40 Mr. H. A. Baylis on a new 



and a few yellow hairs on the posterior border of the fourth 

 segment in the centre, and the fifth and s,ixth segments with 

 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 Zschokkeella. 

 By H. A. Baylis, B.A. 



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

 [Plate VI.] 



Among a collection of parasitic worms resently presented to 

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

 Coast, there occurred several well-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 [Mas] 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 believing 

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

 was hitherto known to occur in rodents. 



Zschokkeella muricola, sp. n. 

 External Features. 



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

 typical Cestode shape, being much flattened dorso-ventrally. 

 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 gradually. The 

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

 middle of the strobila. 



