622 SUMMARY OF CURRENT RESEARCHES RELATING TO 



most of the surface is peat-covered and boggy. He records Obisvnn 

 maritimum Leach from between tide-marks, 0. muscorum Leach among 

 dead leaves, and Ghthonius tetrachslatus Leach among stones. 



Transmission of Amakebe by Brown Tick.* — A. Theiler finds that 

 the disease of calves in Uganda called Amakebe is identical with East 

 ( 'oust fever (due to Theileria parva), and that it is transmitted by the 

 brown tick, Rhipicephalus appendiculatus, which has been proved in 

 South Africa to be the principal transmitter of East Coast fever. 



Alleged Importance of Demodex in Spreading Leprosy.t — E. 

 Bertarelli and V. Paranhos bring forward a number of facts which are 

 not in favour of the view that Demodex is important in the dissemination 

 of the bacillus of leprosy. 



Structure and Habits of Macrobiotus macronyx.J — J. Henneke 

 has studied the male of this fresh-water Tardigrade. In spring the 

 males are as numerous as the females, but later on they disappear. 

 Perhaps there is an alternation of generations as in Rotifers. The male 

 bears peculiar hooks on the first rudimentary appendage, which are used 

 in the sexual union. A moult occurs in the female at that time and the 

 old husk hangs on posteriorly so that the cloaca opens into it. The 

 males bore into this envelope and empty the seminal material into it. 

 Within it the spermatozoa may be seen moving about, and some may 

 enter the cloaca. When ejaculation is completed the female lays e^gs, 

 it may be fifteen in five minutes, which accumulate in the old envelope. 

 The latter is usually carried about until the young hatch out, but some- 

 times the female gets free from it before that. 



The author goes on to describe the integument, the food canal, the 

 blood, and the gonads, devoting particular attention to the testis. 



Clare Island Water-bears.§ — James Murray reports on the Tardigrada 

 collected at Clare Island, for which he adopts Schultze's name Arctiscoida. 

 He deals with no fewer than thirty-three species, all new for Ireland, 

 indeed, no water-bears have been previously recorded from Ireland. 

 Eleven are new to Britain, and five new to science. Twenty-two species 

 are common to Scotland and Clare Island, sixteen are Arctic, three 

 Canadian species occur, and Echiniscoides sigismundi is the first marine 

 water-bear recorded for the British Isles. About half of the Clare 

 Island forms are cosmopolitan or widely distributed. The Britannic 

 list now stands at sixty-one species. 



Middle Cambrian Merostomata.|| — Charles D. Walcott establishes 

 a new sub-order of Eurypterids which he calls Limulava with Sidney ia 

 inexpectans g. et sp. n., as its type. Along with Sidneyia he describes 

 Amiella ornata g. et sp. n., the oldest Merostome now known (from the 

 upper Lower Cambrian). The sub-order Limulava differs from the 

 Eurypterida in having a large epistoma similar to that of Trilobites ; in 



* Proc. Royal Soc, Series B, lxxxiv. pp. 112-15. 



t Centralbl Bakt. Parasitenk., lvii. (1911) pp. 490-3. 



X Zeitschr. wiss. Zool., xcvii. (1911) pp. 721-52 (1 pi. and 20 figs.). 



§ Proc. Irish Acad., xxxi. (1911) Clare Island Survey, pt. 37, pp. 1-16 (3 pis.). 



j Smithsonian Misc. Coll., lvii. (1911) No. 2, pp. 17-40 (6 pis.). 



