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'Alert' 1881-2

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670 EXPLANATION OF THE PLATES.<br />

Serpulid or Vei^meius-shcll, and forms several roots.] Re-<br />

duced to ono tliird nat. size.<br />

Fig. L. lotrocliota pwyurea. A small but symmetrically developed<br />

dry specimen from Torres Straits or its neighbourhood.<br />

Nat. size.<br />

M. /. haculifera. Portion of type (spirit) specimen on stone,<br />

from Port Darwin, between tide-marks. Nat. size. [The<br />

small pointed conuli are not quite so well marked on<br />

this as on the reverse side of the specimen.]<br />

N. Sclimidtia variahilis. The greater part of the type specimen<br />

(spirit), from Port Darwin, 7-12 fms. [Seen from<br />

the side, the true base is towards the right-hand margin of<br />

the plate.] Reduced to two thirds nat. size.<br />

0. PelUna aliformis. The type specimen (inspirit), from Port<br />

•Darwin, 7-12 fms. Seen from one side, one wing almost<br />

concealing the other. Nat. size.<br />

Plate XL.<br />

Fig. A. EcTiinodictyum glomeratum. Type specimen (dry), from<br />

Thursday Island, Torres Straits, 4-5 fms. Nat. size.<br />

B. PacJiijcJtcdina macrodacti/la, portion, including the second<br />

and third bifurcations above base, seen from the front. B'.<br />

Apex of branch from front, slightly inclined to one side<br />

to show lateral series of vents. Prom dry, somewhat<br />

macerated, specimen from Friday Island, Torres Straits.<br />

Nat. size.<br />

C. AmpJiilectus hisindidus. The greater part of the type (dry)<br />

specimen; the real base is on a shell (omitted) to the left.<br />

From Thursday Island, Torres Straits, 3-5 fms. Nat.<br />

size.<br />

D. Echinodictymn cancellatum. The lower part (about half of<br />

the whole) of the type (dry and macerated) specimen<br />

from Warrior Reef, Torres Straits. One third nat. size.<br />

,

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