146 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.37. 



hydroids, but a few of the typical discoid form occur on Laminaria, 

 etc. Reported by Packard (not as spirillum, but as S. porrecta, teste 

 Verrill). 



SPIKORBIS CANCELLATUS (Fabricius) Morch. 



Egg Harbor, August 10, T fathoms, mud. One thick-walled, dex- 

 tral tube showing carinse, three teeth at the aperture, and series of 

 basal pits exactly like Levinsen's figure 18. xVlso in Packard's list. 



SPIRORBIS VALIDUS Verrill. 



Egg Harbor, August 10, 7 fathoms, mud ; Shoal Tickle, August 15, 

 25 fathoms, gravel; Komactoroic Bay, north of Nakoak, 5 fathoms, 

 rocky. Several tubes attached to pebbles, a broken shell of Sipho 

 islandica, and to bryozoans. Both discoid and ascending forms occur, 

 and a few small ones may possibly be S, tubcEformis. Previously 

 known from Greenland, Grand Banks, etc. 



