I. '08. 126 



distributed; the records are, however, scanty and it is prob- 

 able that it is much scarcer m these districts than in the Irish 

 Sea. Among the preserved material from these coasts the 

 greatest possible variation exists, but the forms which show 

 the widest differences from those taken in the Irish Sea were 

 nearly all found in Bofin and Ballynakill Harbours, Co. Gal- 

 way. In these two localities the species was frequently caught 

 during the period in which the marine laboratory was stationed 

 there. 



The other south and west coast records are : — 



Helga. 



CXVIL— 23/8/'01.— 36 miles W.N.W. of Cleggan Head, Co. Galway. 

 74J fathoms. Dredge — One, 10 mm. 



CXXI.— 24/8/'01.— 64 miles N.W.JW. of Cleggan Head, Co. Gal- 

 way. 199 fathoms. Trawl — Seven, 11-14 mm. 



W, 4— 22/3 /'04.— Dingle Bay, Co. Kerry. 35 fathoms. Trawl— One, 

 29 mm. 



W. 6— 23/3 /'04.— 7 miles S. by W. of Tearaght Lighthouse, Co. 

 Kerry. 40-53 fathoms. Temperature at 45 fathoms 8-1° C 

 — Five, 32-46 mm. 



S.R. 146— 24/8 /'04.— 80 miles W.N.W. of Slyne Head, Co. Galway. 

 181 fathoms. Trawl. Temperature at 158 fathoms 9 -52° C. 

 — One, 11 mm. 



R. 9— 3/5/'05.— 17i miles S.W.JW. of Coningbeg Lightship, Co. 

 AVexford. 40 fathoms. Trawl — One, 45 mm. 



R. 10— 3/5 /'05.— 15 miles off Mine Head, Co. Waterford. 41-42 

 fathoms. Trawl — Two, 22 and 31 mm. 



S.R. 257— 5/9 /'05.— 47 miles W.N.W. of Cleggan Head, Co. Galway. 

 105 fathoms. Large townet on bottom. Temperature at 

 100 fathoms 10-0° C— One, broken. 



W.40— W. 47— 8/9/'05.— Off Black Head, Galway Bay. 8-15 

 fathoms. Trawl. Bottom temperature 14 •0-15-1° C. — 

 Frequent in Rays' stomachs. 



R. 15—1/1 1 /'05.— 9 miles S.W. of Coningbeg Lightship, Co. Wexford. 

 37^-41 fathoms. Trawl. Temperature at 30 fathoms, 122° 

 C," salinity 35 -217 ^.„— One, 20 mm. 



W. 50—13 /2 /'06.— Blacksod Bay, Co. Mayo 4f-5i fathoms. Trawl. 

 Temperature at 4| fathoms 5-4° C. — One, 28 mm. 



P. canaliculata was found by the Royal Irish Academy ex- 

 pedition of 1886 in Berehaven and Bantry Bay, Co. Cork, and 

 the species has also been taken at Boundstone, Co. Galw^ay, 

 Valencia Harbour, Co. Kerry, and Cove, Co. Cork. 



Vertical rangc—Yound oft' the Irish coast between 3 and 199 

 fathoms, but apparently of rare occurrence outside the 100 

 fathom line. Oil the American coasts it ranges from shallow 

 water to 111 fathoms (Bathbun), while in the Mediterranean 

 it has been recorded from depths of 216 fathoms (Senna) and 

 326 fathoms (Adensamer). 



