n \\ \\n. i on MI, 



l"he \vith r>"r lilament- 

 tivmitie-, the riL r lit one much In i 

 \ i-h i \. A. All. Ahou 1 



.1 



Dl \l.\. A Adam-, ! 



Shell spirally striale, not 7ari000e, -ometime- ;i little DOdfll 



around the middle. colmnella nearly Mraiirht. n.t I rum-at- . lip 

 simple. ."> -p. 



IVii/ijifii '. 



1). v \i:i A. A. Ail. 



YUFKBLN \. A. Ail., i v 



Thi> Lrroup I have included in Knlimid.-e . Manual, viii. 

 hut Mr. Adams, in lMll>, ce^arded il a- a meinher of the Liti..i 

 in which opinion h(> has heen follo\ved hy Watson and other-. 1 

 introduce the uToiip airain. in order to include gome D( 

 Watson, which may possihly really heloni: in Litiopid;.-. 



? FAMILY 



C'hai-acters those of the following L r enu>. 

 (leiius (JIKATDIA, r>.>ii, 



Slu'll oval, spire conoid, traiNpaivnt. ])oli>hed, without epider 

 la-t whorl extendinir U|wards at the aperture half way upon 

 penultimate; aperture oval, Miperiorly angular, with a trace of a 

 sinus, columella short, roluist. i-nlar^iiiL: In-low. i>eri-t.>ni. 

 thick, lied; impei-foi'ate. OperCtdtUD unknown. (J. IM: 

 I>oiirir. Frt-sh water. Lake T< fica. 



\- neither animal nor operciilum are known, the only char 

 are those of tlie shell-which i.- unfi-mvd. lioiir^niL'nat il 

 to a--imilate the --roiij) with any previously-known family. 



Genus KKVMoNDIA. Bourg., 1> 



Shell o\ al-conoidal, more >r less elonga' i;-h chestnut 



color with a lighter sutural hand, smooth, polish 



mis; last whorl slightly a-ceiid iiu ;it 11,- :-. : rt ure. t hen thoitl J d0- 

 tlected at the in-ertioii ot the si roiiL r ly-t hickeiied - lip. 



which is without external rih, columella \\ith a lon^itudin 

 rid'jv ; no innhilicns. ( )perciilum unkn>w n. K. 1 1 -1:11. Smith. 



Lake Tanganyika. 



