118 



prolonged in trout. Ocular peduncle- loiur. tentacles not visible. 

 I'. < 'i! \I;I."\MI 1:1. IVlit (PL 19, fig. 5.). VMM Martens suspects 

 tliat the einU of the tentacles are bent lack when the animal i> at 

 rest so as to become invisible : at lea>t this is the case in Pot amides 

 \ tfurgctckichU, li, 48). 



Siil.-vnu- LAMPANIA, Gray. 1> I'i. 



Turriculated, a little curved, whorls without varices ; aperture 

 Mibtnmcate at the base, with a >canvly distinct, straight canal; 

 lip >inuu>. T. /"\ \i.i:. Lam. Cluim. 



Batil/'iri'i. Cantor, 1*42, is the same, and has priority ; but 

 /../////////'/ i- well established, and need not be changed. 



11 LAMPAKELL \. M-rch. 1876. 

 Shell small, decussated. P. MINIMI'S, Gmel. 



Submenus ESCOFFIERIA, Fontamies, 1880. 



Turriculated. narrow, whorls numerous, subsolute ; aperture sub- 

 cin-ular, with sharp lij. columella excavated, canal obsolete. P. 

 Fi-< in;i:i, I-'oiitannes. Upper Tertiary of the Rhone basin. 



m> SANDBERGERIA, Bosquet, 1860. 



Shell small, ornamented like Jiitfinm. with a rmlimentary broad, 

 ."hallow, short canal, lip curved, prominent at the base, columellar 

 extremity >urrounded by a basal tasciole. Operculum said to be 

 < oiK( utric and calcareous, but there is some doubt about this: if it 

 is so, the group is certainly out of place in (Vrithiida.-. S. ANTE- 

 IT8, Stol. Tertiary. 



Genus DIASTOMA, Desh., 1848. 



Turriculated, with numerous ribs and a tew varices; inner mar- 

 pin ot'the aperture partially detached from the previous whorl, the 

 ;nre i- >troiiL r ly contracted posti-riorly, sinuous and subaiiL r ular, 

 but not channeled at the ba>e. channeled behind, columella COn- 

 cave, -imple. 



I'. VMM* II ."MM. I)(-h. St.'iirf. ,iii,l Slf.t. t'niirh., t. 72, f. 50), 



Eoc. 



TGt-im- MIX >STuM.\, Desh., 1861. 



jated. turn-ted: aperture nearly circular, dilated, 

 obli.jiie. terminatin- in front by a scmicanalicnlated angle; 

 :n Ha -liiditly concave, lip ,-imple. slightly expanded. 

 M. I >esh. Kocene, I'ari- ba>in. 



