168 CATALOGUE OF THE MOLLUSCA 
Orper. CIRRHOBRANCHIATA, Blainville. 
Famity. Dentatiapa, Gray. 
73. DENTALIUM, Linn. 
1. D. entauis, Linn. 
Dentalium entalis, Mont. Test. Brit. 494. 
From deep water, not common. 
Capt. Brown states that he met with a specimen of Denta- 
lium octangulatum at Holy Island.—Zdlust. Rec. Conch. 117. 
74. CAECUM, Fleming. 
1. C. tracuEa, Dont. 
Dentalium trachea, Mont. Test. Brit. 497, t. 14, f. 10. 
Rare. One specimen found in sand at Tynemouth.—J/. A. 
2. C. euaBrum, JJont. 
Dentalium glabrum, Mont. Test. Brit. 497. 
In sand from Cheswick and Fern Islands, rare.—J. A. 
Though aware of Mr. Clarke’s interesting unpublished re- 
searches on the animal of this genus, we are unwilling to re- 
move it from the vicinity of Dentaliwm, until its true place shall 
be more accurately made out. No genus has had more various 
places assigned to it ; and, having no personal knowledge of the 
subject, we do not wish to be the first to give it another. 
+* ACEPHALA. 
Cuass. CONCHIFERA, Lamarck. 
OrpeR. PALLIOBRANCHIATA, Blainville. 
Famity. TEREBRATULIDA, Gray. 
75. TEREBRATULA, Miiller. 
1. T. psrrtacea, Gmelin. 
Terebratula psittacea, Turt. Brit. Biv. 236. 
Hypothyris psittacea, King in Ann. Nat. Hist. xviii. 238. 
One perfect and a broken specimen of this species have been 
