Medusae of the world . en the animal is about 20 mm. in diameter (plate 26, fig-4), the bell becomes quite flatand the cruciform mouth has extended about half-way down the 4 radial-canals. In theadult they finally reach the circular vessel and the radial-canals give rise to small, blindlyending, lateral diverticula. This medusa is abundant north of Cape Cod, but is rarely seen except in early springupon the southern coast of New England. It makes its appearance in Massachusetts Bayearly in April, becomes mature in June, and disappears before the middle of July. At East-port, Maine, however, th
Medusae of the world . en the animal is about 20 mm. in diameter (plate 26, fig-4), the bell becomes quite flatand the cruciform mouth has extended about half-way down the 4 radial-canals. In theadult they finally reach the circular vessel and the radial-canals give rise to small, blindlyending, lateral diverticula. This medusa is abundant north of Cape Cod, but is rarely seen except in early springupon the southern coast of New England. It makes its appearance in Massachusetts Bayearly in April, becomes mature in June, and disappears before the middle of July. At East-port, Maine, however, they remain common until October. Mature individuals were found inNewport Harbor, Rhode Island, from June 5 to 9, 1895. Hartlaub, 1897, has found thisspecies at Helgoland, and Wagner, Linko, and Birula have obtained it in the seas north ofRussia, and Levinsen records it from the coast of Greenland. It is evidently, therefore, anArctic species, and this fact, together with its similarity to Brandts figures of Staurop/tora. Fig. — Staurophora medusa drawn by theauthor, from specimen 25mm. in diameter. WoodsHole, Massachusetts. LEPTOMEDUS/E—STAUROPHORA, SAPHENIA. 29.! mertensii of the Aleutian Islands, North Pacific, inclines me to believe that our AmericanStaurophora is identical with the Pacific form and should be called S. mertensii. A directcomparison of specimens is necessary in order to determine this positively, but the figurespublished by Brandt might certainly have been drawn from our Staurophora of the coast ofMaine, United States. Hartlaub, 1897, finds that the young medusa grows rapidly if fed upon copepods. Staurophora falklandica Browne. Staurophora falklandica, Browne, 1908, Trans. Royal Soc. Edinburgh, vol. 46, part 2, p. 235, plate I, figs. 1-8. This medusa from the Falkland Islands, South Atlantic, resembles the Arctic <S. mertensiiin all respects excepting that in the single specimen studied by Browne, the small tentacleslack ocelli; they ma
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectcnidari, bookyear1910
