194 
PALAEONTOLOGY OF NEW-YORK. 
of the plates near the base of the proboscis, though it is evident they are variable; but they 
soon become hexagonal, as described and represented in the figures. There will be little 
difficulty in recognizing any detached fragments of this species, when the figures have once 
been studied : even the joints of the arms and fingers possess a peculiar character, and the 
undulating or subangular surface of the plates above the second series is alone sufficient for 
recognition. 
PLATE XLIII. 
Fig. 1 a. An individual, natural size, partially imbedded in shale. The base of the proboscis is 
shown between the arms. The portion of an arm or fingers, seen in the centre of the 
figure, has no connexion with the plates directly below it, which belong to the 
proboscis. 
Fig. 1 b. Figure showing the structure of the cup, the commencement of the proboscis, and the 
arms. 
Figs. 1 c, d, e. Detached plates from the upper part of the cup of other individuals. 
Fig. 1 /. A portion of a branch near the lower part. 
Fig. 1 g. A similar fragment near the Extremity of the branches of the fingers. 
Fig. 1 i. A fragment of an arm somewhat unequally bifurcating,, but having surface aspect and 
structure like this species. 
Fig. 1 h. The end of the joint enlarged, showing the articulating rays extending only a short 
distance from the centre. 
Fig. 1 h. Several joints of the preceding enlarged. 
PLATE XLII. 
Fig. 7 a. A specimen of this species, with the arms broken off, but preserving a large portion 
of the long proboscis which is flattened. 
Fig. 7 b. A portion of the proboscis enlarged, showing the form and arrangement of the plates of 
which it is composed. 
Position and locality. In the shale at Lockport. 
