160 THE ROYAL SOCIETY OF CANADA 



the portion of the hydrotheca nearest the operculum may be ribbed 

 longitudinally. As is the case with the majority of the Campanu- 

 linidœ the operculum may be inverted. 



Gonosome. — Unknown. 



Distribution. — Dodds Narrows, San Juan Archipelago (Fraser); 

 common, found off Lasqueti I., Nanoose Bay, off West Rocks, off 

 Clarke Rock, Departure Bay, north of Gabriola I., east of Protection 

 I., Northumberland Channel, Dodds Narrows, Gabriola Pass, Whale- 

 boat Passage, off Matia I., Griffin Bay, Friday Harbor. 



In looking over some specimens of this species from Griffin Bay 

 and others from West Rocks, I found that several of them had from 

 1 to 3 appendages very similar to those described by Allman in 

 Oplorhiza parvula 24 which he described as being "in the form of tubular 

 receptacles with an orifice in the summit, which enclose a granular, 

 fleshy column, supporting a cluster of thread-cells." In his species, 

 however, they are found on the hydrorhiza while here they are found 

 on the pedicel a short distance below the hydrotheca. On this char- 

 acteristic he instituted the new genus Oplorhiza. More recently, 

 Pictet and Bedot found a species in material from the Gulf of Gascony 

 that they named Campanularia armata, 25 in which appendages spoken 

 of as being small, spherical, pedunculate nematophores, were found 

 growing from the tubes of the polysiphonic stem. They did not con- 

 sider it necessary to make a new genus for the species but retained it 

 in the genus Campanularia. The appendages above referred to, are 

 even more like these last mentioned. The species, Lovenella producta, 

 is widely distributed in the region, but only in the specimens from the 

 localities mentioned have I seen anything of these appendages, the 

 presence of which has been considered of specific and even of generic 

 value. 



Genus OPERGULARELLA 



Trophosome. — Hydrotheca elongated-oval with no distinct margin ; 

 operculum segments long and narrow. 



Gonosome. — Reproduction by sporosacs which are extruded into 

 an acrocyst. 



Opercularella lacerata (Johnston) 



PI. XVIII, Fig. 65 



Campanularia lacerata Johnston, Br. Zoophytes, 1847, p. 111. 

 Opercularella lacerata Hincks, Br. Hydroid Zoophytes, 1868, p. 114. 

 Trophosome. — Stem short, reaching a height of 15-25 mm., 



24 Mem. Mus. Comp. Zool., Harvard, vol. V, no. 2, 1877, p. 14. 



25 Hydraires provenant des Campagnes de l'Hirondelle, 1900, p. 9. 



