E. PENARD ON SOME RHIZOPODS FROM SIERRA LEONE. 301 



The line of junction of the test-body with the neck, which 

 normally figures as a dark curved line (see Cash, Brit. Freshvj. 

 Rhiz., vol. ii. p. 63), was here of a very peculiar design, a 

 deep notch, with angular corners, such as shown in Fig. 3a. In 

 Fig. 36 this characteristic is seen from the side, but drawn from 

 a much smaller specimen. 



This species, indeed, was represented in the collection by two 

 forms the large one which has been considered here, and a 

 smaller one, about 150 /x in length (Fig. 36), and it was on the 

 smaller tests that the peculiar marking was mostly sharply 

 exhibited. 



Lesquereusia spiralis (Ehrenb.) Biitschli (PI. 9, Fig. ^). 



This species was represented by two very distinct vaiieties, 

 both of which are always of very rare occurrence ; the second 

 (Fig, 46), indeed, though reminding one of some of Leidy's figures 

 (Freshw. Rhizo]). of North America, pi. xix, figs. 9, 10 and 

 others), hardly seems to have been described yet. 



In the first of these varieties (Fig. 4), the test, thin and 

 transparent, 95 to 100 /x in length, covered with small and 

 relatively short vermiform rods, which were disposed with 

 some regularity in parallel rows, was ovoid in outline, slightly 

 compressed, and provided with a short neck, affixed to the body 

 of the shell and running along it nearly its entire length, hardly 

 showing, in fact, anything like the typical form of a tube. 



The second variety (Fig. 46), larger (135 to 140 /x), and with a 

 netw^ork of very long, thin, narrow rods, Avas quite different in 

 appearance, with a nearly globose body, from the anterior part 

 of w^hich arose, in a tangential direction, a straight, very broad, 

 tubular neck, opening in a large orifice, somewhat elliptical in its 

 contour. 



Difflugia pyriformis Perty (PI. 10, Fig. 5). 



In the group comprising the numerous Rhizopods w4iich, 

 though very likely representing genuine species, have a pyriform 

 appearance, and very generally described as Difflugia pyriformis 

 Perty {D. oblo7iga Ehrenb. in Cash, vol. ii. p. 5), I must include, 

 in the absence of any further information about the living body, 

 a small Rhizopod whose tests, all quite identical, were found in 

 the material. 



