XXiX 
PECTUNCULUS. MODIOLA. 
Radiata, 249, f. 104. 
Pilosus  (Glycimerts, 
Rhombea, 107. 
103). 
Deiat Vulgaris (Modaoolus, 
Nummarius, 104. 107) (7). 
Decussata (Faba, 248, 
NUCULA. Fe 
Nitida, 248, f. 31. Gibbsit, 107. 
Nucleus, 105, f. 74. Discors, 108. 
Tenuis, 105. Discrepans, 108. 
Rostrata, 105. Nigra, 249, f..5 (s). 
Minuta, 106. 
PR DALIALY 
RAR naw 
(r) This shell is not the M. Modiolus of Linne, which 
is really that called Tulipa by Lamarck. I state this 
from an examination of the typical specimens of that 
ereat naturalist. 
(s) M. Nigra (Gray in Supplement to Parry’s Voyage) 
appears to be the Discrepans of Montagu’s Supplement, 
agreeing very well with the figure. The author's re- 
ference to the larger Newfoundland specimens must be 
expunged, for although extremely resembling them, the 
British shell miay be easily distinguished by the propor- 
tionate shortness from. the beaks to the ventral edge, 
(which by age also becomes much incurved,) and its de- 
cidedly stronger radiating costelle, Frith of Forth. 
