Arcnicola iiiarina 93 



Observations on the Hecokds. — The worms recurded and liguied 

 l»y Olal'st'ii and Povelsen as Linnhricu.s ruioridiH were specimens of 

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

 only species known from Iceland. L. 2Japill<MU>i, iirst descriljed briefly 

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

 by Quatrefages as a distinct species — Arcnicola papillosa — because 

 Fabricius htid referred to the presence of small appendages at the 

 base of the " rostrum " [prostomiumj. 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 l)y 

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

 nuchal epithelium. 



Lumbricus puncHs promliiulis, of the first edition of Linnaeus' 

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

 L. marinas. 



Of the records cited under Arcnicola piscatorum only a few 

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

 specimen collected by ]\Iiddendorff 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 -^4. ^i<6t7/«, 

 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 pudlla, 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 Mareialis from Sardinia, by ^Marshall from Nice, 

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

 accepted with caution until otlier specimens from these localities 

 have l)een examined and shown to belong to the species A. marina. 

 and not to A. pusilla. 



Several of the records oi Arcnicola piscatorum from the Mediter- 

 ranean and Adriatic almost certainly include A. pusilla, \i\\\c\\ occurs 

 in both seas, and are therefore placed under ''A. piscatorum, partimy 

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

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

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

 is a bottle containing specimens labelled " Arcnicola piscatorum. 



