PLATE 2, 3, 4>. 
FIG. 11, 12, 13. 
HELMINTHOLITHUS Entrochites (annulatus) 
stipite articulis inaequalibus: ambitibus Isevibus, 
caput versus alteriie planis rotundatisque, ramis 
. S. p. 
The joints of the stipe in this species are unequal : the 
ambits smooth; towards the head or body alternately flat 
and convex. Near the base or lower extremity of the 
stipe, six, eight, or more, of the flat-edged joints, intervene 
between single ones, with a prominent and rounded form. 
Found with the other species. 
Fig. 11. A specimen of the upper part of the stipe, with 
the ambits of the smaller joints flat, those of the larger 
convex. 
12. Differs in having the larger joints flat, the smaller 
prominent. 
This last specimen appears to be only the remains of 
the arras or branches of the stem. 
13. The pully-shaped stipe this species forms when its 
outer coat is destroyed. 
