360 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
preferentially. Gamasids found in Ants’ nests are very rarely to be 
found elsewhere ; they usually abandon the nest if the ant does so. 
The two kinds of animals live on friendly terms, and the ants even show 
signs of taking care of the Gamasids. The latter, on their part, do not 
appear to kill or injure the ants or their young, though they will eat 
dead ants. The Gamasinre are not improbably either scavengers or else 
messmates who share the feast off any insects which the ants may kill, 
but it is not known what the Uropodinse feed on or what is the object of 
their presence in the nest. 
Development of Lung-books in Scorpio fulvipes.* * * § — Mr. M. Laurie 
suggests that the lung-books of Arachnida were probably derived from 
a series of paired plate-like appendages, but united in the middle line 
by a gradual fusion of their edges with the abdominal wall of the body. 
The most simple condition is probably to be found in the Eurypterid 
Slimonia. 
New Sensory Organ in Galeodes.f — M. P. Gaubert finds at the ends 
of the palps and of the first pair of legs of Galeodes barbaims an organ 
which has not yet been described. About thirty chitinous tubes of the 
size of a hair, open at both ends, arise from the integument and 
penetrate into the interior of the tissue. The penetrating end is suc- 
ceeded by a sphere, the diameter of which is twice that of the tube ; it is 
hollow, and is followed by a short cylinder ending in a truncated cone. 
The whole is enveloped in a delicate hypodermic layer. The nerve 
which supplies this organ gives off fibres which have nucleated cells on 
their path. The author also describes the coxal scales which are placed 
on the second pair of legs, and appear to be tactile organs. 
Tegonotus— a new Phytoptid.J — Prof. A. Nalepa describes this 
new genus of Phytoptidre. The body is broadest behind the cephalo- 
thorax and narrows gradually posteriorly; the cephalothoracic shield is 
strongly developed, and often constricted near its posterior margin ; the 
dorsal set® are short and usually distant from the posterior margin of 
the shield ; the abdomen is covered dorsally with more or less broad 
half-rings, mostly smooth, often flattened ventral wards and finely striated 
and punctated ; the dorsal surface of the abdomen is roof-like, or 
traversed by two shallow longitudinal grooves, or only slightly arched ; 
the dorsal half-rings often extend over the pleura in tooth-like projec- 
tions (sub.-gen. Oxypleurites') or even in spines (T. heptacanthus) ; the 
limbs are weak ; the anal lobes are usually small. The new genus is 
placed near Phyllocoples Nal. The following species are described : — 
T. carinatus sp. n. ; T. ( Oxypleurites ) trouessarti sp. n. ; T. fastigiatus 
sp. n. ; T. ( Oxypleurites ) serratus sp. n. ; and T. ( Oxypleurites ) heptacan- 
thus Nal. 
Coxal Gland of Phalangium.§ — Herr J. Lebedinsky finds that the 
coxal gland of Phalangium opilio dcvelopes entirely from the mesoderm, 
and that the ectoderm shares only in forming the external aperture. 
* Zool. Anzeig., x?. (1892) pp. 102-5 (4 figs.), 
t Hull. Soc. Zool. de France, xvi. (1891) pp. 211-2. 
j Zool. Jnhrb., vi. (1892) pp. 327-37 (1 pi.). 
§ Zool. Anzeig., xv. (1892) pp. 131-7 (7 figs.). 
