OCR Text |
Show 1g96.] BRITISH HYDROIDS A N D MEDUSJE. 493 Entima insignis, Haeckel (1879); Garstang (1894); Browne (1895). A single specimen taken at Plymouth on 3rd October, 1893. Umbrella 7 m m . in width and 3| m m . in length. Stomach about 2 m m . long, situated on a peduncle 7 m m . long. Mouth with four large lips. Four very long perradial tentacles, about 20 mm. in length when fully expanded, wdth a pair of cirri at the base of each. About 30 marginal bulbs, each with a pair of cirri. Eight adradial marginal vesicles, each with 2-5 otoliths. The gonads are on the lower half of the peduncle along the radial canals. The medusa is perfectly colourless. Another specimen taken at Plymouth on 7th September, 1895. Umbrella 8 rnm. in width and 4 m m . in length. Thirty-nine marginal bulbs, which are not evenly distributed upon the margin of the umbrella ; the four quadrants of the umbrella possessing 9, 13, 7, and 10 bulbs. The gonads are just commencing to develop upon the radial canals, close to the stomach. The marginal vesicles with 3-4 otoliths. In other details the specimen resembles the one described above. DISTRIBUTION.-France, St. Vaast, Keferstein. England-Plymouth, Garstang ; E. T. B. Isle of Man, Browne. SAPHENIA MIRABILIS (Wright;. (Plate XVII. fig. 3.) Goodsirea mirabilis, Wright (1859). Saphenia mirabilis, Haeckel (1879); Cunningham (1891); Bles (1892); Garstang (1894) ; Browne (1895). Cunningham obtained some hundreds of specimens off the Eddystone, at night, on 16th July, 1891. The largest 12 m m . in diameter. At the end of September 1893 I found two specimens at Plymouth having the umbrella about 6 m m . in diameter, and eight marginal vesicles each with three otoliths. During September 1895 I met with a few more specimens at Plymouth. One specimen 5 mm. in wddth and 5 m m . in length. Eight marginal vesicles with 1-5 otoliths, but the majority possessed 3 otoliths. Two long opposite, perradial tentacles, with a pair of cirri at the base of each. Thirty-nine marginal bulbs, not evenly distributed between the radial canals ; a pair ofcirri usually present on each bulb. Manubrium very long. Medusa colourless. A very small medusa taken on 16th Sept., 1895, may possibly be the earliest free-swimming stage of Saphenia (Plate X V l . fig. 5 and fig. 5 a). Umbrella bell-shaped, slightly longer than wide ; about | mm. in length. Manubrium about one quarter the length of the umbrella-cavity. The stomach is not on a peduncle, but has a short conical knob at its base extending into tbe mesoglcea of the umbrella and terminating in a short apical stalk, which does not reach to the ex-umbrella. On the margin of the umbrella, two opposite, perradial tentacles, with a pair of cirri at the base of each; two opposite, perradial |