GiG 
ZOOLOGICAL LITERATURE. 
insertion of tlie following joint, rounded at its 'inner edge. Anterior feet 
well developed, equal ; ainbiilatoiy feet remarkably long, those of the second 
pair longest. Abdomen of the male with seven segments. One species, 
J). lonyipes, sp. n., New Caledonia, A. Milne-Ed wards, Ann. Soc. Entomol. 
de France, vii. p. 28-1. 
riagusia squamosa (Ilerbst), at Madeira. According to other authors, it 
lives also in the Indian Ocean j but perhaps it has been mistaken for IH. orien- 
talis (M.-E.). Martens, Preuss. Exped. Zool. i. pp. 14 & 23. 
MACRURA. 
FaUnurus vulgaris produces a craclding sound by rubbing the base of the 
larger antennae against the fixed ring piece to which the first moveable joint 
of these antennae is articulated. On the upper and inner surface of that 
moveable joint there is a hollow covered with a membrane which is partly 
beset with hairs, partly without them, and provided with parallel furrows. 
On the sm’face of the ring piece, against which this membrane is rubbed, 
faint scratches may be seen, which, without doubt, are caused by those 
hmrs. The sound is only produced when the rubbing is done in a direction 
contrary to the hairs. The elasticity of the hairs yielding to the pressure 
for minute intervals of time produces the intermittent movements which are 
the real cause of the sound. Mbbius, Arch. f. Naturgeschichte, xxxiii. 
pp. 73-76, pi. 2. figs. 1, 2. 
Astacus Jluviatilis (auct.) in some streams of the south-eastern part of 
Norway, probably introduced from Sweden. G. 0. Sars, Crust, d’eau douce 
de'Norv^ge, p. 11. 
SCHIZOPODA. 
The analogies of this division (called legion by the author) with some 
genera of normal Macrura, as Feneus, Fasiphae, and with earlier stages of 
development in other genera, are pointed out by G. O. Sars ; he thinks they 
oughli^to be regarded as Decapods which remain on a lower stage of deve- 
lopment than the rest of the order. Sars, /. c. pp. 11, 12. 
AIgsm oculata (Fabr.), var. relicta (Lov<Sn). Its external forms, as well as 
its anatpmy, are described and figured by G. 0. Sars, I, c. pp. 14-41, pis. 1-3. 
The hekrt is in the same situation as in Decapods generall}^ but is very 
elongate ; only the large arteries are real vessels, their branches being merely 
intersj:itial currents in tlie mass of other organs. Instead of distinct gills, 
there are, under the cephalothorax at the bases of the feet, six peculiar 
organs, forming llcxuous cylindrical tumours of the sides of the body, con- 
taining blood, and communicating with the lateral slits of the heart; they 
are homologous with the branchial vessels of Decapods, but are here pecu- 
liarly developed, so as to perform the function of gills. The cerebral ganglia 
are more numerous than in other Decapods ; the eyes are more developed 
than in most of the higher Decapods. The division of the nervus opticus into 
three segments within the eye-stalk and its final termination are described in 
detail, also the auditory organ in the internal lateral lamina of the caudal fan. 
Several bristles on the stalks of the upper antennee, on the abdominal feet, 
and on the caudal lamina are thought by the author to perform also an 
auditory function, but more simple and more imperfect ; the first of them are 
the same as the auditory cilia observed by Spence Bate in the Amphipods, 
