316 Transactions,— Zoology. 
Genus Ommatoplea, Ehrenberg. 
Abranchiate; head entire; eyes many; proboscis terminal; mouth, 
subterminal; appendix none. 
O. HETEROPHTHALMA, Schmarda. 
Body depressed, tape-worm-like. Median line white, rest of the body 
red. Head indistinct, apex acuminate. Eyes in transverse lines. 
Under stones on the shore, Auckland. 
Genus Meckelia, Leuckart. 
Respiratory fissures two, longitudinal. Eyes none. Proboscis terminal. 
Mouth subterminal. 
M. macrostoma, Schmarda. 
Body depressed, greenish blue. Head attenuated. Fissures sub- 
terminal, short. Proboscis subterminal. Mouth oblongo-ovai, very broad. 
Auckland. 
M. macrorruocuma, Schmarda. 
Body rather flat, brownish olive. Head distinet, oblongo-lanceolate. 
Respiratory fissures as long as the mouth. 
Shores of New Zealand. 
Class GEPHYREA. 
Body cylindrical, with a thick coriaceous skin, often indistinctly ringed. 
Head not distinct from the body, often produced into a proboscis. 
Family Sipunculide. 
Cylindrical, mouth at the tip of a retractile proboscis, surrounded with 
tentacles, and often with hooks; anus dorsal; teeth none. 
Genus Sipunculus, Linnzus. 
Skin netted with anastomosing muscular fibres; proboscis short, with 
simple tentacles. 
S. mnzvs, Baird, P.Z.S., 1868, p. 81. 
Body eylindrieal, slender, attenuated anteriorly, posteriorly thick, fusi- 
form, retieulated, in the anterior portion corrugated, then smoother and 
minutely granulated ; caudal apex oval, smooth, shining; proboscis short, 
smooth, the anterior portion thicker than the body; colour white, shining 
bronze. Length, 64 in.; thickness of anterior part, 14 lines ; of posterior 
part, 4 lines; length of proboscis. 6 lines; thickness, 2 n New Zea- 
land (Mr. Cuming). 
Class ANNELIDA. 
Body composed of numerous, more or less similar, segments; limbs 
none, or rudimentary ; skin generally with chitinous bristles. 
Order Oricocmgr. 5 
a rudimentary; ño branchiæ; hermaphrodite ; mostly land or fresh 
