10 
CATALOGUE OF 
** Shell ovate, radiately rihhed ; edge not plicated. Pei'foration 
of lower valve modei'ote, firmly embracing and inclosing the plug. 
American. Pododesmus. 
Pododesmus, Philippi, Wiegm. Arch. i. 387, 1837 ; Gray, P. Z. S. 
1849, 121. 
2. Placunanomia rcdis. 
White ; disk brown ; laminae smooth. 
Upper valve with two rounded, separate scars of nearly equal 
size, the hinder one rather more transverse. 
Placunanomia rudis, Broderip, Proc. Zool. Soc. 1834, 2; Gray, 
P. Z. S. 1849, 121. 
Pododesmus decipiens, Philippi, Wiegmann, Arch. i. 1837, 387, t. 
9, f. 1 (one scar left out). 
Hah. East Indies? Broderip. Mus. Cuming. Havana; Phi- 
lippi. 
3. Placunanomia foliata. 
White ; laminae smooth, with very slight, distant, radiated ribs ; 
disk purple brown. 
Upper valve with two nearly united scars ; the upper largest, and 
rather elongated; lower small, rounded. 
Placunanomia foliata, Broderip, Proc. Zool. Soc. \QM,2\ Gray, 
P. Z. S. 1849, 121. 
P. echinata, Broderip, Proc. Zool. Soc. 1834, 2. 
“P. pectinata, Brod.” in Mus. Cuming. 
a. Upper valve of young. St. Vincent. Jamaica. From the 
Rev. L. Guilding’s collection. 
h, c, d, e. Perfect. On Spondylus. West Indies. Mus. 
Broderip. 
The specimen of Placunanomia echinata, from the island of 
Nevis, in Mr. Cuming’s collection, appears to be only an imperfect 
specimen of this species. Mr. Broderip doubted if this might not 
be the case, when he described it. 
4. Placunanomia abnormalis. 
White, radiated, ribbed. Upper valve with two scars, confluent 
on the lower hinder edge; the upper one rather the largest. 
“ Placunomia abnormalis, Soiv.” in Brit. Mus. ; Gray, P. Z. S. 
1849, 121. 
a. West Indies. 
