ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
57 
three-quarters of an hour. Moisture has an adverse influence on the 
vitality of the individual, excess of moisture inhibiting growth. The 
external characters which serve to differentiate the sexes are discussed 
in a note by Gf. H. F. Nuttall. The only essential difference is in the 
structures surrounding the genital orifice. J. A. T. 
“ Lyriform Organs ” of Spiders. — Hans Vogel ( Zool . Anzeig., 1921, 
53, 177-81, 3 figs.). A study of the “cleft organs” and “lyriform 
organs ” in Aranea sclopetaria. Each “ cleft organ ” shows a chitinous, 
a hypodermal, and a nervous portion. The latter consists of sensory 
cells, each of which is proximally connected with the nervous system 
and continued distally in a terminal process to a minute cleft in the 
integument. They occur singly and in “ lyriform ” groups. In the spider 
in question there are about 4,000 “ clefts ” and 132 “lyriform” groups. 
The latter occur only at the joints of the appendages. The single clefts 
occur on the joints, or diffusely, or on the abdomen where muscles are 
inserted. As to the function of these structures there is no certainty. 
They probably function as touch organs and as receptors for differences 
in pressure at the joints. J. A. T. 
New Linguatulid from a Batrachian. — L. Gedoelst ( Records 
Indian Museum , 1921, 22, 25-6). Description of a small Linguatulid, 
Raillietiella indica sp. n., from the lung of a toad ( Bufo melanosticha). 
This is the first case of a Linguatulid in a Batrachian. J. A. T. 
e. Crustacea. 
Abnormal Antennae in Amphipods. — Chas. Chilton (Ann. Mag. 
Nat. Hist ., 1921, 8, 116-8, 2 figs.). In a specimen Orchestia chiliensis 
the second antennae showed two extra joints in the peduncle, five being 
the normal number. In a specimen of Hyale brevipes from Ohilka Lake 
there was on the penultimate joint of the peduncle of the second 
antenna a small appendage nearly as long as the joint from which it 
arises. It was only on one antenna, and may have been the result of 
some injury. J. A. T. 
Amphipods from Juan Fernandez. — Chas. Chilton (Nat. Hist. 
Juan Fernandez and Easter Island , 1921, 3, 81-92, 4 figs.). A small 
collection of five species and a new variety of one of them. There is a 
special interest in Orchestia chiliensis , which has long been known from 
Chile and from New Zealand. It is a seashore form in New Zealand, 
but in Juan Fernandez it occurs up to 500 m. above sea level, and in 
one case it shows characters which make its general appearance similar 
to that of the purely terrestrial species of Talorchestia. In other cases 
no modification appears to have taken place. J. A. T. 
Asellus aquaticus. — Chas. Chilton (Ann. Mag. Nat. Hist ., 1920, 
5, 200-3). The author calls attention to Kacovitza’s evidence that 
Asellus aquaticus includes another quite distinct species, A. meridianus. 
On examining his British specimens, Chilton found that both species 
were represented, and a statement is given of the more important 
-differences between the two. J. A. T. 
