Arenicola marina 93 



OBSERVATIONS ON THE RECORDS. The worms recorded and figured 

 by Olafsen and PoVelsen as Lunibricus littoralis were specimens of 

 .Arenicola, and may be safely referred to A. marina, which is the 

 only species known from Iceland. L. papillosus, first described briefly 

 by Miiller, and afterwards in greater detail by Fabricius, was regarded 

 by Quatrefages as a distinct species Arenicola papillosa because 

 Fabricius had referred to the presence of small appendages at the 

 base of the " rostrum " [prostomium]. The remainder of the 

 description given by Fabricius (see p. 91) accords so accurately with 

 A. marina, which is the only species known from Greenland, that 

 there need be no hesitation in referring the record to this species. 

 The appendages, on the presence of which emphasis was laid by 

 Quatrefages, were either the papillae of the upper lip or the everted 

 nuchal epithelium. 



Lumbricus punctis prominulis, of the first edition of Linnaeus' 

 Fauna Suecica, was given in the later edition as a synonym of 

 L. marinus. 



Of the records cited under Arenicola piscatorum only a few 

 require comment. Grube (1851) recorded under this name a single 

 specimen collected by Middendorff during his journey "in den 

 aussersten norden und osten Sibiriens." The record is placed here 

 provisionally, for if the specimen was found on the east coast of 

 Siberia it was taken close to the area of distribution of A . pusilla, 

 and may have belonged to this species. Grube stated that the 

 specimen was about two inches long, and possessed only eighteen 

 chaetiferous segments and twelve pairs of gills, which numbers are 

 not normal for either A. marina or pusilla, or indeed for any other 

 known species. The specimen probably belonged to one of these 

 species, but exhibited reduction in the number of segments and gills. 



The records by Marcialis from Sardinia, by Marshall from Nice, 

 by Payraudeau from Corsica, and by Verany from Genoa, should be 

 accepted with caution until other specimens from these localities 

 have been examined and shown to belong to the species A. marina 

 and not to A. pusilla. 



Several of the records of Arenicola piscatorum from the Mediter- 

 ranean and Adriatic almost certainly include A. pusilla, which occurs 

 in both seas, and are therefore placed under "A. piscatorum, partim." 

 Grube referred specimens from Italy and Sicily (1838), and from the 

 Mediterranean generally (1840), to the species A. piscatorum. In the 

 " Collection Grube " in the Kgl. Zoologisches Museum, Berlin, there 

 is a bottle containing specimens labelled " Arenicola piscatorum. 



