306 SUMMARY OF CUREENT RESEARCHES RELATING TO 



5. Arachnida. 



Hydracarina of Epping Forest. — Charles D. Soar (Essex Natu- 

 ralist (published Oct. 1917), 18, 96-105, 23 figs.) gives a list of 

 fifty-two species, in twenty genera, from Epping Forest — about one-fifth 

 of the total number of species for the Britannic area. Eleven forms are 

 figured. J. A. T. 



Lebertia sefvei Walter. — W. Williamson and Charles D. Soar 

 {Journ. Quekett Micr. Club, 1918, 13, 1-4, 1 pi.) record the discovery of 

 this Arctic form in Dartmoor, bringing the number of British species of 

 Lebertia up to twelve. They give a description and figures of the 

 external features. J. A, T. 



New Pentastomid from a Fish. — P. de Beauchamp {Bull. Soc. 

 Zool. France, 1918, 43, 14-20, 3 figs.) describes Porocephalus nematoides 

 sp. n., from the food -canal of a species of Mastacembelus from Lake 

 Tanganyika. The only other species known from fishes is P. gracilis 

 (Diesing), and the two are nearly allied. Both are elongated and 

 cylindrical, very like Nematodes. J. A. T. 



e. Crustacea. 



New Parasitic Copepod. — Ch. J. Gravier {Comptes Rendus, 1918, 

 166, 502-5) describes Flabellicola neapolitana, g. et. sp. n., found 

 attached to the restricted area anterior and dorsal to the gills, and 

 between two fans of setas, on the first segment of the Polychaet 

 Flabelligera (Siphonosfoma) diplocliaitos. The body of the female shows 

 no appendages, nor segmentation, nor food-canal — little more indeed 

 than ova and granular reserve material. Some spermatozoa were found, 

 but no males were discovered. The remarkable parasite may be pro- 

 visionally referred to Hansen's family of Herpyllobiidge. J. A. T. 



Annulata. 



Peculiarly Adapted Annelid. — F. Mesnil and M. Caullery {Bidl. 

 Soc. Zool., France, 1918, 42, 127-32, 5 figs.) describe Exogone hebes 

 Webster and Benedict, var. hibernica Southern, a rare Syllid, requiring a 

 new sub-genus Parexogone. It lives in compact sand and has a some- 

 what Oligochset appearance. The head is prolonged into a sort of cone 

 with fused palps ; the anterior part of the food -canal is very muscular, 

 with proboscis, crop, and gizzard ; the cuticle is very thick. In short 

 the worm is remarkably adapted to peculiar conditions of hfe. 



J. A. T. 



Notes on Syllids. — F. Mesnil and M. Caullery {Bidl. Soc. Zool., 

 France, 1918, 43, 34-40, 2 figs.) discusses some interesting Syllids 

 from the Litliothamnion zone at the Hague. These include Myrianida 

 fasciculata, a new Autolytus, and various species of Exogone, Sphserosyllis, 

 and Grubea. Attention is directed to the occurrence of a sexual stolon 

 and schizogamy in Grubea limbata, and to the presence of a species of 

 Rhopalura inside Sphserosyllis erinaceus Clp. J. A. T. 



