ANNELIDA. 
599 
The work of Elilers_, being ehiefly devoted to new speeies, 
takes less heed of those already known to naturalists. Inciden- 
tal notices of many of these will be found, ^however, scattered 
through its pages. Besides his detailed account of the Syllidce, 
the author gives a complete list, accompanied with bibliogra- 
phical references, of the species of Euphrosyne and Syllis. 
Those of Et/phrosyne, ten in number, are further discriminated 
by means of short definitions. 
The following Polych(Bta are made the subject of comment 
by Claparede ; — 
. Polyophthahnus pictus (De Q.) ; AphUhina (Be Q.), two species ; Easy- 
hrnnehtts caducus (Gr.) ; Syllis gracilis (Or.) ; Syllides pidliger ( = Syllis pul- 
ligera, Krohn) 5 Splicerosyllis hystricc (Clap.); S. pusilla {=Exogone, sp., 
l)uj.) ; Odontosyllis fulgurans { — Syllis, sp., Aud., Edw.) ; Lumhriconereis 
unicornis (Gr.) ; Eunice harassii (A., E.) ; Micronereis variegaia (Clap.). 
The first of these species is the Nais picta of Dujardin, whose account of 
this Annelid, hitherto the only one accessible to the student, contained 
several errors. Grube refers it to Dero ; Quatrefages, with whom Cla- 
parede is disposed to agree, to Polyophthalmus. Perhaps it should form a new 
genus. Claparede gives a long description of its structure, showing it to be 
an undoubted Polychsetan, but, like Thysayioplea liictuosa (Schmidt) and 
Prilidium (Fr. Muller), tending to unite the characters of the two groups of 
setigerous worms. 
Earn. Terebellid^. 
Aphlehina. Hitherto little has been learned of this genus, the characters 
assigned it by De Quatrefages being only known from the short report of 
Milne-Ed wards (Ann. d. Sci. Nat. 1844, Zool. p. 6 ). ClaparMe describes 
two species of Aphlehina from Port Vendres, which he names provisionally 
A. hcematodes and A. pallida.. The latter differs but slightly from Polycirrus 
medusce (Gr.). Both are distinct from P. trilohatus (Sars). 
Earn. Cabitellid^. 
Claparede supports the opinion of Grube, that Notomastus and Dasy- 
hranclms should be united with Capitetla, to form a separate family. He 
insists also that these two genera are sufficiently distinguished, and should 
hot, as Grube suggests, be made into one. 
Earn. SyllidtE. 
Amended diagnoses are given of the following genera : Syllis (Sav.) ; 
Syllides (CErsted) ; SphecrosylHs (Clap.) ; Sylline (Gr.) ; Odontosyllis (Clap.) ; 
Ptef'osyllis (Clap.) ; and Aufolytus (Gr.). 
Earn. Eunicid^. 
Lumhriconereis unicornis (Gr.) is re-described. To Zygolohus (Gr.) 
Claparede would refer L. edwardsii, also L. tingens (Keferstein). Two 
species of Zygolohus occurred at Port Vendres, the one identical with Z. 
laurentianus (Gr.), while the other may receive the name of Z. gruhianus. 
L. quadristriata (Gr.), also found at Port Vendres, should probably be placed 
with these. 
