[lambb] sponges from THE ATLANTIC COAST OF CANADA 203 



Tethea muricata ? Whiteaves. 1874. Report on deep-sea drerlt^irig operations in 

 the Gulf of St. Lawrence and Am. Jour. Sci. and Arts, vol 

 vii., p. 2. 



Dorvillia echinafa, Verrill. 1874. Am. Jour. Sci. and Arts, vol. vii., p. .501. 



Thenea Wallichii and Thenea muricata, Sollas. 1882. Ann. and Mag. Nat. Hist., 



series ô, vol. ix., p. 427, pi. xvii. 



Thenea muricata, Vosmaer. 1885. The sponges of the " Willem Barents " Ex- 

 pedition, 1880 and 1881, p. 4. 

 " " Sollas. 1887. Rep. Tetractinellida, Zool. Chall. Exp. vol. xxv., 



p. 95, pi. vii., tig. 'S. 



Tethea iauric<(ta was first mentioned by Bowerbaiik as a M.S. name 

 in 1858 ; since then it has been de^ci-ibed under different names by many 

 authors. SoHas in the Ann. and Mag. Nat. Hist, enters at some length 

 into the history of this sponge and describes its characters. A complete 

 synonymy by the same author may be found in vol. xxv. of the Chal- 

 lenger- Eeporls. 



The specimens collected by Mr. Whiteaves are somewhat abnormal 

 in shape. The osculum instead of being situated in the centre of the 

 upper portion is at one side, whilst the " equatorial recess " occupies the 

 other side. The roots proceed from the rather pointed base. 



LocaUtji. — Between Anticosti and the south shore of the Gulf of St. 

 Lawrence, in 220 fathoms, three rather small but perfect specimens, 

 preserved in alcohol, J. F. Whiteaves. 1873. 



Distribution. — Gulf of St. Lawrence (J. F. Whiteaves) ; northeast 

 coast of the United States (Verrill) ; Batfin Bay, lat. 75° 20' iST., long. 

 67° 27' VV., Davis Strait, lat. 59° 33' K, long. 43° 25' W. and east coast of 

 Greenland (T^'ristedt) . 



Foreign distribution. — Vigten Island, Norway (Bowerbank) : off the 

 coast of Portugal and off the Fa'roe Islands (Wyville Thompson) ; Ivors 

 Fiord, Norway (Sollas) ; lat. 71° 52'2 N.. long. 19° 47' E. to lat. 72° 

 36'5 N., long. 25° 58' E. (Vosmaer;. 



CALCAEEA. 



Le( COSOLENIA CANCELLATA. Verrill. 



I 



(Plate III., figs. 5, 0(1, 5b, 5r, h<l.) 



Leucosolenia cancellata, Verrill. 1874. Explorations of Casco Bay, Pro. Am. Ass. 



Adv. Sci., p. 393. 



The only specimen representing this species consists of a small eolony 

 forming an irregular mass about l4 mm. across at the broadest part and 

 Ô mm thick. 



The spicules are triradiate and quadriradiate. Simpk' triradiates and 

 triradiates with an incipient or aborted fourth ray are the principal and 

 most abv.ndant spicules ; they vary considerably in size, but the average 

 ic.nglh of the basal ray, which is slightly longer than the two lateral 



