[lambb] sponges from THE ATLANTIC COAST OF CANADA 191 



Foreign distribution. — Coasts of England and Scotland (Jolinston 

 and Bowerbank). 



lopiioN CHELIFER, Eidley and Dendy. 



lophon chelifcr, Ridley and Dendy. 1886. Ann. and Mag. Nat. Hist,, series 5, vol. 



xviii., p. 349. 

 " " Ridley and Dendy. 1887. Rep. Monaxonida, Zool. Chall. Exp. 



vol. XX., p. 119, pi. xvL, fig. 3 and pi. xvii., figs. 1, 3, 8. 

 " " Lambe. 1893. Sponges from the Pacific coast of Canada, Trans. 



Royal Soc. Canada, vol. xi., p. 30, pi. ii., figs. 7, 7a—/. 



This sponge occurs on the Gaspé coast and in spicnlation is exactly 

 similar to the specimens from the Yancouver district. There are four 

 fragments in all ; they are amorphous, honey-combed and of a dark- 

 brown colour ; the largest piece is about 32 mm. through. 



Locality. — Gaspé, four small fragments, dry, Sir William Dawson. 



Distribution. — Gulf of St. Lawrence ; Yancouver Island (G. M. Daw- 

 son ) . 



Foreign distribution. — Off the Cape of Good Hope, off Prince Edward 

 Island (lat. 46° 41' S., long. 38° 10' E.) and otf Crozet Island (Challenger). 



Myxilla incrustans, Johnston. 

 (Plate I., figs. 10, 10a, 10^. 10c, IM.) 



Ilalichondria incrustans, Johnston. 1842. British Sponges, p. 122, pi. xii., fig. 3 



and pi. xiii., fig. 5. 

 Ilalichondria saburrata, Johnston. 1842. Ibid, p. 120, pi. xi., fig. 3 and p. 197. 

 Ilalichondria incrustans, Bowerbank. 1866. Mon. Brit. Spong. vol. ii., p. 249 ; 



vol. iii., p. 108, pi. xliv., figs. 7 12 and vol. iv., p. 110. 



This species is represented in the collection by two si^ecimens ; one 

 incruststhe under or flat valve of Pecten (^Amusium) tenuirostata, Mighels, 

 to a thickness of 8 mm., the other is a small unattached piece about 

 25 mm. broad and 10 mm. thick. 



Measurements of the spicvdes gave the following results— (a) Megas- 

 clera ; (1) Styli, entirely spined ; from 0-124 to 0'209 mm. long and 

 0003 to 0009 mm. thick (Plate I., fig. 10). (2) Tornota, slightly 

 spined at the ends, varying in length from 0-144 to 0-209 mm. with a 

 maximum thickness of 0-006 mm. (Plate I., fig. 10a). (b) Microsdera ; 

 (1) isochela- ; from 0-032 to 0-()45 mm. long (Plate I., fig. 106). Small 

 isochelœ, evidently young undeveloped forms of the large ones, are 

 yn'esent ; they have a maximum length of 00 19 mm. The large forms 

 seem as a rule to have two teeth at each end, but they are also tridentate. 

 ''2) Sigmata, simple and contort ; from 0-019 to 0032 mm. in length 

 (i^late I., fig. 10c, \M). 



Locality. — Gaspé coast, two specimens, dry, Sir William Dawson. 



Foreign distribution. — Coasts of Great Britain (Johnston, Bowerbank), 



