328 On some new Species of the Genus Solenopus. 
extremity it decreases in thickness; the posterior extremity 
obliquely truncated. Calcareous spicules all over the body. 
Habitat. Lofoten, 2-300 fathoms, Hasvig (Finmark), 60- 
150 fathoms (Prof. G. O. Sars) ; Sondfjord, 100 fathoms 
(Koren). Station 79 (Norwegian Atlantic expedition), lat. 
64° 9' N., long. 6° 6', 157 fathoms. Temperature 46°'22 F. 
Clayey sand. 
4. Solenopus incrustatus , Ivor. & Dan. 
Body cylindrical, 30 millims. long, 3 millims. broad, pointed 
towards the anterior, truncate at the posterior extremity, 
strongly incrusted with particles of sand, so that it has a 
rugged appearance. Mantle destitute of the spear-shaped 
calcareous spicules along the back. 
Habitat. Hasvig, Finmark, 2-300 fathoms (Prof. G. O. 
Sars). 
5. Solenopus margaritaceus , Kor. & Dan. 
Body round, thick, strongly glistening, pointed towards the 
anterior extremity, almost tranversely cut off at the hinder 
end, 12 millims. long, 1*5 millim. in thickness at the broader 
posterior extremity. Mantle covered with needle- and lancet¬ 
like calcareous spicules. 
Habitat. Hvidingsoerne, Stavanger, 40-60 fathoms (Prof. 
G. O. Sars). 
6. Solenopus borealis , Kor. & Dan. 
Body cylindrical, 25 millims. long, 3 millims. broad, rounded 
and rather narrower at the anterior end, truncate at the hinder 
extremity, and incrusted with sand. Along the whole of 
the back runs a rather fine but sharp line, which is but slightly 
elevated, and richly beset with short, thick, needle-shaped 
Habitat. Lofoten, 40-50. fathoms (Prof. G. O. Sars). Sta¬ 
tion 18 (Norwegian Atlantic expedition, Danielssen), lat. 62° 
8' N., long. 1° 8', 400 fathoms, clayey sand. Temperature 
29°-66 F. 
7. Solenopus Sarsii , Kor. & Dan. 
Body cylindrical, 70 millims. long, 3 millims. broad; the 
hinder end cut off transversely, the anterior prolonged like a 
Habitat. Cliristianiafjord, 100-200 fathoms (Prof. G. O. 
Sars). 
