TREGELLES : MARINE MOLLUSCA OF CORNWALL. 221 
Thecacera pennigera Mont.—Off Rame Head, in 20 
fathoms (W.G.); Falmouth (W.P.C., R.V.) ; Cornwall 
(R. Q. Couch). 
T. virescens A. & H.—Two specimens found at Bar Point, 
Falmouth, in 1849 (W.P.C.). 
T. capitata A. & H.—Dredged off St. Ives in 25 fathoms, 
1853, (Barlee). 
Polycera quadrilineata Miill.— Coasts of Devonshire and 
Cornwall, frequent” (A. & H.); Plymouth (W.G.) ; 
Gerrans (Vigurs); Falmouth (W.P.C., R.V.); Mount’s 
Bay (G.F.T.). 
P. (Palio) Lessonii var. ocellata A. & H.—Plymouth 
(W.G.) ; Falmouth (W.P.C.). 
Triopa clavigera Miuill—Fowey and Helford (Alder) ; 
Falmouth (R.V.). 
Aegirus punctilucens D’Orb.—Plymouth (W.G.); Prid- 
mouth, near Fowey (Peach). 
Tritonia Hombergi Cuv.— Common on the trawling 
grounds, 40 N. of Longships (W.G.). 
T. (Candiella) plebeia Johnst—Taken somewhat frequently 
at Plymouth (W.G.). 
Scyllz~sa pelagica L.—Three specimens at Falmouth, on 
Laminaria bulbosa, in 1847 (W.P.C.). 
Dendronotus frondosus Ascan. [D. ardorescens Miill].— 
Plymouth, two specimens, dredged in 23 and 25 fathoms 
_(W.G.) ; Falmouth (R.V.). 
Doto fragilis Forbes.— Plymouth, commonly found on 
Antennularia, and other Hydroids (W.G.) ; Fowey (Alder); 
Falmouth (R.V.). 
D. pennatifida Mont.—Dredged by Dr. Benham off Pickle- 
combe Fort, Piymeuth (W.G.). 
D. coronata Gmel.— Plymouth, common on Plumularia 
(W.G.); off Eddystone (J.M.B.A.); Falmouth (W.P.C., 
R.V.). 
