46 



Psolus squamatus) as having been taken in the Gulf of St. Lawrence by 

 Bell, and on the coast of New En-land by Verrill, but expresses a doubt as 

 to its distinctness from L. Fabricii. 



Thyone scabra, Yerrill. 



1873. Amer. Journ. Sc. and Arts, Third Series, vol. v., p. 100. 

 " Bay of Fundy " (Verrill). 



Thyoxidium productum (Ayres). 



Orcula punctata, L. Agassiz (1851) ; no description. 

 Duasmodacti/la producta, Ayres (1852). 

 Thyonidium productum., Stimpson (1853). 



Grand Manan. " This species is found in deep water, but occurs most 

 frequently under stones, or buried to a slight depth in gravel near low-water 

 mark " (Stimpson). 



Thyonidium pellucidum (Fleming). 



Holothuria pellucida, Fleming (1828). 

 Cncumaria hyalina, Forbes (1841). 

 Thyonidium hyalinuni, Lutken (1857). 



Murray Bay, Sir J. W. Dawson (Yerrill). 



Orcula Barthii, Troschel. 

 Labrador, Troschel. 



Family Afolpadiidoe. 



EuPYRGUs scaber, Lutken. 



Between Port Hood, C.B., and the east point of Prince Edward Island ; 

 also off Bonaventure Island, in 56 fathoms ; dredged by the writer in 1873 

 at the former locality, and in 1872 at the latter. Salmon Bay, near Caribou 

 Island, in 10 fathoms, sand, 1860 (Packard) ; and Long Island, Gateau Bay, 

 Labrador, in 15 fathoms, 1864 (Packard). 



Trochostoma turgidum (Verrill)." 



Molpadia turgida, Verrill (1879). 

 Trochostoma turgidum, Theel (1885). 



Bay of Fundy (Verrill and Smith, 1865) ; off Nova Scotia, 1877, U. S. 

 Fish Commission (Verrill); and Gulf of St. Lawrence, Whiteaves (Verrill). 



