253 



Hetairus debilis, Spence Bate. 



1888. H.M.S. Challenger Reports, Zoology, vol. xxiv., p. 615. 



With the preceding. This species " appears to me to form a link in a 

 series by which extreme forms are united, or it may be only a younger form 

 of Hetairus tenuis " (Bate). 



Family Crangonidce. 



Crangon vulgaris, J. C. Fabricius. 



Throughout the entire region, at or near low-water mark to a depth of 

 about 50 fathoms. The most northerly locality at which this, the common 

 edible shrimp of the norch Atlantic, has been collected on the coast of 

 eastern North America, is Caribou Island, where Packard says it is large 

 and abundant on the mud flats. The most southerly locality at which it 

 has been taken on the same coast, is at Fort Macon, North Carolina. So 

 far as the writer is aware, this species is not used for food in eastern Canada, 

 as it is so largely in the British Islands and northern Europe, nor is it yet 

 known whether it could be caught in the Maritime Provinces or Gulf of St. 

 Lawrence in suiEciently large numbers to be of any economic value. 



Sclerocrangon BOREAS (Phipps). 



A more northerly species than the preceding. It is known to range from 

 Massachusetts Bay, off Salem, to the Arctic Ocean as far north as lat. Sl° 

 44', and, in depth, from low-water mark to 33 fathoms. In the waters of 

 eastern Canada, it has been taken at the following localities. Grand Manan, 

 '' dredged in 4 fathoms, on a nuUipore bottom, near the Passage, and in 20 

 fathoms, siielly, off Duck Island ledge " (Stimpson). " Bay of Fundy, 

 occasionally taken among rocks at low water ; common in 5 to 25 fathoms, 

 rocky, gravelly, and shelly bottoms ; and abundant at special localities in 

 Johnson's and South Bays, in 10 to 15 fathoms, on rocky bottoms overgrown 

 with sponges, ascidians, hydroids, algaj, etc.; 1864, 1868, 1870, 1872, 1876. 

 Halifax, Nova Scotia, 1877; 18 fathoms fine sand ; 20 fathoms shingly ; 

 and 25 fathoms gravelly " (S. I. Smith, 1879; op. cit., pp. 56 and 57). Gulf 

 of St. Lawrence, on the Orphan Bank ; and off Cape Bon Ami, P.Q., in 30 

 fathoms ; dredged by the writer in 1873. Caribou Island, 8 fathoms ; Square 

 Island, 30 fathoms ; Henley Harbour, 10 fathoms ; and whole coast of 

 Labrador (Packard). L'Anse au Loup, 3 to 8 fathoms ; Henley Harbour ; 

 and Dead Island near Square Island (Labrador) in 1 to 3 fathoms ; 

 Stearns expedition (S. I. Smith). Port Burwell, Cape Chudleigh, Hudson 

 Strait, Bell, 1884 (S. I. Smith). 



