NO. 1772. ANNELIDS OF THE ARENICOLTDJE—ASHWORTH. 19 



Schmarda's record of A. piscatorum from the Bay of Paita (see 

 p. 8) is included by Ehlers under the species A. assimilis (Festschr, 

 Gottingen, p. 178). 



The variety affinis of A. assimilis is recorded from the following 

 stations on or near the American coast : 



Falkland Islands. J. H. Ashworth, Quart. Journ. Micr. Sci., vol. 46, 1903, pp. 

 764-772. 



Susanna Cove (Strait of Magellan). J, H. Ashworth, Mitth. Kongl. Zool. Mus. 

 Berlin, vol. 4, 1910, p. 352. 



The specimen on which the record of A. assimilis from Cahfornia 

 is based is in the Gottingen Museum and, by the courtesy of Professor 

 Ehlers, I have been permitted to examine it. Professor Ehlers in- 

 formed me that tliis is a duplicate from Professor Agassiz's collection, 

 which was sent to Gottingen to be examined. The remaining speci- 

 mens were returned to Professor Agassiz and are doubtless those 

 which I have at present in my hands from the Harvard collection 

 (bottle No. 91). I have compared the Gottingen specimen with the 

 Harvard examples and find that they agree in every respect. In 

 the former there are nineteen chsetigerous segments, the first of 

 the twelve pairs of gills is on the eighth segment; there are five pairs 

 of nephridia wliich open on the fifth to the ninth segments; there is 

 no nephridiopore on the fourth segment; the lateral lobes of the prosto- 

 mium are well developed, and in pigmentation and general appear- 

 ance this specimen agrees absolutely with the Harvard specimens of 

 A. claparedii from California (see p. 12). I have no hesitation, after 

 making this direct comparison, in confirming the opinion wliich I 

 expressed in 1903 '^ that Ehlers is in error in recording A. assimilis 

 from California; the record should be transferred to A. claparedii. 



It is very probable that Schmarda's specimen, regarded by Ehlers 

 as A. assimilis, was really A. claparedii; the point at which the 

 specimen was obtained (the Bay of Paita) is within the known range 

 of A. claparedii, but is over 3,000 miles north of the nearest station 

 from which A. assimilis has been recorded. 



Through the kindness of Doctor Michaelsen, of the Hamburg 

 Museum, I have been enabled to examine specimens of A. assimilis 

 from Punta Arenas, Lapataia Nueva, Uschuaia, and South Georgia, 

 and the specimens from Susanna Cove, now in the Koniglische Zoolo- 

 gisches IMuseum, Berlin, were recently entrusted to me for examina- 

 tion by Director Brauer. The examples from Punta Arenas, Uschuaia, 

 and South Georgia have twenty chsetigerous segments and are 

 typical specimens of A. assimilis, but those from Lapataia Nueva 

 and Susanna Cove— the original examples determined by Ehlers, 

 as the accompanying labels testify — have only nineteen segments 

 and are referable to the variety ajfinis. 



« Quart. Journ. Micr. Sci. vol. 46, 1903, p. 774. 



