60 THE AMPHINEURA 
IV. BIoNomics. 
The Neomeniomorpha are marine animals, living in depths of 
from 15 to 800 fathoms, but are most abundant in 50 fathoms. 
They inhabit oozy bottoms, and are found crawling on corals and 
hydroid zoophytes, on which they feed. They have been found 
in nearly all seas except the S.E. and N.W. Pacific and the 
S. Atlantic. The British genera are Neomenia, Rhopalomenia, and 
Myzomenia. About forty species, included in twenty genera, have 
been recorded up to the present time. 
V. Systematic REVIEW OF THE NEOMENIOMORPHA. 
Famity 1, Leprpomentmpar, Pruvot. Slender, tapering behind, 
with subventral cloacal orifice ; thin cuticle without papillae ; flattened 
spicules; no gills. | Genera— Lepidomenia, Kowalewsky and Marion. 
Fic. 40. 
Proneomenia gerlachei, left-side view. 6, mouth; cl, cloaca; si, foot-groove ; t, head. 
Ismenia, Pruvot. Ichthyodes, Pruvot. Stylomenia, Pruvot. Dondersia, 
Hubrecht. Nematomenia, Simroth. Myzomenia, Simroth. M. banyulensis, 
Pruvot. Mediterranean and Plymouth. 
Famity 2. NEOMENIIDAE, von Jhering. Short, trun- 
cated in front and behind ; cloacal orifice transverse ; 
gills present ; rather thin cuticle ; no radula. Genera— 
Neomenia, Tullberg. N. carinata, Tullberg. North 
Atlantic, N. and N.W. Scotland. Hemimenia, Nierstrasz. 
FAMILY 3. PRONEOMENIIDAE, Pruvot. Elongated, 
cylindrical, rounded at both ends; thick cuticle with 
acicular spicules; radula polystichous or wanting. 
Genera — Proneomenia, Hubrecht (Fig. 40). Amphi- 
menia, Thiele. Hchinomenia, Simroth. Rhopalomenia, 
Simroth. &. aglaopheniae. Mediterranean and Ply- 
mouth. Notomenia, Thiele. Pruvotia, Thiele. Stropho- 
Fria. 41. 
Paramenia cryo- eee Pruvot. 
phila, eee as- Famity 4. PARAMENIIDAE, Pruvot. Short, and 
pect. 6, mouth ; si : : : : . 
foot oeuive, **5 truncated in front ; thick cuticle (often without papillae) ; 
gills and radula present. Genera—Paramenia, Pruvot 
(Fig. 41). Macellomenia, Simroth. Pararhopalia, Simroth. Dino- 
menia, Nierstrasz. Cyclomenia, Nierstrasz. Proparamenia, Nierstrasz, 
Uneimenia, Nierstrasz. Kruppomenia, Nierstrasz. 
