HARVARD UNIVERSITY Lis} LIBRARY OF THE Museum of Comparative Zoology f 1 ‘ 8 J < eS = © em & M QA = oO (ae Q a BY C. McLEAN FRASER oe Memori ria in (From Bullet al Museum, October 238, 1913.) No. 1, Victo SM Canada Geological Survey Victoria Memorial Museum BULLETIN No. 1 XV.—Hydroids from Vancouver Island. By C. McLean FRassEr. This report on the Vancouver Island Hydroids contains nothing essentially new, with the exception of some references to material collected in 1910 by Mr. W. Spreadborough in the neighbourhood of the Queen Charlotte islands. The basis for the report is the material already worked up for the paper on “The Hydroids of the west coast of North America”, published in May 1911, as a Bulletin from the laboratories of natural history of the State University of Iowa. The purpose of the report is simply to put in one list all the species that have been collected from the coasts of Vancouver island and to give, where possible, some notes as to their habitat, etc., that may be useful to anyone collecting hydroids in these waters. No one realizes more fully than the writer does, that this list represents but very poorly the hydroid fauna of the district, but everything must have a beginning, and what has been done already will form a basis for future work. Judging from the luxuriance of the specimens obtained from the west coast of the island and on northward to the Queen Char- lotte islands, I am firmly convinced that some systematic dredging would bring to light a hydroid fauna which would equal in richness that of any other coast. Nor is it necessary to stop at Queen Charlotte islands, as the work that has been done off the coast of Alaska gives’an indication of how rich the fauna is in that region. Between Vancouver island and the mainland at all points are conditions quite different from those 148 VICTORIA MEMORIAL MUSEUM. BULLETIN NO. I on the open coast, but in many cases no less suitable for many forms of marine life. The islands are so numerous that there is a great extent of shore line with all varieties of exposed and sheltered, bluff headlands and sloping beaches. Best of all are the areas in the larger straits and bays at the termini of the narrow channels where the tide-rip brings such an abundance of food supply for all sorts of marine forms. To give one illustration: in Northumberland strait at a point about 5 miles southeast of Nanaimo, Dodds narrows enters it from the west, while Gabriola island forms a boundary to the east. At low slack tide Dodds narrows seems a rather insignificant passage, but when the tide turns and rushes through it must be a powerful boat that can make headway against it. Ina small area in the strait at or near the mouth of the narrows, over 20 species of hydroids were obtained in a couple of hours’ dredging. Such situations abound in the Gulf of Georgia. The work has only been started but it promises well. If at some time in the near future the Department of Fisheries could see its way clear to equip and man a boat to do such work as the “Albatross” and the “Fishhawk”’ have been doing and are doing for the U.S. Bureau of Fisheries, there need be no lack of opportunity for doing good work. If such were carried out, it would not be long before the number of species of hydroids reported would be many times the present number. The collections that have been reported on are as follows: (1) Some shore forms collected by the writer at the Minnesota Seaside Station, in the summer of 1903. (2) Material collected by Rev. G. W. Taylor, on a trip to Queen Charlotte islands and other points to the north of Vancouver island, previous to 1908. (3) Collections made at Departure bay in 1908 and 1909. These consisted of shore forms near the laboratory on the mainland, and on the various islands near by, of forms dredged right in the bay between the station and the outer islands and some dredged farther out, outside of Newcastle island and over towards Gabriola island. (4) Collections made chiefly by dredging in Northumberland strait, at the entrance to Dodds narrows and reported in the West Coast paper as from Dodds narrows. (5) Some shore material collected by Mr. John Macoun at Victoria in 1908. (6) Collections made by Dr. A. HYDROIDS FROM VANCOUVER ISLAND 149 G. Huntsman and by Messrs. Macoun, Spreadborough, and Young off Amphitrite point near Ucluelet in 1909. (7) Material collected off Queen Charlotte islands by Mr. Spreadborough in 1910. In giving the names of the species I have made no attempt at giving synonymy, but instead have referred to the page in the paper on the West Coast Hydroids where the synonymy may be obtained. VANCOUVER IsLAND Hyprorps. ENDOCRYPTA HUNTSMANI Fraser.—(p. 19). ‘The generic name Crypta was at first used for this species, but later it was found that the name was preoccupied in both the Mollusca and the Coleoptera and notice of the change was published in Science Vol. XXXV, No. 893. Feb. 9, 1912, p. 216. It would be of interest to investigate further the life history of this species. Its habitat, so far as I am aware, is entirely unique. The location in which it is found seems a very suitable one for obtaining a food supply, while the fact that so many colonies were found would indicate that their presence was not a matter of accident. If one could only find out how much of the life cycle was passed within the branchial basket of the ascidian it might give an indication of the way in which these colonies are implanted without being injured in any way by the ascidian. I knew nothing about the species until within a few days of my departure, hence though I got a good many colonies they were almost all obtained in the one day, and were all within a comparatively narrow range of development. The ascidians containing the specimens were all obtained by dredging in the shallow water near the station, principally be- tween Brandon island and the mainland and seldom in more than 7 or 8 fathoms of water. SYNCORYNE MIRABILIS (Agassiz).—(p. 21). This species has not been reported from Canadian waters from the west coast unless Agassiz’ reference from the Gulf of Georgia applies. In the material collected by Mr. Spreadborough at Queen Char- lotte islands there were numerous specimens growing on Gar- vera annulata. 150 VICTORIA MEMORIAL MUSEUM. BULLETIN NO. I GARVBIA ANNULATA Nutting.—(p. 22). Some small speci- mens were obtained at Port Renfrew. They were growing on & sponge attached to the surface of overhanging rock just below extreme low water. Those collected at Ucluelet were growing on & sponge also. Mr. Spreadborough obtained some excellent specimens, much larger than the others, at Queen Charlotte islands. PERIGONIMUS REPENS (Wright).—(p. 24). Only a few speci- mens were obtained growing on small gastropod shells in the deep waters of Departure bay in about 15 or 20 fathoms. KUDENDRIUM CALIFORNICUM Torrey.—(p. 24). Some speci- mens were found at Port Renfrew, attached to the rocks at low tide. Those obtained at Ucluelet were finer specimens. HYDRACTINIA AGGREGATA Fraser.—(p. 25). The gastropod shells on which these specimens were found, were dredged near the rocky ledge in front of the laboratory, in from 5 to 8 fathoms. HYDRACTINIA MILLERI Torrey.—(p. 27). Fairly common at Port Renfrew; found growing over colonies of encrusting bry- oz0a. These masses can be chipped off readily bringing the colonies of Hydractinia with them. TUBULARIA cRocBA (Agassiz).—(p. 27). Some specimens growing on a piece of stick were obtained in some material col- lected by Mr. Taylor at Port Simpson. TUBULARIA HARRIMANI Nutting.—(p. 28). One lot of fine specimens was obtained at Port Renfrew. CAMPANULARIA DENTICULATA Clark.—(p. 29). Somewhat common on the laminaria growing in the shallow water to the east of the station. CAMPANULARIA ExIGuA (Sars).—(p. 30). A few specimens were found growing on Garveia annulata, in the Ucluelet ma- terial. CAMPANULARIA GRENLANDICA Levinsen.—(p. 31). As pre- viously stated, but one specimen was found, this growing on Lafea gracillima at Port Renfrew. CAMPANULARIA KINCAIDA Nutting.—(p. 31). There was but one representative of the species, from Dodds narrows. In this case as in the previous one the individual specimen was in. such good condition that there was no difficulty with the diag- nosis. HYDROIDS FROM VANCOUVER ISLAND 151 CAMPANULARIA RARIDENTATA Alder.—(p. 32.) Specimens from Departure bay and from material obtained by Mr. Taylor, from the Queen Charlotte islands, were found growing on fucus holdfasts. CAMPANULARIA URCEOLATA Clark.—(p. 33). Apparently very abundant at Queen Charlotte islands, as, in the material collected by Mr. Taylor as well as that collected by Mr. Spreadborough, the colonies growing over other hydroids were numerous. It was quite plentiful in the Dodds Narrows material, growing on Abietinaria filicula and at Port Renfrew on EHudendrium califor- nicum. CAMPANULARIA VERTICILLATA (Linnzus).—(p. 33). The best specimens were obtained by Mr. Taylor from Queen Charlotte islands; those from Dodds narrows were badly broken up and there were not many of them. CAMPANULARIA VOLUBILIS (Linnzeus).—(p. 34). Rather scarce in both Banks Island and Ucluelet material. CLYTIA EDWARDsI (Nutting).—(p. 34). Abundant, growing on the laminaria in shallow water east of the station in the bay. EUCcOPELLA EVERTA (Clark).—(p. 37). At Port Renfrew this species was growing on a small stalked ascidian and in Departure bay on laminaria in company with Sertularella turgida. GONOTHYR#A CLARKI (Marktanner-Turneretscher).—(p. 37). This species and Clytia edwardsi are the commonest of the Cam- panularian species in the Departure Bay neighbourhood. This does not signify that they are found together. Clytia edwardsi is found almost entirely on laminaria within the bay; Gonothyrea clarki is found growing on the smaller alge in tide pools in more exposed locations, e. g. on the outlying rocks at the east and the west of the entrance of Hammond bay. OBELIA BOREALIS Nutting.—(p. 38). Plentiful in the Ucluelet material. OBELIA DICHOTOMA (Linnzus).—(p. 38). Not very plentiful in Departure bay. Specimens obtained from Newcastle island. OBELIA DUBIA Nutting.—(p. 38). Not common though found in small quantities at Ucluelet, Dodds narrows, Departure bay, and later at Queen Charlotte islands. OBELIA GRIFFINI Calkins.—(p. 39.) But one colony found at Departure bay. 24853—10 152 VICTORIA MEMORIAL MUSEUM. BULLETIN NO. I OBELIA LONGISSIMA (Pallas).—(p. 39). A few specimens from Departure bay, some from Dodds narrows in poor condition and some from the material from Banks island. OBELIA PLICcATA Hincks.—(p. 39). Not common, but a few good specimens were obtained by dredging near the rocky ledge — in the bay. CALYCELLA pyGM4a Alder.—(p. 41). Common in Departure bay and Dodds narrows. CALYCELLA SYRINGA (Linnzus).—(p. 42). Plentiful in the material from Banks and Queen Charlotte islands. In my former paper I discussed these two species at some length. Since that paper was written I have had the oppor- tunity of studying material from many localities along the Atlantic coast only to find that the same differences exist there as here. The difference in size seems to be rather definite, but it seems strange when so many specimens of the smaller form have been found that the gonosome has never appeared, while it is commonly found with the larger form. Until a gonosome is found with the smaller or until its life history is further worked out than it is at present, it is impossible to say whether or not it is a distinct species. For the present, on account of the difference in size, it seems better to retain the two specific names. CUSPIDELLA HUMILIS (Alder).—(p. 44). Common on Lafea- gracillima dredged outside of the main entrance to Departure bay, 25 fathoms. LOVENELLA PRODUCTA (Sars).—(p. 44). Few specimens growing on serpulid tubes in material dredged in Dodds nar- rows. HALECIUM ANNULATUM Torrey.—(p. 46.) Growing on alge at Port Renfrew and Dodds narrows and on stalked ascidians at Ucluelet. HALEcIUM DENSUM Calkins.—(p. 47). Excellent specimens of this species were obtained from Port Renfrew at low tide, and from Ucluelet at a depth of 30 fathoms. HaLECIUM HALECINUM (Linneus).—(p. 47). ) 3] 2 p =| Se) 4) fy Og a8 oi| Ste < AO e) 8 Ss After C.M.F. Clara A. Fraser, del. ds of Nova Scotia. i Hydro 183 EXPLANATION OF PLATE XII. Figs. 1 and 2. Obeliageniculata. Colony showing abnormal position of the gonangia. “ 3and 4. Halecium minutum. Portion of colony showing trophosome and gonangium. Magnification about 202diameters. 184 Vicror1a MemoriaL MuseumM BuuetTin No. 1 Shan SSO Clara A. Fraser, del. After C.M.F. Hydroids of Nova Scotia. 185 EXPLANATION OF PuaTE XIII. Fig. 1. Cryptolaria triserialis. Non-fascicled portion of a branch. “2. Portion of mainstem. _ Magnification about 20 diameters. ie 7 : 186 Puate XIII TORIA MEMor1AL Museum Buuetin No. 1 After C. M. F. Clara A. Fraser, del. Hydroids of Nova Scotia. Date Due