42 SUMMARY OF CURRENT RESEARCHES RELATING TO 



its characters ally it closely with the Eurasian species of Rhynchelmis, 

 while others link it to Sutroa and EcUindrilns. A modification of the 

 definition of the genu^ is proposed. J. A. T. 



New North American Species of Haplotaxis. — Frank Smith 

 {BuU. Nat. Hist. Survey, Illinois, 1918, 13, 43-8, 1 pL). A description 

 is given of Haplotaxis J orhesi sp. n., from the Illinois River, and of the 

 reproductive system of H. emissarius. J. A. T. 



North American Representative of Trichodrilus. — James E. 

 Kindred {Bull. Nat. Hist. Survey, Illinois, 1913, 13, 49-52). A small 

 Lumbriculid, probably Trichodrilus allohrogum Claparede, was pumped 

 up from a well in Concord, Illinois, It is the first representative of 

 Lumbriculida3 as yet recorded from North America. Diagnoses of the 

 three European species of Trichodrilus are given. J. A. T. 



Bryozoa. 



Fossil Bryozoa of Panama Canal Zone. — F. Canu and Ray S. 

 Bassler {Bull. U. S. Nat. Mus., 1918, 103, 117-22, 1 pi.). Descrip- 

 tions are given of the few Bryozoa that have been found as yet in the 

 rocks of the Panama Canal zone and related areas. The list includes 

 Ogivalina inutaiilis sp. n., Stichojmrina tuberosa sp. n., two species of 

 €upularia, and Holoporella alhirostris (Smitt). J. A. T. 



Nematohelminthes. 



Nematode Parasite of Chicken. — L. D. Wharton [Philippine 

 Journ. Sci., 1918, 13, 219-21). In the proventriculus of a chicken in 

 the Philippines a number of Nematodes were found, belonging to the 

 species Tetromeres fissispina. As in other species of this genus there is 

 marked sex dimorphism, the males being long, slender white worms, and 

 the females sub-globular and red. The female worms lie embedded in 

 the glands ; the males are free or with one end in a duct. They are 

 much smaller than the females, and seem to be much less numerous. 

 They probably die after pairing. The same Nematode has been found 

 in the duck (Anas boschas) and the coot {Fulica atra). J. A. T. 



Life-history of Ascaris lumbricoides. — B. H. Ransom and W. D. 

 Foster {Proc. Amer. Soc. Zool. in Anat. Record, 1919, 15, 341-2). The 

 results reached by Stewart have been confirmed and supplemented. The 

 swallowed eggs hatch in the intestine ; the larvae reach the portal vein ; 

 they pass by the circulation to the lungs, where they undergo consider- 

 -able development. By the trachea and the oesophagus they reach the 

 intestine, developing slowly to maturity if the host be suitable, passing 

 out and dying if the host be unsuitable (rat, mouse, guinea-pig, rabbit). 

 Lung-troubles may be caused in children ; fatal pneumonia in pigs. In 

 lambs and young goats the Ascaris of the pig can develop much further 

 than in rats and mice, and may approach maturity. Eggs injected sub- 

 cutaneously will hatch, and the larvifi may reach the lungs. J. A. T. 



