OF NORTHUMBERLAND AND DURHAM. 195 
Pholas dactylus is included in Mr. Winch’s list of Lindisfarne 
shells, and also in Mr. Hoge’s “ Natural History of the Vicinity 
of Stockton,” on Mr. Winch’s authority. In both cases we think 
Pholas candida has been mistaken for this species. The Pholas 
parva of Donovan, mentioned in the latter work, is the young 
of P. crispata. 
120. XYLOPHAGA, Turton. 
1. X. porsatis, Zurt. 
Xylophaga dorsalis, Turt. Brit. Biv. 253, t. 2, f. 4, 5. 
From an old piece of oak, apparently part of a root, washed up 
at the mouth of the Tees.—Mr. W. Backhouse. Whitburn.— 
Rev. G. C. Abbes. 
121, TEREDO, Linneus. 
1. T. Norveetca, Spengler. 
Teredo navalis, Mont. Test. Brit. 527. 
This species is occasionally met with in the timbers of old 
ships, but is scarcely native. 
Cuass. TUNICATA, Lamarck.* 
Orper.—(Les Agcrpres Simpizs, Milne Hdwards. ) 
Famity. PeLonarapa#, Porbes. 
122, PELONAIA, Forbes and Goodsir. 
1. P. conrugata, Morb. and Goods. 
Pelonaia corrugata, orb. and Hanl. Brit. Moll.i., 43, t. B.,f. 4. 
From the fishing boats, Cullercoats, occasionally. —J. A. 
Famity. Ascrp1apa, Forbes.. 
123. CYNTHIA, Savigny. 
C. ruserosa, Macg. ? 
Body irregularly ovate or roundish, pale brown, attached to 
shells or other marine substances by a broad base: branchial 
aperture terminal, tubular, much produced and broadly conical 
* By J. Alder and A. Hancock. 
