4.S8 



]\Ir. M. Connolly on 



Genus Marconi a, Bourguignat, 1889. 



Marconia latulu (Mts.), 1895. 



Fiijs. 49 & 50 on PI. XIV. illustrate two paratypes in tlie 

 British Museum, from Butunibi and Miocre respectively ; 

 fig. 58 is that of a shell collected by Kemp near Lake 

 Mutanda, which Preston, ])erhaps rightly, considered a 

 distinct species and intended to name in accordance with 

 its egg-like form. In view, however, of the great variation in 

 length and relative breadth which occurs in species of this 

 genus, I hesitate to regard it as other than an obese, rather 

 senile example of M. luiula. 



Marconia murgariia (Preston), 1913. 



A small series collected by A. O. Fisher near Fort Portal 

 appear inseparable, on conchological grounds, from this 

 s[)ecies, of which a paratype is illustrated in fig. 51. They 

 vary in size from 18"3 X 7"5 to 158 x 95 nun., the two 

 largest being de[)icted in figs. 59 & 60. 



Marconia manjarita (Preston). Half of one row of radula, x 53. 



It will be seen that there is practically no difference in 

 asj)ect between the shells of M. latula and M. inargarita, 

 and I would have united them without hesitation, Avere it 

 not for the fact that the radula extracted by Colonel Peile 

 from more than one of the Fort Portal series differs so con- 

 siderably from that of latula, as described by Thiele, that, if 

 the shells are rightly identified and tlie raduke normal, they 

 cannot possibly be conspecific. 



The animals from Fort Portal were yellowish green, and 

 imparted their hue to the water in which the shells were 

 soaked previous to their extraction. The radula, of which 

 Colonel Peile has kindly furnished the subjoined drawing 

 (see text-fig.), has a small median tooth ; the admedians are 



