Medusae of the world . Plate 37. Fig. 1. Eucheilota duodecimahs. Immature female, with only 4 lithocysts. Agassiz Laboratory, Newport, Rhode Island, September 19, 1896. See page 2. Eucheilota duodecimalis. Mature female, with 12 lithocysts. Agassiz Laboratory, Newport, Rhode Island, September 7, 3 to 3. Eucheilota paradoxica. Producing medusa-buds upon its gonads. Figure 3, medusa-bud about to be set free from the gonad of the parent medusa; figure 3, section of the gonad and budding medusa. Tortugas, Florida; and Nassau, Bahamas, June 1899, 1903. See page 4. Euche
Medusae of the world . Plate 37. Fig. 1. Eucheilota duodecimahs. Immature female, with only 4 lithocysts. Agassiz Laboratory, Newport, Rhode Island, September 19, 1896. See page 2. Eucheilota duodecimalis. Mature female, with 12 lithocysts. Agassiz Laboratory, Newport, Rhode Island, September 7, 3 to 3. Eucheilota paradoxica. Producing medusa-buds upon its gonads. Figure 3, medusa-bud about to be set free from the gonad of the parent medusa; figure 3, section of the gonad and budding medusa. Tortugas, Florida; and Nassau, Bahamas, June 1899, 1903. See page 4. Eucheilota bermudensis, young medusa. Tortugas, Florida. June 17, 1899. See page 5. Eucheilota ventricular is, young medusa. Tortugas, Florida. June, 1899. See page 6. Blackfordia virginica, mature medusa. Hampton Roads, Virginia. October 31, 1904. For details see figures 3 to 5, plate 36. Drawn from life, by the —BLACKFORDIA. 277 Halopsis (Mitrocoma) cruciate, 1865 (North Amer. Acal., p. 102, figs. 151, 152). Dr. Agassiz,however, describes cirri upon the bell-margin between the tentacles in H. cruciata, and statesthat there are but 12 marginal sense-organs, 3 in each quadrant. In Blackfordia there are nocirri and the marginal sense-organs are very numerous. Blackfordia is distinguished fromPhtaluaum and Phtalopsis by the absence of permanently rudimentary tentacles or cirri. The medusae of Blackfordia are also quite similar to Tiaropsis in the appearance of themanubrium and general shape of the bell, but in Tiaropsis there are but 8 marginal sense-organs and the entodermal cores of the tentacles do not project inward into the gelatinoussubstance of the bell, as in Blackfordia. The type species is Blackfordia manhattensis, found off the coast of New Jersey, UnitedStates. Blackfordia manhattensis, sp. nov. Plate 36, figs. 2-2. Bell 10 mm. in diameter, higher than a hemisphere, wit
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectcnidari, bookyear1910
