ANNELIDA. 
727 
Neueidea. 
Malmgren describes (/. c.) the following new genera : — 
Ipldncrcis^ p. 181 {Ilcter Mereis, Oersted p. p.) Corpus lineare ut in Iletc- 
ronereidibus ex duabiis partibus valde difformibus constans : pars antica sub- 
teres pedibus brevibiis absque laniellis, setis compositis, falcatis et spinosis 5 
pars postica lateribus profunde incisis, pedibus laniellis praiditis, setis compo- 
sitis solumniodo cultratis. Proboscis exserta maxillis duabus et pectinibus mi- 
nutis transversalibus nigrescentibus gregatim et annulatim dispositis, e 
nodiilis corneis cylindrico-conicis conuatis constantibus. Lobus ceplialicus 
suborbiculatus, paullo latiorquam longior, basileviter emarginata vel cordata^ 
margine antico subarcuato, oculis 4 adniodum magnis. Cirri duo anales sub 
ano. — I.fucicola (Oersted). > 
Eimereis, p. 182 {Ileteronereisj Oersted p. p.). Corpus lineare ex duabus 
partibus difformibus constans, ut in Ileteronereidibus, pars antica corporis pe- 
dibus absque lamellis, setis compositis solummodo spinosis; pars postica 
pedibus lamellis prreditis, setis compositis, modo cultratis in mare, in feniina 
auteni cultratis et spinosis. Proboscis exserta maxillis duabus validis modo 
ad basin obsolete crenulatis armata, nodulis corneis conicis dentiformibus 
minimis aut oranino evanescentibus. Lobus ceplialicus e basi subrectangulari 
lata conico-attenuatus, apice truncate. Oculi 4 mediocres in parte basali lobi 
cephalici. Cirri anales duo sub ano. — E. lomjisdma (Johnston). 
Syllidea. 
Autohjtm. The species of this genus exhibit a most striking polymorphism, 
the males being so different from the females as to have been referred to 
distinct genera; and, in addition, there is now found to exist a third form, 
which is a sexual, producing the sexual individuals by gemmation at its poste- 
rior extremity. Agassiz, /, c. p. 343. 
Tetraglene rosea (Grube). Prof. Grube (Jahresber. Schles. Gesellsch. 
Breslau, 1864, p. 67) describes an alternation of generations occurring in this 
species. 
Gattiola, g. n., Johnston (/. c. p. 195). Body consisting of about fifteen 
segments, deeply indented at the sutures and narrowed in front ; head small, 
flattened, rounded and entire in front, with three long filiform unjointed an- 
tennfB and two lobe-like processes on the occiput ; eyes four, the pairs 
coalescent so that there are apparently two only ; tentacular cirri two pairs, 
similar to the antennfe ; foot uniramous, the dorsal cirrus filiform and greatly 
elongated ; the bristles compound, falcate ; anal segment small, with two elon- 
gated styles. — G. spectahilis, Johnst. This genus was published in 1861 
by Dr. Baird, in article ‘SVnnelida ” in ^ Museum of Natural History,’ vol. ii. 
p. 298 (note). 
II ESIONEA. 
MicroplitTialmm, g. n., Mecznikow, Zeitschr. wiss. Zool. 1865, p. 334. 
This annelid is 2-3 millims. in length ; the body consists of about 33 somites ; 
the cephalic segment carries five tentacles, the two middle larger than the 
other three ; on each side of the head are a pair of very small eyes. Tenta- 
cular cirri one pair on either side, the dorsal cirrus scarcely larger than the 
ventral one ; the first three somites after the head carry no bristles ; the cirri 
