464 Miscellaneous. 



536, 587, and 1110 fathoms, on bottoms of mud and Bihculina- 

 ooze. 



Aspidosiphon armatum, sp. n. 



Body cylindrical, 8 millims. long, covered with larger and smaller 

 chitinous plates ; posterior extremity obliquely truncated. Proboscis 

 twice as long as the body, set all over with hooks, and furnished 

 with from tea to twelve sbort tentacles. Terminal shield round, 

 nearly flat, composed of chitinous plates, which are tongue-shaped 

 in the margin, round in the centre. Besides the shield there are 

 six rings beset with plates. The anterior shield reversed heart- 

 shaped. 



A single example, at Station 87, in 64° 2' N. lat., 5° 35' E.long., 

 at a depth of 498 fathoms, on a muddy bottom. 



Onchnesoma glaciate, sp. n. 



Body cylindrical, 35 millims. long, 2 millims. broad ; its posterior 

 extremity sparingly beset with extremely fine papillae. Proboscis 

 twice as long as the body ; its anterior fourth furnished with nume- 

 rous regular rows of hooks. Skin transparent. 



Numerous examples, at five stations ranging from 65° 53' to 73° 

 47''5 N. lat., and from 7° 18' W. long, to 14° 21' E. long. Chiefly 

 on Biloculina-oozo, at depths of from 767 to 1163 fathoms ; one 

 specimen on blue clay at 634 fathoms (lat. 68° 65' N., 9° 44' E. 

 long.). 



Stephanostoma, g. n. 



Buccal disk very broad, with ten large groups of tentacles, be- 

 tween which are seated some isolated tentacles. Anal aperture 

 immediately behind the base of the proboscis. 



Stephanostoma Ifansenii, sp. n. 



Body cylindrical. Proboscis nearly as long as the body. Skin 

 firm, coriaceous. Anal orifice in a prominent papilla. Tentacles 

 placed in ten groups, sixteen in each group, and between each two 

 groups a pair of tentacles, making in all 180 ; four retractors ; 

 intestine forming a spiral. Spindle muscles. Colour — body olive- 

 green ; proboscis lighter, with a rose-coloured neck ; buccal disk 

 nearly white, with ten red streaks ; tentacles rose-coloured. 



One whole example and many fragments obtained at Station 223, 

 in 70° 54' N. lat., and 8° 24' W. long., at a depth of 70 fathoms, in 

 black volcanic sand and mud ; and a nearly perfect specimen at 

 Station 267, in 71° 42' N. lat., 37° 1' E. long., at 148 fathoms, on 

 a bottom of mud and stones. 



The authors further propose a new family under the name of 



Epithetosomatid^:, Dan. & Koren. 



Body furnished with a cylindrical hollow tube corresponding to 

 the crop-cavity. Behind this, on each side of the anterior extre- 

 mity of the body, is a fissure furnished with apertures at the bottom. 

 No hook-bristles. 



