240 Mr. J. W. Pryde on Annelida Polychceta 



Cirratulidse, and Spionidse. Most o£ the families are repre- 

 sented by one genus and one species only ; but in the 

 ChlorgemidjB two genera, viz. Stylariuides and Brada, occur. 

 The numbers of each species vary very much, and only 

 in two cases, viz. Anwiotrypane aidogaster and Stylarioides 

 plumosa, do they exceed twenty-two examples. These num- 

 berSj therefore, differ greatly from those published in Part III. 

 of the Report *, where one species, viz. IlyaUncecia tubicola, 

 was represented by 649 specimens and 755 tubes. No 

 annelids were obtained in the tubes of the Chajtopteridge, 

 notwithstanding that these are fairly numerous in this 

 collection. The Spionidse, a family renowned for its varieties 

 and for the difficulties one encounters in distineuishino; its 

 many species, have only one representative, viz. Scolecolejn's 

 vulgaris, and the absence of the other forms may be accounted 

 for by the fact that the members prefer a littoral to a deep- 

 sea habitat. In some families, e. g. Cirratulidse, there is 

 only one small representative, and it is interesting to note 

 the slight differences which exist between this solitary 

 specimen and the adult form. 



No lists of synonyms have been given, but they can be 

 obtained from Prof. M'Intosh's * Monograph ' under the heads 

 of the various species. As already stated, the specimens 

 were those belonging to the collection handed over to 

 Mr. \\^. Small, M.A., B.Sc, by Prof. D'Arcy Thompson. 

 In conclusion, I have to thank Prof. W. C. M'Intosh for his 

 kindness in assisting me when I was in difficulties, and in 

 giving me, from his own collection, a typical series of slides 

 of each group. 



Family Goniadidae. 



Genus GONIADA, AuJouiii and Edwards. 



Goniada maculata, (Ersted, 1843. 



Only one small specimen, scarcely half an inch long, is 

 the representative of the genus and species. It was obtained 

 at Station 41 B at a depth of 15 fathoms, and was dredged 

 along with Megalia assimids. This form has a very wide 

 range, and has been found from littoral waters to a depth of 

 795 fathoms (' Porcupine ' Expedition of 1870). It is 

 prevalent in the shallow waters of the North Sea, and extends 

 to North American and Canadian waters. No member of 

 the genus was obtained by the ' Challenger,' but at Station 

 167 A in 10 fathoms the only representative of the family, 



* Vide Ann. & Mag-. Nat. Hist. ser. 8, vol. xiv. p. 289 (October 1914). 



