. Bulletin of the Natural History Museum Zoology. . Fig. 10 Bracts of Bargmannia amoena sp. nov. Scale bars: A, B, C = 1 mm, D, E = 2 mm. together than on the first type, so that the distal end of the bract is relatively narrow. One of the proximal pair of teeth is usually more developed than the other, and on that side the lateral wall of the proximal part of the bract often extends out as a rounded notch. Gastrozooid and tentacle (Figure 11 A, C). The largest gastrozooids measure up to 10 mm in length. In the preserved state they are suffused with a brown coloration with, in the largest spec
. Bulletin of the Natural History Museum Zoology. . Fig. 10 Bracts of Bargmannia amoena sp. nov. Scale bars: A, B, C = 1 mm, D, E = 2 mm. together than on the first type, so that the distal end of the bract is relatively narrow. One of the proximal pair of teeth is usually more developed than the other, and on that side the lateral wall of the proximal part of the bract often extends out as a rounded notch. Gastrozooid and tentacle (Figure 11 A, C). The largest gastrozooids measure up to 10 mm in length. In the preserved state they are suffused with a brown coloration with, in the largest specimens, the basigaster having bright orange-red pigmentation. The latter (Figure 11C, bg), typically, is cup-shaped, enclosing the base of the stomach region, and is covered in large rounded ecto- dermal cells. The stomach region (Figure 11C, s) appears relatively thin and the endodermal hepatic villi can be seen within. The proboscis region can be extended to some distance. The tentacle can be several centimetres in length. It is a simple, narrow, unsegmented tube, bearing a haphazard and irregular arrange- ment of the two sorts of small nematocysts that are also found on the tentilla. In the present specimens, only a few tentilla, up to 10, remain attached close to its base. In their preserved state, the tentilla (Figure 11A) typically are highly contracted and are comprised of a short pedicel; an irregularly twisted cnidoband; and, for the most 61 part, a regularly coiled terminal filament. The cnidoband is a simple tube that, in life, is generally straight or slightly curved, and can extend to a length greater than cm. One side of the cnidoband appears to consist of a primitive elastic strand. It is not tightly folded, as is the case in some other physonect species, but a few pleats are present. The other side of the tentillum is comprised of numer- ous rows of small nematocysts of two types, as was the case in B. elongata. These are ovoid, measuring 20 x 14 urn and 12x1
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Keywords: ., bh, bookcentury1900, bookcollectionbiodiversity, bookleafnumber63
