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SUMMARY OF CURRENT RESEARCHES RELATING TO 
Mediterranean, but Dohrn multiplied the number of species unduly. 
Some of the specimens of Nymphon bore Bryozoa, e.g. Membranipora 
pilosa ; others showed Diatoms, Vorticellids, Gothurnia , and Ephelota . 
J. A. T. 
e. Crustacea. 
Observations on a Land Crab. — L. E. Cheesman ( Proc . Zool. 
Soc ., 1922, 361-3). Study of Gar disoma armatum from the river 
Gambia, but observed under the artificial conditions of the Caird House 
for Insects at the Zoological Gardens, London. The eyes only partially 
fill the large sockets. They function ineffectively in daylight, when 
the crab seems to rely on the abundant sensitive setae. In the twilight 
the crab can focus with tolerable accuracy. The third maxillipedes, 
lined at the apex with very soft hairs, are used to clean the eyes and 
shade them. No response to sound was observed ; the sense of taste 
and smell must be inside the mouth ; tactile setae are scattered over the 
limbs. The food consists chiefly of dead leaves and twigs, but fresh 
fish and mice are eaten. The whole mouse is gradually drawn into the 
mouth. Fresh water for immersion was preferred to salt water. 
J. A. T. 
New Decapod Crustacean. — Arata Terao ( Annot . Zool. Japon ., 
1922, 10 , 109-13, 1 fig.). Description of Sympasiphsea imperialis 
sp. n. found on the shore at Numadzu by the Crown Prince of Japan. 
Two other species have since been found. Of a brilliant scarlet colour, 
the new species is near 8. annectens Alcock, but differs in definite details, 
such as the teeth on the carina. J. A. T. 
Sex Dimorphism in Stomatopod. — Taku Komai {Annot. Zool. 
Japon., 1922, 10 , 101-7, 2 figs.). In the “flower mantis-shrimp,” 
Odontodactylus japonicus, there is marked coloured dimorphism, such as 
Darwin referred to in his Descent of Man in the case of Squilla stylifera. 
In the male the dorsal surface is bright salmon-red ; in the female the 
posterior half is bluish green. An interesting male specimen was found 
with the coloration intermediate between the typical coloration of 
male and female. This was probably to be associated with a defective 
development of hepatic organ and testes on one side of the body. 
J. A. T. 
Intersexes in Gammarus. — E. W. Sexton and J ulian S. Huxley 
{Journ. Mar. Biol. Association , 1921, 12 , 506-56, 9 pis., 6 figs.). In 
stocks of Gammarus chevreuxi there were found thirty-two female inter- 
sexes. These usually resemble normal females in reaching maturity, 
but they gradually come to resemble males more and more closely. 
Finally, in size, general appearance, and mode of swimming they 
resemble males, while the structural characters (brood-plates, gnathopods, 
and sensory hairs) are intermediate between male and female, but to a 
varying extent. Characters which are never present in normal males, 
such as brood -plates, are present, together with others never present in 
normal females, such as gnathopod-size and shape, sensory spines, 
excessive hairiness of antennas, etc., and, in extreme cases, curvature of 
the sensory hairs. One specimen produced fertile eggs ; another mated 
