o/Arenicola piscatortlm. 113 



of the development of the Branchiferons Annelides, I add a 

 tubular view, in families, gene?-a and species, of all those worms 

 whose earlier states have hitherto been observed, whether singly 

 or in complete series. The systematic arrangement is that of 

 Grube, in his ' Familien der Anneliden/ It shows how extremely 

 small, in comparison with the number of known species, is 

 that of the observations of their developmental forms, a number 

 however which would certainly be doubled, if we were acquainted 

 with the parentage of all the larvaj hitherto observed. 



Tabular View of those Branchiferons Annelides of which the Young 



States have already been observed. 

 Rapacia. 



Aphroditea . . Polynoe cirrata Sars, Wiegm. Arch. 1845, i. 



p. 11. 



Polynoe M. Miiller, Arch. 1851, p.323; 



Desor, Bost. Journ. vi. p. 12. 



EuNiCEA Eunice sanguinea .... Koch, Neue Denkschr. der 



schweiz. Gesellsch. viii. 

 Lycoridea . . Nereis diversicolor . . Schultze, in this paper. 



Nereis, sp. dub Milne-Edwards, Annalcs des 



Sci. Nat. 3 ser. iii. p. 166; 

 Busch, Beobachtungen, &c. 

 p. 69. tab. 9. figs. 11, 12. 



Phyllodocea. Phyllodoce, sp M. Miiller, Arch. 1855, p. 17, 



note. 

 Syllidea .... Syllis pulligera ^j^.g^jM Krohn, Wiegm. Arch. 1852, i. 



. i,' P-251. . 

 Autolytus prolifer. . . . Krohn, Wiegm. Arch. 1822, i. 

 p. 66; MuUer, Arch. 1855, 

 p. 489. 

 (Sacconereis helgolan- M. Miiller, Miill. Arch. 1855, 

 dica. p. 13; Schultze, in this 



paper. 

 Sacconereis Schultzii.) J. Miiller, Ueber den allgem. 

 Plan, in der Entwickelung 

 der Echinodermen,p. 7j note. 

 Cystonereis Edwardsii. Kolhker, in Koch, Neue 

 Denkschr. der schweiz. 

 Gesellsch. viii. p. 21. 

 Ewogene naidina .... Oersted, Wiegm. Arch. 1845, 



p. 20. 

 Exoffene Oerstedii and Kolliker, Neue Denkschr. der 

 cirrata, schweiz. Gesellsch. viii. pp. 



15, 22. 



Ariciea Nerine (Malacoceros) Leuckart*, Wiegm. Arch. 1855, 



longirostris. i.pp. 63 & 77 ; Busch, Beob. 



tab. 8. figs. 1-4. 

 Leucodore ciliata .... Oersted, Annul. Dan. Consp . 

 p. 39. tab. 6. fig. 96(?) ; 

 Frey and Leuckart, Beitrage, 

 &c.p. 98. tali, l.fig. 19(?). 



* See Annals, 2nd Series, xvi. p. 2a^> 

 Ann. §• Mar/. N. Hist. Ser. 2. Vol, xviii. 8 



