ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 261 



so characteristic in the adult, there is no trace in the larva. There is 

 no mouth, no anus, no excretory organ, and there are no cilia. It may 

 be that the residual mesenchyme cells eventually form gonads and 

 parenchyma. 



Platyhelrninthes. 



New Trematode from the Dark Green Snake.* — Marie V. Lebour 

 describes Lechriorchis inermis sp. n. from the body-cavity of Zamenis 

 gemonensis. This appears to be the first time that a member of this 

 group, usually occurring in the air-passages, pharynx, and anterior 

 oesophagus, has been found in the body-cavity. Unlike other species of 

 Lechriorchis, it has a smooth cuticle, but in some specimens spines can 

 be seen below the surface. This may indicate a gradual disappearance 

 of spines in a situation where there is no danger of being swept away, 

 as is the case in open passages. 



Studies on Double Planarians.f — L. Bohmig has studied in par- 

 ticular a double form of Polycelis nigra var. brwinea. The duplication 

 began a short distance behind the mouth ; there was a double copulatory 

 apparatus and two genital pores. A pair of cocoons was deposited at 

 intervals. The condition of the nervous and alimentary systems is 

 carefully described. 



New Avian Cestode.J — F. E. Beddard describes the structure of 

 Eugonodseum ocdicnerni g. et sp. n. from a Thick-knee (QSdicnemus bis- 

 triatus). The rostellum is very muscular, long and retractile, without 

 hooks ; the suckers are unarmed ; the dorsal excretory tube is much 

 smaller than the ventral, lying more or less laterally to it ; the ventral 

 vessels are connected by transverse vessels in each proglottis. The 

 longitudinal muscles are disposed in two rows. The genital pores are 

 unilateral ; the genital ducts pass between the excretory tubes ; the 

 testes are chiefly behind the ovary, and not very numerous ; the ovary 

 is to the pore side, in front of the vitelline gland ; the genital atrium is 

 very deep, with radiating muscles ; the cirrus-sac is large and muscular, 

 lying in front of the vagina ; the sperm-duct has a coil ; the cirrus is 

 unarmed ; the receptaculum seminis is present, but not strongly marked ; 

 no uterus is present. The ova are embedded singly in parenchyma, 

 accompanied by other cells. Round each ovum a cavity is formed later, 

 which is lined by cells. 



Cestodes from Centrolophus pompilius.§ — G. Schumacher gives 

 an account of Amphicotyle heteropleura, Bothriocotyle solenosomum, and 

 Echinophallus wageneri, discussing cuticle, musculature, nervous system, 

 reproductive organs, and other structures in detail. 



* Proc. Zool. Soc, 1913, pp. 933-6 (1 pi.). 



f Zool. Jahrb.. xxxvi. (1913) pp. 307-36 (2 pis. and 5 figs.). 



X Proc. Zool. Soc, 1913, pp. 861-77 (9 figs.). 



§ Zool. Jahrb., xxxvi. (1914) pp. 149-98 (3 pis. and 9 figs.). 



