46 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Human Parasites in Manila.* — B. C. Crowell and R. W. Hamniack 

 report on the intestinal parasites observed in 500 consecutive autopsies 

 on people of all ages in Manila. They found Ascaris lumbricoides in 

 41*2 p.c, Trichiuris trichiura in 34 "4:; hookworm in 16*6, Tsenia 

 saginata and Gysticercus cellulosse in - 2, Oxyuris in 1, Glonorchis 

 sinensis in - 4, Schistosomum japonicum in 0*2, malaria in 5, and 

 amoebic colitis in 5 p.c. 



Platyhelmixithes. 



Peculiar New Trematode.f — Gr. A. MacCallum describes Thoraco- 

 cotyle croceus g. et sp. n., found clinging to the gills of the Spanish 

 mackerel (Scomberomorus maculatus) in the New York markets. The 

 name refers to the peculiar barrel-like or thorax-like arrangement of 

 the chitinous ribs forming the skeleton of the suckers. The body is 

 elongated (4*5 mm. by 0*75-0 "9 mm.), with bilaterally placed ventral 

 marginal clasping suckers extending along more than half the body- 

 length. The testicular mass is single, dorsal, with elongated seminal 

 vesicle and protrusible cirrus. The ovary is in a single coil ; the uterus 

 is elongated, opening anteriorly with the cirrus through an unarmed 

 genital pore. There seem to be only three or four relatively large 

 elliptical ova (0' 18 mm. by - 06 mm.) with a tapering filament at each 

 end about 27 mm. long. 



Loxogenes arcanum.^ — H. L. Osborn discusses some histological 

 peculiarities in this rare Trematode which has been found in frogs in 

 Minnesota and elsewhere. The mature worm was found within cysts in 

 the vicinity of the pylorus, which seems an extraordinary fact. A 

 description is given of alimentary, excretory, and reproductive systems. 

 A remarkable fact is that there are spines on the outer ends of the 

 genital passages and on the cavity of the ventral sucker. The sub- 

 cuticular cells are discussed at some length. 



New Trematodes in Marine Fishes.§ — G. A. MacCallum describes 

 AcanthocotyU bothi sp. n. from the gills of Bothus maculatus ; Distomum 

 trachinoti sp. n. from the intestine of Trachinotus carolinus ; D. carangis 

 sp. n. from the rectum of Caranx crysos, and Podocotyle morone from the 

 gills of Morone americana. In Podocotyle at about one-quarter of the 

 length from the caudal end there are given off six pedicelled suckers, 

 4 mm. in length by 0*15 mm. in width. Each pedicel is surmounted by 

 a sucker which is strengthened by a peculiar chicinous formation. At or 

 near the caudal end there are two small suckers, and there is an ordinary 

 oval sucker on each side of the mouth. 



Histological Studies on Turbellarians.|| — Paul Lang has studied 

 Planar ia poly chroa Schmidt in reference to the regenerating epithelium, 

 the accessory eyes, and the structure of the pharynx. In the regenera- 



* Philippine Journ. Sci., viii. (1913) Sect. B, pp. 157-74. 



t Centralbl. Bakt. Parasitenk., lxviii. (1913) pp. 335-7 (4 figs.). 



t Zool. Jahrb., xxxvi. (1913) pp. 271-92 (1 pi. and 2 figs.). 



§ Centralbl. Bakt. Parasitenk., lxx. (1913) pp. 407-16 (11 figs.). 



|| Arch. Mikr. Anat., lxxxii. (1913) 1** Abt., pp. 339-64 (1 pi. and 2 figs.). 



