86 



to those of the adults (De St. josepli). Even the crustuceiiii 

 parasites on the body in the regions thus widely separated have 

 a parallelism as shown in the account of the South African 

 form which follows. Both males and females occur on the 

 branchifC of large specimens as well as on the body, 



De St. Joseph found the sexual elements developed at the 

 •end of September, the eggs being ciomm. in diameter, and the 

 sperms very minute. He states that these elements escape by 

 the pores of the segmental organs at the ventral base of the 

 setigerous lobe. A young specimen of seven mm, had nine 

 thoracic and nineteen abdominal. Its branchiae (few in 

 number) formed spirals.* 



SaBELLIPHILUS (?) BISPIR^. 



Crustacean parasites of annelids have been known to 

 zoologists since Kroyerj in 1837 described Scliiis Jrilobiis as 

 frequenting Lcpidoiiotiis sqiuniiatiis, L. The same author next 

 year found another on Hctnuotlio'c iiiibriaifa, L. which lie pro- 

 visionally termed Silciiimii Polyiioi-s, but delay in publishing a 

 description caused Steenstrup and Liitken, with Kroyer's con- 

 sent, to substitute the title Hcrpyllobius arciicus for this crus- 

 tacean. Sars| next contributed a description of four new 

 species, viz., Te rebel I i coin, irplaiis on Terebclla deb His, Malmgren, 

 Sabellacheres giacilis, on Myxicola Steeiislrnpi, Kr., Sabelliphiliis 

 eloiii^dliisonSdbella pei7'oiiiiiei,'dnc\ ChoHiep/iiliiscl/spar on Euchoiie 

 papulosa, Sars. Keferstein in i863§ gave an account of Nereieola 

 ovata occurring on Nereis ciillrifeia, Grube, and the author and 

 Grube likewise noticed the same form which is not uncommon 

 in the Channel Islands. In 18(34 Nordman || found a new 

 copepod on Xicoiiiaclie liimbricalis, and he termed it Doiiiitsa 

 iiyiiieiiicola. A few years later Hesse H in his account of new 

 crustaceans from the shores of Fr3.nce described Clielodinifoi mi 

 iypiciis from the lob-worm (Aieiiicola marina, L. ). Claparede * 

 the following year gave a resume of the literature of the subject 

 lip to date, as a preface to his description of a new species, 

 SabellipJiilus Sarsi on Spirograpliis Spallanzaiii, Viviani. Three 

 additional species were described by the veteran naturalist,tt Sars, 

 the same year, viz., MeliiiiiacJieres ergasilo'ides on Mel in 11 a crisfaia, 

 Sars; Hepyllobins crassirostris on Evartie inipar, Johnston; and 



*Op. cit., p. 291. 



t Xaturhist. Tidsskrift, iste K. I. Kjobenhavn. 



X Forhandl. Vidcnsk. Selsk. I. Christiania, 1861, p. 46 (sep. copy). 



JjZeit. f. w. Zool. XII. Bd. 

 • II Bullet. Acad. St. Petersb. 1864. 

 4 Ann. Sc. Nat. 5th Ser. XI. p. 275. }869. 



** Ann. Sc. Nat. 50 Ser. .xiii. Note p. i, PI. 7. 



It Xyt. Mag. Nat. Bd. xvii. 1870. 





