306 
THE VOYAGE OF H.M.S. CHALLENGER. 
Hue mud. Also dredged at Station 49 (soutli of Halifax, Nova Scotia), May 20, 1873 ; 
lat. 43° 3' N., long. 63° 39' W.; deptli, 85 fathoms ; bottom temperature 35°’0, surface 
temperature 40°'5 ; sea-bottom, gravel and stones. 
The tube from Station III. is composed of somewhat large fragments of shells and 
Fig. 62. 
Fig. 61. — Maxillse and dental plates of Nothria conchylega ; x 20 diameters. 
Fig. 62. — Mandibles of the same, from the ventral surface ; x 20 diameters. 
JDorocidaris, besides Foraminifera and other structures. The branchiae commence on 
the tenth foot. 
In the instances from Station 49, the tubes are composed of fragments of shells 
with a few stones, and therefore are in contrast with those from the GuK of St. 
Lawrence, Canada, which (tubes) are almost wholly formed of small stones. The 
branchiae commence on the eleventh segment. The egg-capsules in the mature females 
are beauitfully and distinctly punctated. 
