40 Mr. H." A. Cavlis on a rieio 



and a few yelloTr hairs on tbe posterior border of the fourth 

 segment in the centre, and the fifth and sixth segments Avith 

 their posterior borders wholly yellow-haired ; genital organs 

 small but distinct. The tarsi, more especially the anterior 

 pair, with their bases very pale, almost white, then becoming 

 black; this applies only to the last four joints; the first 

 joint is yellow and as long as the four joints together. 



IV. — A new Cestode of the Genus Zscliokkeella. 

 By H. A. Baylis, B.A. 



(Publislied by permission of the Trustees of the British Museum.) 



[Plate VI.] 



Among a collection of parasitic worms resently presented to 

 the Britisii Museum by Mr. C. M. G. Hoyte, from the Gold 

 Coast, there occurred several w'ell-preserved specimens of a 

 Cestode^ stated to have been taken from the intestines of 

 a rat. The precise determination of the host was, unfortu- 

 nately, not given, but in all probability it was the black rat, 

 Epimys \Mus\ rattus, which, as I am informed by Mr. Old- 

 field Thomas, would be the prevailing species in that locality. 

 "When held up to the light and examined with the naked 

 eye, or with a lens, the hinder segments of the worms 

 appeared to be full of small rounded bodies, which were 

 evidently '' egg-capsules.'^ These gave the worms a peculiar 

 '^ speckled '^ appearance, and seemed at once to indicate that 

 this was not one of the species of tapeworms commonly 

 occurring in rats. Further investigation showed that it was 

 probably a new species, and I shall give reasons for believii>g 

 that it belongs to a genus of which only one other species 

 was hitherto known to occur in rodents. 



ZscJwhkeella muricola, sp. n. 

 ExTEENAL Features. 



The specimens measure 9-12 cm. in length_, and are of 

 typical Oestode shape, being much flattened dorso-veiitrall3\ 

 The body is narrowed rather suddenly in front, forming a 

 slender neck, but there is a rounded knob-like head. Poste- 

 riorly the body is also narrowed, but more graduallj'. The 

 greatest width (about 3*5 mm.) occurs rather behind the 

 middle of tiie strobila. 



