761 



MARINE AND FISHERIES 



6-7 EDWARD VII., A. 1907 



hydroid was dredged in 20 fathoms. It answers in every respect to the one of August 

 the first. The median avicularium is present on most of the cells, and some of them 

 are of good size. Spines vary from one to three, and toward the upper part of tbe 

 colony they are very long. 



Scrupocellaria elUptica (Beuss). — A branch of this species about two centimetres 

 high was taken from a stone brought up by a trawl from 30 to 50 fathoms. It is twice 

 dichotomously branched ; the vibracula are very long and serrated on one margin ; the 

 spines above the orifice vary greatly in length, and many are very long. 



Caherea ellisii (Fleming). — This species is common. It was dredged in 30 to 50 fa- 

 thoms, attached to a sponge and to Terebratulina septentrionalis; considerable quanti- 

 ties of it were also dredged in 20 fathoms attached to Balanus, stones, &c. 



FAMILY : BICELLARIIDiE. 



Bugula Sip. — One specimen about one inch in length was found on a mussel shell 

 {Mytilus edulis) taken just below low water under a wharf at Canso. The zoarium 

 is ascending, racemose, regularly dichotomously branched, the branches being rather 

 narrow, and composed regularly of two series of zooecia alternate with each other. The 

 zooecia are long, slightly tapering toward the base, and have at the upper part of the ori- 

 fice five spines. The largest spine is at the upper outer corner; right in front of the 

 larger spine is another one; a pair of spines, one on each side of the peristome, arise 

 just below the other spines and almost or quite overlap each other; the lower inner 

 spine sometimes absent; the orifice is very large, occupying almost the whole front of 

 the zooecium. Avicularia are entirely marginal in the form of bird's heads. They are 

 pedunculated, and one is attached to the outer margin of each zooecium con- 

 siderably above the middle; they are stout, being about two-thirds as broad as long^ and 

 have both beaks hooked; they are attached by a disk -like base; the ooecia are almost 

 globular, flattish at the lower end; they are raised, and attached by a narrow neck to 

 the zooecium below. On one polypide I counted twelve tentacles, on another thirteen. 

 This species differs from B. avicularia in the form of the zoarium, the number of 

 spines, in the fact that the avicularia are not elongated but quite? Bitout,) and in the 

 number of tentacles. 



family: membraniporid^. 



Menhranipora pilosa (Linnseus). — This is found very commonly about Canso in 

 depths of 10-15 fathoms. I found it on fronds of Rhodymenia palmata, Piilota plu- 

 mosa, and on the stipes of Laminaria longicruris washed up on the beaeh. It some- 

 times forms narrow patches one inch long and two to four cells wide on Rhodymenia, 

 and in this case the basal spine is aborted, but the peristome is surrounded by about 

 five rather short spines directed toward the centre of the peristome. Another peculiar- 

 ity of this specimen is that on each side of the peristome there is an elliptical, trans- 

 parent patch about one-fourth the diameter of the peristome. On Laminaria it forms 

 encrusting masses, covering frequently the whole stipe. In these the basal spine is 

 present but very short, and the marginal spines are often reduced to two lateral ones 

 near the upper edge of the peristome. The peristome is very large, about one and one- 

 half times the length of the tube below it.^ Specimens got on Rhodymenia and Ptiloi^j 

 near Cranberry Light, in 15 fathoms, formed white encrusting masses, and had typical 

 structure with very long basal spines. 



Memhranipora lineata (Linnaeus). — Small patches were found quite frequently on 

 Laminaria just below tide-mark. They are quite normal, except that some have as 

 many as fourteen spines. A beautiful lace-like colony, two inches long, was found on 

 a mussel shell. Every cell had a very prominent avicularium just below its orifice, 

 which is raised greatly, and has its acute mandible never pointing down but always 



