172 SYSTEMATIC ARRANGEMENT 



Inner side of the mantle edge quite distinct from the gills of other 

 Patellce, with a series of transverse waved membranous laminae, con- 

 tinued round the edge over the head. Foot simple. 



Fam. XII. GADINIAD.E. 



Gill single, placed obliquely across the back of the neck. Tenta- 

 cula expanded, forming a funnel-shaped expansion. Eyes sessile. 

 Shell conical ; muscular impression horseshoe- shaped, marginal, 

 with a groove (for the vent) in the front of the right side of the 

 scar. Teeth ? 



1. Gadinia. 



1. G. Garnoti, Wiegmann, Arch. 1839, t. 3. f. 3 ; Adams, Gen. Moll. 

 t. . f. 4. 



Fam. XIII. LEPETHLE. 



Tooth : central single, with two hook-like teeth on each side. 

 Gills none ? or two pinnate on the back of the neck ? 



1. Lepeta. 



Eyes none. 



1. L. caeca, Miiller, t. . Propilidium ancyloide, Forbes, t. 268. 

 f. 4 (t. a. a. f. 4). 



Fig. 92.— Teeth of 



The teeth of Lepeta cceca are square, subqua- epe a c * ca ' 

 drate, anteriorly rounded and winged ; central /^^\_X 

 tooth at the base widely cordate, cutting edge r$5ij®|jS 

 three-lobed, middle lobe longer, subspatulate, side / vm f. 

 lobes shorter, kidney- shaped ; lateral teeth two 1 M \/ 

 on each side, laminaceous, shortly hooked, the \ j\ j 

 inner one winged on the outside and produced \j ^~~~ i 

 behind into a style (fig. 92). ^ **' 



The edge of the foot of Lepeta Franklini is quite simple, without 

 any fringe. Mantle edge simple, with a small thickened ridge on 



the under side near the margin. Gills ? Tentacles far apart, 



setaceous. Eyes none in specimen in spirits. 



2. IOTHIA. 



Gill none round the foot. 

 1. Iothia fulva. Patella fulva, Miiller, t. 70. f. 5. Pilidium fulvum, 

 Forbes, t. 268. f. 3 (t. a. a. f. 3). 



The teeth of Iothia fulva are square, elongate, in front angularly 

 winged on each side ; central tooth elongated at the base, cutting 



