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SUMMARY OF CURRENT RESEARCHES RELATING TO 
Siphonophora of Amboina.* — M. M. Bedot notes that most of the 
Siphonophora he found in the Bay of Amboina are common in the 
Mediterranean, and that the new forms are not of great zoological 
interest. These new species are Amphiroa dispar, Parasphenoides 
Amboinensis, and Enneagonoides Picteti. 
The author submits a much-needed critical revision of the family 
Agalmidae. He recognises the following : — 
Agalma Eschscholtz, with three species, Ag. Eschscholtzi Haeckel, 
Ag. Oikeni Eschscboltz, Ag. breve Huxley. 
Crystallomia Dana, with one species, Or. polygonata Dana. 
Stephanopsis g. n., with one species, St. Glausi Bedot. 
Halistemma Huxley, with one species, H. rubrum Huxley. 
Cupulita Quoy et Gaimard, with four species, C. picta Haeckel, C. cara 
Haeckel, C. Canariensis Haeckel, and G. amphitrites Bedot. 
Anthemodes Haeckel, with one species, A. ordinata, Haeckel. 
Agalmopsis Sars, with one species, Ag. Sarsi Kolliker. 
Lychnagalma Haeckel, with one species, L. utricularia Haeckel. 
We have given Bedot’s list in full, since he rejects a dozen genera 
and two dozen species. 
Nervous System of Rhizostoma.t — Herr R. Hesse has studied the 
nervous system and sense-organs of Bhizostoma Guvieri, and has also 
taken account of Gotylorhiza tuberculata ( Cassiopeia borbonica ) and 
Pelagia noctiluca. His most striking general result is that in the 
internal sensory groove of each marginal body numerous ganglion-cells 
lie in the nerve-plexus of the epithelium, and that others connected with 
these lie at the base of the stalk of the marginal body. These portions 
of the epithelium provided with ganglion-cells are the proper central 
organs of the nervous system. The peripheral nervous system extends 
over the sub-umbrellar surface, as a feltwork of nerve-fibres which are 
processes of bipolar ganglion-cells. The fibres show a distinct order- 
liness of arrangement, and are in relation with the inner sensory grooves 
and their nerve-centres. Herr Hesse seeks to explain the experiments 
of Eimer and Romanes in the light of his discoveries. 
Stauridium productum and Perigonimus repens.f — Dr. Cl. Hart- 
laub makes a welcome contribution to our knowledge of the structure 
and life-history of these two forms. The medusoids of Stauridium 
productum , which were reared in the aquarium, agree in most respects 
with those of the genus Sarsia (e. g. S. tubulosa , S. mirabilis), while the 
hydroid is closely related to the hydroid genus Gladonema. The 
umbrella is a truncated oval, 10 cm. high by 7 cm. broad ; the manu- 
brium, brownish in colour, is slightly contractile, and has one-third of 
its length hanging below the cavity of the bell ; the yellowish- white 
gonads begin at the base of the manubrium ; the young medusa has a 
wide stalk-canal ; the tentacles of the adult are 15 cm. long when 
extended, and end in a knob. 
Hartlaub has also succeeded in tracing the well-known Tiara pileata 
L. Ag. back to its origin from a species of Perigonimus (P. repens ?) 
which lives on the shell of Nucula nucleus. 
* Rev. Suisse Zool., iii. (1895) pp. 367-414 (1 pi.), 
t Zeitschr. f. wiss. Zool., lx. (1895) pp. 411-57 (3 pis. and 3 figs.), 
t Op. cit., lxi. (1895) pp. 142-62 (3 pis.). 
