548 
ZOOLOGICAL LITERATURE. 
Sahella alticolliSj sp. n., Grube, 1. c. p. 638, Taf. 7. fig. 6. 
Serpula (Uupomatus) heterocei'os, sp. n., Grube, 1. c. p. 639, Taf. 7 . fig. 8. 
S. gervaisu, Qtrfg. P, Grube, 1. c. p. 640, Taf. 7. fig. 7. * ‘ 
ANNELIDA OLIGOCIIiETA. 
Vaillant (/. c.) proposes the following arrangement of the 
Order Annelida Lumbricina=01igoch8eta : — 
Setae simple (Lumhricind). 
Setae isolated or grouped two by two * Lumbricina propria. 
Setae three or four in number, in bundles .... Enciiytraeina. 
Set(o bifid or hair-like, at least partly, rarely pectinated (Naidea). 
Setae in four rows, exceptionally biserial, and then all hair-like. 
‘ Naidea propria. 
Setae biserial, never hair-like Oha:togastrina. 
Family I. LUMBRICINA. 
Tribe I. Lumbricina propria. 
One row of setae on the dorsal line, at least anteriorly. 
Setae very numerous, regularly distributed round the body. 
Perichcsta, Schmarda. 
Setae very numerous, collected together on the papillae at the dorsal region. 
Megascolex, Templetonf. 
Setae nine or more in number on each ring, alternating longitudinally 
from ring to ring Pontoscolex, Schmarda. 
Setae nine or more in number on each ring, in regular longitudinal series, 
Ilgpogceon, Savigny. 
No setae on each dorsal line. 
On each ring 20 setae in four groups Echinodrilus^ gen. nov. 
On each ring 8 setae. 
Receptac. semin. in advance of deferent canals. 
No lateral vessels to caeca. 
Cephalic lobe distinct, with a posterior prolongation entering 
more or less the first setigerous ring Lwnbricus, Linn(5. 
Cephalic lobe distinct, no posterior prolongation. 
Ilelodrihis, Iloffineister. • 
Cephalic lobe attached to the first setigerous ring. 
Ci'iodrilm, IIofFmeister. 
Lateral vessels to caeca contractile .... Enaxes, Grube. 
Receptac. semin. behind the deferent canals. Tnchodrilics, Claparede. 
On each ring 4 setae Phreoryctes, Hofiineister. 
* Echinohnlus multispinus, Grube, is an exception ; the setae are here united 
6 by 5 j but its general characters are too much those of the true Lumbricina 
for it to be placed elsewhere. 
t A genus little known, which had better perhaps be placed as incertae 
sedis.” 
