731 
ZOOLOGICAL LITERATURE. 
new : — Amphitrite affinis (p. 376), A. intermedia (p. 370), A. palmata 
(p. 376), A. grcenlandica (p. 376), A. grayi (p. 377), A. johnstoni (p. 377), 
Terebella debilis (p. 378), T. danielsseni (p. 379). 
Baird (Joiirn, Linn. Soc. vol. viii.) describes as new species Terebella Jla^ 
bellum (p. 157), Narrow Island, Antarctic Region j and T. bilineata (p. 157), 
Falkland Islands. 
Dr. Johnston (/. c.) characterizes a new genus, Vemisia (p. 241), for the 
Sabella conchilega of Montague. The synonomy of this genus, however [Jide 
Malmgren), is ThelepuSy Leuckart, 1849 Lumaruiy Stimpson, 1855 j Ve^ 
nusia^ Johnston, 1865. 
Sabellacea. 
Malmgren (/. c.) describes the following new genera : — 
Laonome (p. 400)-. Corpus lineare elongatum subteres vix depressius- 
culum ano termiiiali. Sulcus ventralis conspicuus, etiam in dorso auterioris 
partis corporis distincte continuatus. Collare humile, branchiis non adpres- 
sum, dorso latissiine hians, laciniis ventralibus reflexis. Tubercula setigera 
a segmento secimdo h. e. postcollari incipientia setis in anteriore corporis 
parte biformibus : longioribus apice attenuate limbatis, brevioribus infra 
apicem acutum brevissimum utrinque tequaliter limbatis, peripheria limborum 
circulum describente j setis in posteriore corporis parte apice attenuato late 
limbatis, omnibus fere eadem forma. Tori unciuigeri a segmento secundo 
setigero incipientes uncinis per totum corpus uniserialibus avicularibus, ma- 
nubrio postice baud producto ut in Potamilla et Sabella. Branchiae utrinque 
semiorbem formantes inferiores broviores, appendicibus dorsualibus et punctis 
ocularibus carentes. Tentacula mediocria, utrinque unum, membranacea, 
cucullata, margiuibus conniventibiis, paulum attenuata obtusa. — S. krogeri, 
sp. n. 
Potamilla (p. 401). Corpus sublineare postice sensim attenuatum depres- 
siusculum ano termiiiali. Sulcus ventralis conspicuus, in dorso anterioris 
partis corporis baud continuatus. Collare humile dorso peiparum hians, 
laciniis ventralibus plerumque reflexis. Tubercula setigera a segmento 
collari incipientia setis in anteriore parte corporis biformibus : longioribus 
apice attenuato limbatis, brevioribus subspathnlatis, infra apicem brevissi- 
nium acuminatum utrinque ina3qualiter limbatis, limbo altero latiore qiiani 
altero. Tori unciuigeri a segmento secundo setigero incipientes uncinis 
in anteriore parte corporis biserialibus biformibus, altera serie aviciUaribus, 
altera apice dilatato ovato oblique acuminatis, in posteriore parte corporis 
niodo avicularibus uniserialibus. Branchim utrinque semiorbem formantes 
tantum ad basin connexse, appendicibus dorsualibus nullis, interdum punctis 
ocularibus prsedita3. Tentacula, unum utrinque, brevia lata compressa. — 
P. neglecta— Sabella ncglecta (Sars). ^ 
Euchone (p. 405). Corpus subteres sublineare postice perpaulo attenua- 
tum, apice acLimin.ato, rima ventrali longitudinali profunda plus minusve 
liiante per 8-12 ultima segmenta extensa. Anus ventralis in extrema parte 
rimm situs, subterminalis. Sulcus abdominalis bene conspicuus, etiam in 
dorso anterioris partis corporis plus minusve distincte continuatus. Collare 
humile vel mediocre branchiis non adpressum, dorso dimidiatum, lateraliter 
integrum, incisura ventrali plerumque brevissima. Anterior corporis pars 8 
segmentis composita infra sulco transverso bipartitis. Segmenta sequentia 
