47 



Trochostoma ooliticum (Pourtales). 



Chirodota oolitica, Pourtales (1852). 

 Trochostoma ooliticum, Theel (1885). 



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

 in red mud, Whiteaves, 1873 (Verrill). 



Caudina arenata, Stimpson. 



Milne Bank, Northumberland Strait, four or five specimens ; and Pointe 

 du Chene, Shediac Bay, N.B., at low water, one specimen, collected by the 

 writer in 1873. 



paractinopoda. 



Family Synaptidoe. 



Chirodota l.evis (O. Fabricius). 



Holothuria kevis, O. Fabricius (1780). 

 Simapta coriacca, L. Agassiz (1851). 

 TrochinuH pallidus, Ayres (1852). 

 Chirodota Icevis, Stimpson (1853). 



" This species is fully and well described by Otho Fabricius, and his 

 account of its habits applies precisely to those of our species, as I have often 

 observed at Grand Manan. It lives in the stony mud of the shores of 

 these islands, buried to a depth of a few inches, usually in a horizontal 

 position. It is found at low-water, but is most abundant at a depth of 4 

 or 5 fathoms " (Stimpson). " Craig's Ledges, Passamaquoddy Bay, about 

 four miles from St. Andrews, lowest tides, abundant" (Ganong, 1884). 

 Gulf of St. Lawrence, near Ellis Bay, Anticosti, under rocks at low water 

 (Verrill, 1861) ; and Salmon Bay, near Caribou Island, in 10 fathoms, sand, 

 1860 (Packard). Atlantic Coast of Labrador, at "Temple Bay, in 5 

 fathoms ; Fox Harbour, in 1 fathom ; Dead Island, near Square Island, in 

 2 to 4 fathoms ; " Stearns expedition, (Miss Bush). 



Myriotrochus Rinkii, Steenstrup. 



Myriotrochus Rinkii, Steenstrup (1852). 

 (?) Oligotrochus vitreus, M. Sars (1806). 

 Myriotrochus vitreus, Duncan and Sladen (1881). 



A few specimens of this arctic species were dredged by the writer, in 1873, 

 in the Gulf of St. Lawrence, in 50 fathoms, nine miles and a half south-east 

 of Grand Pabou (a little to the north of the Bale des Chaleurs), and at the 

 entrance to Gaspe Bay. Packard, who had previousl}' dredged it on the 



