94 A renicolidae 



Mittelmeer," possibly some of those mentioned in the two memoirs 

 cited. These specimens belong to the species A. pusilla (see the 

 writer's paper on this collection, 1910). Schmarda (1861) stated 

 that he found in the Mediterranean, the Channel and on the coast of 

 the Pacific the same species, A. piscatorum ; but from a subsequent 

 statement in his description it is clear that the Pacific examples were 

 not of this species. 1 Vogt and Yung mention that the examples of 

 A. piscatorum from Naples are smaller than those from the Channel 

 and North Sea. The former are examples of A. pusilla. It should 

 be borne in mind, when considering these records, that it was not 

 until 1883 that Dr. Levinsen pointed out the characters which 

 distinguish A. daparedii (= pusilla) from A. marina, and that about 

 fifteen years elapsed before the former species was generally accepted. 

 Up to the time of Dr. Levinsen's memoir all specimens of Arenicola 

 with nineteen segments and thirteen pairs of gills had been referred 

 to the species A. marina, and this practice prevailed, with only one 

 or two exceptions, until almost the end of last century. 



Passing to the records under Arenicola marina, the writer has 

 identified, as belonging to this species, specimens in the Kgl. 

 Zoologisches Museum, Berlin, with labels indicating that they were 

 collected in the Marquesas and Kingsmill (Gilbert) Islands ; but as 

 the information is regarded as being a little uncertain, the records 

 are stated under reserve. The writer's record from Chile rests upon 

 a specimen, in the collection of the Zoological Institute of Vienna, 

 which Prof. K. Grobben kindly sent for examination. The label 

 reads " Arenicola piscatorum, Chile." Although the specimen is not 

 in a good state of preservation, it can be identified with certainty as 

 A. marina. There is, unfortunately, no other information as to the 

 history or exact place of capture of the worm. If it be from Chile 

 it is, so far as the writer is aware, the only specimen of A. marina 

 from the west coast of America, and before this species is regarded as 

 a constituent of the fauna of that coast it is desirable that other 

 examples be procured therefrom. 



Ives referred all specimens of Arenicola with six pre-branchial 

 and thirteen branchial segments to "A. marina," which was thus 

 made to comprise several species. The localities cited show that, 

 besides A. marina, there were included A. glacialis, pusilla, assimilis 

 var. affinis, and possibly A. lovcni. The examples placed by Prof, von 

 Marenzeller under "A. marina" have been shown by the writer to 



1 For remarks on these specimens, see p. 120. 



