Arenicolidae 25 



It is evident from the preceding pages that the Polychaeta form 

 is an order difficult to classify, and it must be admitted that none of 

 the classifications hitherto proposed surmounts the many difficulties 

 involved. It will therefore be preferable, in the present state of the 

 subject, to adopt the method of most recent workers on Polychaeta, 

 that is, to consider the families separately, and in such order as 

 convenience directs. The families placed in the sub-order Scoleci- 

 forraia seem especially to call for reconsideration ; but, until further 

 information is available with regard to some of them, particularly 

 the Chlorhaemidae and Opheliidae, nothing definite in the way of a 

 change of the constitution of the sub-order can be made. The 

 present Catalogue will place the knowledge of one of the families on 

 a broader basis and provide material which may be used in discussing 

 the affinities of this with other families of the sub-order. 



AKENICOLIDAE Johnston, 1835. 

 Telethusae 



Savigny, Syst. Annel. (1820), p. 95. 



Johnston, Catal. Worms Brit. Mus. (1865), p. 226. 



Levinsen, Vid. Medd. Naturh. Foren. Kjobenhavn (1833), p. 133. 



Telethusae, partim 



Latreille, Fam. nat. Kegne Anim. (1825), p. 244. 



Telethusa, partim 



Danielssen, K. Norske Vid. Selsk. Skr., iv (1859), p. 121. 

 Grube, Arch. Naturg., xvi Jahrg., i (1850), p. 322. 

 Schmarda, Neue wirbell. Thiere, i, 2 Half. (1861), p. 51. 



Thelethusidae 



Cunningham and Ramage, Trans. E. Soc. Edin., xxxiii (1888), p. 648. 



Arenicolidae 



Johnston, Loudon's Mag. Nat. Hist, viii (1835), p. 566; Ann. Mag. Nat. 



Hist., xvi (1845), p. 454. 



Ashworth, Liverpool Mar. Biol. Comm., Mem. xi (1904), p. 71. 

 Fuchs, Jenaische Zeits., xlii (1907), p. 388. 

 Gamble and Ashworth, Q. J. Micr. Sci., xliii (1900), p. 538. 

 Lo Bianco, Atti K. Accad. Sci. Fis. Mat. Napoli, v, ser. 2, no. xi (1893), p. 9. 



Arenicolidae, partim 



Johnston, Ann. Mag. Nat. Hist., iv (1840), p. 373. 



Ar^nicoliens 



Audouin et Edwards, Ann. Sci. Nat., xxx (1833), p. 418; Hist. nat. Litt. 



France, ii (1834), p. 282. 



Fauvel, Mem. Soc. Nation. Sci. Nat. Math. Cherbourg, xxxi (1899), p. 161. 

 Mesnil, Bull. Sci. France Belg., xxx (1897), p. 145. 

 Quatrefages, Hist. nat. Annel., ii (1865), p. 259. 



Arenicoliens, partim 



Edwards, in Lamarck's Hist. nat. Anim. s. Vert., 2 e Edit., v (1838), p. 513. 



