ZOOLOGY AND BOTANY. MICROSCOPY. ETC. 201 



the body-wall, the branchial apparatus (with its chordoid skeleton), the 

 nervous system, the bristles, the blood-vessels, and the thoracic glands 

 or anterior nephridia. Serpulid structure is illustrated mainly in re- 

 ference to Pomatoceros triqueter^ with special attention to the body- wall, 

 the peri-intestinal sinus, the thoracic glands, the branchial filaments, the 

 operculum and its development, and the nervous system. The paper is 

 rich in interesting observations ; we cannot do more than indicate its 

 general scope. J. A. T. 



Interesting Abnormality in a Serpulid. — Enrique Rioja {Boll. 

 Soc. Espan. Hist. Nat., 1*)19, 19, 445-9, 2 figs.). Description of a 

 specimen of Hydroldes norvegica Gunn. which showed two opercula. The 

 operculum is the result of a transformation of a branchial plume, and 

 the author maintains that the primitive Serpulids had a double operculum. 

 The present day forms show a suppression of one operculum or of both 

 of them, a suppression of the branchlets on the stalk, a diminution of 

 the number of thoracic segments, and an asymmetry associated with 

 spiral coiling. J. A. T. 



Nematohelminthes . 



Nematode Parasites of Zebra. — Charles L. Boulenger {Para- 

 sitology, 1920, 12, 98-107, 7 figs.). Seven species are dealt with — 

 Strongijliis vulgaris, Gylindropharynx Irevicauda, C. longicauda, Gylico- 

 stomum minutum, C. zelrae sp. n., C. montgomeryi sp. n., Triodontophorus 

 serratus, and Craterostomum tenuicauda g. et sp. n. The first, fourth 

 and seventh are also parasites of domestic equines. The new genus is 

 closely allied to Triodontophorus Looss, but differs in the absence of 

 teeth projecting into the mouth-capsule. The mouth is also relatively 

 smaller and the number of elements of the leaf-crowns considerably less 

 than in any known species of Triodontophorus. J. A. T. 



Trichocephalus in Liver of Rat. — L. Muratet {C. R. Soc. Biol., 

 1919, 82, 1383-4). Lesions on the liver of Mus demmanus were found 

 to be due to adult specimens of Trichocephalus, which occur coiled up in 

 the liver. There were also very abundant ova. Some adult specimens 

 of Trichocephalus were also found in the intestine. J. A. T. 



Platyhelminthes. 



New Species of Oochoristica from Lizards. — H. A. Baylis 

 {Parasitology, 1919, 11, 405-14, 1 pi.). Descriptions of O.zoniiri?>^. n., 

 from Zonurus tropidosternum, in Portuguese East Africa, and 0. agamse 

 sp. n. in Agama. These new forms are contrasted with 0. truncata from 

 Agama, and the genus Oochoristica with the genus Linstoivia. Both 

 genera seem to belong rather to the Dilepinidag than to the Anoplo- 

 cephalidae. J. A. T. 



New Species of Anchitrema. — L. Gedoelst {G.R. Soc. Biol, Idld, 

 82, 1250-2). Description of A. latum sp. n., from the posterior intes- 

 tine of Chamseleon dilepis, differing from the other species of the genus 

 {A. sanguineum) mainly in the proportions of the body. J. A. T. 



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