704 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
may be applied to other of the “ sutures,” when they really exist. In fine, 
the resemblances which are regarded as homologies are really superficial. 
Abnormal Repetition of Parts in Animals.* — Mr. W. Bateson brings 
forward, for the present without any comment, several instances of the 
abnormal repetition of parts in animals. Those enumerated here are the 
cases of a crab ( Cancer pagurus ), in which the endopodite of the third 
maxilliped was represented by a chela ; of repetition of the pincers of 
chelae in Crabs ; of a beetle ( Chrysomela banksi ) with three complete 
tarsi on one leg ; and of an Antedon with abnormal repetition of the 
brachial structures. 
B. INVERTEBRATA. 
Zoology of Victoria.! — In Prof. M‘ Coy’s twentieth decade only 
two plates are devoted to Bryozoa ; there are figures of a fine Bombycid 
( Chelepteryx Collesi ), of Abacus Peronii , and of three starfishes which 
have not before been figured of the natural colour ; one, Asterina calcar , 
is the commonest of Victorian starfishes. 
Zoology of Fernando Noronha.* — Mr. H. N. Ridley, assisted by a 
number of specialists, has published a report of the zoological collec- 
tions made by him during his visit to Fernando Noronha ; previous 
to this expedition, no land or fluviatile species of Molluscs, of which eight 
are now known, had been obtained from the island ; three new Crustacea 
were collected. 
Cellulose-reaction in Arthropoda and Mollusca.§ — Dr. H. Ambronn 
reports that Schultze’s solution (chlor-zinc-iodide) gives a violet colour, 
which is very near to, if not identical with, the colour-reaction of 
vegetable cellulose, when applied to a body which seems to be nearly 
always associated with the true chitin of Arthropods. The genera 
examined consist of Eupagurus , Homarus , Scyllarus, and others ; in all 
these the inner layers of the carapace as well as the tendons give the 
reaction and exhibit a very strong pleochroism. The reaction may some- 
times be hastened by previous boiling in caustic potash. Various 
Copepods, Ostracods, Spiders, Orthoptera, and Hymenoptera gave similar 
results. Among other classes of animals they were only seen in 
Mollusca, and there not commonly. 
Moilusca. 
y. Gastropoda. 
Revision of British Mollusca.|| — The Rev. Canon A. M. Norman 
continues his revision of the British Mollusca, and now deals with the 
Pulmonata ; 107 species are enumerated, but the varieties are not given. 
Cyprsea testudinaria.^ — Dr. B. Haller devotes the second of his 
studies on the morphology of the Prosobranchiata to Cyprsea testudinaria. 
Although Bouvier was acquainted with the nervous system of the 
Cypraeidse he placed them with the Tsenioglossata, far from the Rhipido- 
* Proc. Zool. Soc. Lond., 1890, pp. 579-88. 
f Proc. Zool. Viet., Decade xx. (1890) pis. 191-200. 
X Journ. Linn. Soc., xx. (1890) pp. 473-570 (1 pi.). 
§ Mittheil. Zool. Stat. Neapel, ix. (1890) pp. 475-8. 
|| Ann. and Mag. Nat. Hist., vi. (1890) pp. 327-41. 
1 Morphol. Jahrb., xvi. (1890) pp. 259-99 (2 pis.). 
