MOLLUSCOIDA. 
597 
but there is a separate opening into, the incubatory pouch, which he con- 
founded with the oral opening. 
Also see the remarlrs of Nitscho on this subject. 
Beania mh'nhilis. F. Roper records the occurrence of this Polyzoon at 
Eastbourne, Sussex. Ann. and Mag. N. Hist. ser. 4, vol. iv. Oct. 1869, p. 293. 
Also recorded by H. Lee as occurring at Shanklin, Isle of Wight, ibid., 
Nov. 1869, p. 367. 
Betihornera^ g. n., Kirchenpauer, 1. c. p. xxix. Stem calcareous, inflexible, 
erect, forming a network ; cells depressed, only on one side of the stem, 
almost tube-shaped; oral opening tube-like, projecting, somewhat curved. 
R. gracffd, sp. n., Kirchenpauer, 1. c. p. xxx, Fiji Islands; R. sp. n., 
Kirchenpauer, 1. c. p. xxx, Fiji; R. plicata, sp. n., Kirchenpauer, 1. c. 
p. xxxi, and R. parasitica, sp. n., Kirchenpauer, 1. c. p. xxxi, both from 
Gulf of St. Vincent; R. dentata, sp. n., and R. corhicula, sp. n., Kirchenpauer, 
1. c. p. xxxii, both from Bass’s Strait. 
Salicorfiaria jnlosa, sp. n., Kirchenpauer, 1. c. p. xxvi. South Australia. 
Onchopora salicornioidcs, sp. n., Kirchenpauer, 1. c. p. xxvii, Fiji. 
Farchninaria punctata, sp. n., Kirchenpauer, 1. c. p. xxvii, South Africa, 
nearly related to F. Jlcxilis, Busk. 
Eschara spongiceformis, sp. n., Kinchenpauer, 1. c. p. xxviii, Australia; 
E. reniformis, sp. n., Kirchenpauer, 1. c. p. xxviii, Bass’s Strait. 
Ilornera australis, sp. n., Kirchenpauer, 1. c. p. xxxiii, Bass’s Strait. 
Idmonea Jiabellata, sp. n., Kirchenpauer, 1. c. p. xxxiii, Gulf St. Vincent. 
Serinlaria ( Vesicularia ?) semispiralis, sp. n., Kirchenpauer, 1. c. p. xxxiv, 
Samoa. 
Memhraniiwra hengalensis, Stoliczka, l.c. p. 66, pi. 12, found, with 
Sagartia schilleriana, in a tank of brackish water, and all along the river 
Mutlah. 
Rhabdopleura, g. n., Allman, l.c. p. 68. Coenoccium consisting of a branched, 
adherent, membranous tube, in whose walls, along their adherent side, a rigid 
chitinous rod extends, and whose branches terminate each in a free open 
tube, through which the polypidcs emerge. Lophopliore hippocrepical, with a 
shield-like process on the haemal side of the tentacular series. Rolypides 
connected to the chitinous rod by a flexible cord or funiculus. R, normani, 
sp. n., Allman, 1. c. p. 68, pi. 8. Creeping over the surface of dead shells 
from a depth of ninety fathoms in the Shetland seas. 
In following the development of this new form, the author was struck by 
the resemblance of the valve-like fleshy plates to the mantle of the Lamelli- 
branchiata, whose lobes lie, as here, to the right and left of the body, instead 
of dorsally and ventrally, as in the Brachiopoda ; and perhaps thus there is a 
new light shed on the affinities of the Polyzoa, whose relations will be then 
closer to the Lamellibranchiata than to the Brachiopoda, the most important 
difference between the two former classes being the neural flexure of the 
intestine in the Polyzoa, and the haemal flexure in the Lamellibranchiata. 
These relations are illustrated by diagrammatic figures. 
