106 Moll. 
MOLLUSCOIDA. 
Molgula. Larva tailed ; edges of the orifices simple ; branchial meri- 
dians complex, borne by the multiple ribs with complicated infundibula 
aud comparatively short and variable tremas. M. echinosiphonica, sp. n., 
found on and between Cynthia rustica; socialis (Alder), in holes of gneiss 
and mica-schist ; and ampulloides (Van Beneden, Kupffer). The two 
former observed at Roscoff, all three described and figured. Lacaze- 
Duthiers, 1. c. pp. 668-603, pis. xix.-xxii. 
Ctenicella^ g. n. Edge of both orifices laciniate ; in other respects like 
Molgula. C. lanceplaini, sp. n., Roscoff, on stones and floating weed ; 
margatce, sp. n., Margate, in holes at low ebb ; appendiculata (Heller, 
Molg.), Cette and Adriatic. Lacaze-Duthiers, 1. c. pp. 604-646, pis. xxiii.- 
xxvi. [Name too near Ctenocella^ Milne-Edwards, 1855, Gorgoniidoi.'] 
Eugyra (Aid. & Hanc.). Larva tailed ; branchial meridians simple, 
scarcely borne by a single rib ; infundibulum simple j tremas long and cir- 
cular. E. arenosa (Hanc.) = tuhulosa (Forb. & Hank, as Molgula'), Roscoff. 
Lacaze-Duthiers, 1. c. pp. 647-659, pi. xxvii. 
POLYZOA. 
A sort of segmental organ, described as a short tube, ciliated in- 
ternally, opening on one side into the matrix not far from its external 
aperture, aud on the other obliquely into the cavity of the body, has been 
observed in two species of Pedicellina and in Loxosoma. It appears 
very early in the bud. [Hatschek indicated it in 1877.] L. Joliet, 
C. R. Ixxxviii. p. 392 ; abstract in Ann. N. H. (5) iii. pp. 390 & 391, and 
J. R. Micr. Soc. ii. pp. 301 & 302. 
Abstract of Bauuois’s paper on the development of the Ohilostomatous 
Bryozoa [1877] in Ann. N. II. (5) iii. pp. 171-174. 
Abstract of RiiriACiioFE’s paper on the development of Tcndra and 
Lepralia [Zool. Rec. xv. Moll. p. 93] in J. R. Micr. Soc. ii. pp. 300 & 301. 
W. Repiaohoff gives some further observations on the first stages of 
development in Tetidra zostericola and Bowerhanhia, especially the forma- 
tion of the endo- and ectoderm, and the zone of cilia in the embryo ; 
Zool. Anz. ii. pp. 67-69 & 660-664. He also gives some notes on the 
larval forms known as Cyphonautes and the analogy of the organs called 
suctory disc and hood (Kappe) in the larvae of Bugula, Tendra, and 
Lepralia ; tom. cit. pp. 517 & 518. Abstract in J. R. Micr. Soc. ii. 
pp. 707 & 863. , 
Arctic Sea. 74 species on the shores of the Kola Peninsula collected 
by P. Trybom in 1877, enumerated by F. A. Smitt, GEfv. Ak. Forh. 
XXXV. pp. 19-32. 
Mediterranean. W. Waters makes some remarks on the literature of 
Mediterraneau Polyzoa, and describes 77 species of Chilo stomata, 33 of 
Cyclostomata, and 1 of Ctenostomata, observed at Naples ; Ann. N. H. (5) 
iii. pp. 28-43, pis. viii.-xi. pp. 114-126, pis. xii.-xv. pp. 192-202, 267-281, 
pis. xxiii. & xxiv. Many genera found near Naples, not deeper than 40 
fath., occur in other seas at greater depths (p. 280). Only the species 
that are figured will be mentioned infra. 
