284 DISCOVERY REPORTS 



Bougainvillia macloviana Lesson (Plate XIV, fig. 6; Plate XV, figs. 7-14). 



Cyanaea bougainvillii Lesson, 1830, p. 118, pi. 14, fig. 3. 



Bougainvillia macloviana Lesson, 1836, p. 262. 



Bougainvillia macloviana Lesson, 1843, p. 290. 



Hippocrene macloviana Haeckel, 1879, p. 90, Taf. V, figs. 1-2. 



Hippocrene macloviana Pratt, 1898, p. 15. 



Hippocrene macloviana Browne, 1902, p. 278. 



Hippocrene Benham, 1909, p. 306, pi. 12, figs. 1-2. 



Bougainvillia macloviana Mayer, 1910, p. 160. 



Bougainvillia macloviana Hartlaub, 1911, p. 156, fig. 139. 



Hippocrene macloviana VanhoflFen, 191 1, p. 208. 



Hippocrene macloviana Vanhoffen, 1912 a, p. 359, Taf. H, fig. i. 



^Hippocrene macloviana Vanhoffen, 1912 b, p. 11, Taf. 1, fig. 7; Taf. H, fig. lo. 



Bougainvillia macloviana Hartlaub, 1917, p. 406. 



Bougainvillia macloviana Kramp, 1928, p. 50. 



Bougainvillia macloviana Kiinne, 1933, p. 249, fig. i. 



Specific characters. Adult (Plate XIV, fig. 6) : Umbrella bell-shaped, as high as 

 broad or a little higher than broad, with a quadrangular margin ; longitudinal furrows on 

 the exumbrella ; gelatinous substance fairly thick, evenly rounded at the apex. Stomach 

 small, cubical, situated on a broad, inverted cone-shaped, gelatinous peduncle; the 

 stomach with four narrow perradial lobes extending along the whole length of the 

 peduncle. Mouth small, with four short perradial hps, about two-thirds down the 

 umbrella cavity. Oral tentacles four, perradial, closely and thickly branched, each with 

 about 80-100 or more terminal branches with small clusters of nematocysts ; basal, 

 unbranched portion of oral tentacles very short. Gonads upon the stomach and the 

 lobes of the stomach, hanging down in a folded band from the peduncle. Compound 

 basal bulbs four, perradial, V-shaped; about 35-65 tentacles in each bulb, arranged in a 

 double row. An ocellus at the base of every tentacle. Colour: Stomach, gonads, and 

 compound basal bulbs pale yellow (in formalin or alcohol). Ocelli black. Size: Up to 

 15 mm. in height and 15 mm. in width. 



The collection from 1898 to 1899 contains about 170 specimens of this species; the 

 second collection, 1901-2, contains about 350, and in addition some beautifully pre- 

 served examples are at hand from November 1909 and January 1910. The specimens 

 were all collected in Stanley Harbour, and all stages of development are represented, 

 from the earliest up to the fully developed adult. 



Extracts from R. Vallentin's notes: " 11 November 1898. Very abundant under the 

 stern of ' Great Britain ' (a coal hulk moored in Stanley Harbour), very scarce elsewhere 

 m the harbour." "12 November. Early stages with three tentacles on each bulb found 

 near the stern of Great Britain'." " 26 November. As abundant as ever." During the 

 following time the species was repeatedly noted as "abundant". "4 January 1899. 

 Steadily decreasing in numbers after the gale from the East." After that date it was 

 never common. "6 February. A few seen, but they were all small." "5 November 

 1 90 1. "A fair number observed in the sea." "12 November. Adult specimens scarce, 

 a few youngsters present." " 21 November. Increasing in numbers." Apart from a few 



