Gattxj Marine Laboratory^ St. Andreios. 57 



in 1874. A comparison -with specimens of the species from 

 various localities shows that it is only a variety of this "widely 

 distributed form. 



7. On the Form described as Ilcmipodus (?) magellanicus in 

 the Annelids of the ' Challenger ' ^. 



This remarkable type of the Glyceridse requires, as indi- 

 cated by the query in the ' Challenger ' volume, a new geueric 

 name, since it so materially diverges from Henilpodus, De 

 Quatrcfages, and also from the types of Kinberg and Schmarda. 

 It is difficult to see why Ehlers f has grouped these diflerent 

 forms under his Hernlpodia magellanica, Kinberg; for Kin- 

 berg's type, like that of De Quatrcfages, whom he followed, 

 had essentially a simple foot (iSchmarda's Monosticha) with 

 a single spine and one kind of bristles, whereas the form 

 described in the ' Challenger,^ whilst having a simple foot in 

 frout, had a bifid one throughout the rest of the body, and 

 two kinds of bristles. The structure of the head of the 

 ' Challenger^ species also diverges from that of the types of 

 De Quatrefages and Kinberg. The term Breviglycera magel- 

 lanica was therefore suggested as more appropriate. Now, 

 however, Arwidsson^s paper J has priority, and his generic 

 name of Glycerella may be accepted for this peculiar type, 

 all the features of which were duly pointed out in the 

 ' Challenger ' volume. 



EXPLANATION OF PLATE IV. 



Fig. 1. Posterior foot of Goniada pallida, Arwidsson. Magnified about 



50 diam. 

 Fi(j. 2. T«'o compound bristles of the same species. Magnified, Zeiss 



oc. 2, obj. D. 

 Fi(/. 3. One of tbe denticles of tbe foregoing. Magnified. 

 Fiff. 4. PapiUie of the proboscis of iZi???u};oc?MS5iW!^/e.i-,Grube. Magnified. 

 Fig. 5. Tenth foot of Goniada tioriegica, GUvst., ivom the St. Lawrence. 



Magnified. 

 Fiff. 6. Ninetieth foot of the foregoing. Similarly magnified. 

 Fiff. 7. Ninetieth foot of Glycera dibnuichiata, Ehlers. Magnified. 



* Op. cit. p. 349, pi. xlii. figs. 11-15, pi. xxii. A. figs. 12-15, pi. xxxv. A. 

 figs. 5-7. 



t Hamburger MagalhaensischenSammelreise, Polychseten, p. 81 (1897). 

 X Bergens Mus. Aarbog, 1898, li. p. 2G, tigs. 22 & bl. 



