in contact at its anterior end with the 

 third septum, but in none of them could a nephridial funnel be seen 

 on the anterior face of this septum. Possibly these nephridia were, 

 in life, not provided with funnels, i. e., they were incomplete or 

 reduced, as not uncommonly happens in the case of the corresponding 

 first nephridium in A. marina, but the very defective preservation of 

 the specimens does not permit me to determine this point decisively. 

 The vesicles of some of the other nephridia are strongly dilated; a 

 similar condition has been observed in the nephridial vesicles of other 

 species of Arenicola in the breeding season. The condition of the 

 nephridial vesicles suggests that the specimens were sexually mature. 

 They were collected on June 17, 1900. 



The records of A. marina from Vancouver Island, Puget Sound, 

 and Puerto Montt are shown above to be invalid; the specimens on 

 which the records were founded have been re-examined and shown to 

 belong to the species A. clajjaredii, under which they are now to be 

 recorded. (See p. 12, footnote h, and p. 14.) Schmarda's record of 

 A. jnscatorum from the Bay of Paita should also no longer be credited 

 to this species, but probably to A. clajjaredii, and Grube's record of 

 A. jnscatorum from Callao should be accepted with reserve. There 

 is therefore no certain record of the occurrence of A. marina on the 

 west coast of North or South America. 



I have examined specimens of A. marina from the following stations 

 on the eastern coast of North America: 



Rigolet, Labrador. [83.] 



Cape Breton, Nova Scotia. [23662.] 



Halifax, Nova Scotia. [8931.] 



Eastport, Maine. [546, 587.] 



Gloucester, Massachusetts. [9365, 9368.] 



Provincetown, Massachusetts. [219.] " 



Barnstable, Massachusetts. [No number.] 



Woods Hole, Massachusetts. 



Buzzard's Bay, Massachusetts. [9367.] 

 All the specimens, except those from Woods Hole, are in the col- 

 lection of the U. S. National Museum. The numbers in brackets 

 are the registration numbers. 



Before leaving the consideration of this species of Arenicola, I wish 

 to refer briefly to a specimen in the collection of the Zoological Insti- 



a Webster and Benedict (U. S. Comm. Fish and Fisheries, part 9, Rept. Com- 

 missioner for 1881, p. 725, Washington, 1884) state that A. marina was not found at 

 Provincetown or at Wellfleet although it was carefully looked for, but the former 

 author evidently made a further and successful search, for the bottle No. 219, which 

 contains nineteen specimens, bears the note "From H. E. Webster." 



