200 ROYAL SOCIETY OF CANADA 



Styloc'Ordyi.a borealis, Lovén. 

 (Plate L, figs. 11, Ua-f.) 



Hyalonemn boréale, Lovén. 1868. Ofversist af. K. Vetenskaps Akademiens For- 

 handlingar, Stockholm, p. 1(15 and (translated) 18(58 Ann. and 

 ' Mag. Nat. Hist., series 4, vol. ii., p. 81. 



Hyalonema lont/issinnim, M. Sars. In G. O. Sars's paper on Some Remarkable Forms 



of Animal I,,ife from the great deeps off the Norwegian 

 coast, p. 70, pi. vi.. figs. 85-45. 1872. 

 Sti/lorordi/la 6o?'(o/*.s, Wy ville Thompson. 187;i The Depths^of the Sea, p. 113, 



■fig. 13. 

 Puh/mastia stiiiitata. Carter. 1870. Ann. and Mag. Nat. Hist, series 4, vol. xviii., 



p. 393. 

 Stylocordyla stipitata, Ridley and Dendy. 1887. Rep. Monaxonida, Zool. Chall. 

 Exp., vol. XX., pi. xliii., figs. 0, 7, 8, 9, p. 223. 



About a dozen specimens of this sponge were dredged during the 

 summer of 1873 b}' Mr. Whiteaves/ in from 200 to 220 fathoms, between 

 Anticosti and the south shore of the Gulf of 8t. Lawrence. 



Lovén, in the description of his sponge (Ann. and Mag. Nat. Hist.), 

 stated that the spicules of the stem had '■ near the middle a slight but 

 distinct globular inflation or nodule," and that the S})icules of the radiat- 

 ino- fibres of the head are '-of exactly the same type as those of the stem 

 but -smaller." 



Gr. O. Sars considered //. Idiujiss'nnayn to be very nearly related to 

 H. boredle, but described it as a distinct species (vide supra). 



In describing Polyniuatia stipitata, (op. cit. p. 395) Carter wrote 

 thus, •• At first 1 thought Polymastia stipitata wasj^Sars's Hyalonema 

 longissimum, since some of the specimens of the former are exactly like 

 his figures : but there is no central inflation of the spicule in any of 

 them " ; " the forms represented by Lovén's, Sars's and Thompson's figures 

 respectively of the entire sponge are all present among those dredged up 

 on board the "Porcupine," none of which have any central inflation on 

 the spicule : or if so, it must be the exception ; foi- after repeated ex- 

 aminations I have not found one." 



In the Report on the Challenger Monaxonida b}' Pidley and Dendy 

 (vol. XX., p. 223). the following paragraph occurs, "It ai>pears to us 

 highly probable that Lovcn's Jlyalonevui boréale is really the same species 

 as Carter's Polymastia stipitata in spite of thci'act that the larger oxeote 

 spicules in the former sponge are described as having a ccnti-al inflation, 

 a character which may pei-haps be considered as al)norinal, for Ijovén 

 had only two specimens for examination. Still we are not as yet con- 

 vinced of this identity." 



Yosmaer, in the '-Sponges of the AVillem Harcnts ' Expedition, 

 1880 and 1881," (p. 11), expresses the opinion that Ha,rs' s Hyalonema 



1 Iden'H;ified by him (see Report deep-sea dredging operations (Tijlf St. Lawrence 

 p. 9) with G. O. Sars's species. 



