72 
ENCRINURUS SEEBACHI, Schmidt, Obsbal. Sil. Tril., p. 229, Plate XIV, 
figs. 16-26; Plate XV, figs. 21-23. 
The author illustrates the entire species in parts from Wesenberger. 
The genal angles of the head are produced into long spines, almost 
to the last segment of the thorax, as in #2. vigz/ans, Hall. The glab- 
ella and cheeks coarsely granulated. 
Thorax with 11 segments. ‘The axis has a spine on the 7th, 9th, 
roth and 1rth joints. 
Pygidium triangular in shape. Axis 30-32, axial joints extending 
across it. No nodes. Pleurae g; not tuberculated. 
Hypostoma the same as that of E. punctatus. 
ENCRINURUS MULTI-SEGMENTATUS, Portlock. 
Amphion multi-segmentatus, Port., Geol. Rep. of Londonderry, p. 291, plate 3, 
fig. 6 a-b. 
Ampyx? baccatus, Port., Geol. Rep. of Londonderry, p. 262, plate 3, fig. 11. 
Encrinurus multi-segmentatus, Salt., Mem. Geol. Sur., Dec. 7, Encrinurus, p. 7. 
—Nieszk., Mong. Tril. Ostseeprov., p. 609 (ex. pt.) 
—Schmidt, Untersuch Sil. Form. Erkl., p. 190 (ex. pt.) 
Roemer, Foss. Fauna V. Sandewitz, p. 75, plate 8, figs. 7, a, b, c. 
Cryptonymus multi-segmentatus, Vogdes, Mong. genera Zethus, p. 29. 
Mnerinurus multi-segmentatus, Schmidt, Ostbal. Sil. Tril, p. 227, plate 14, figs. 
14-15; plate 15, figs. 19-20. 
—Torngq,., Sv. Geol. Under., Ser. C, No. 66, p. 24, plate 1, figs. 18-19. 
—Roemer, Lethaea erratica, plate 4, figs. 14, a. 
The author figures the pygidium (plate 3, figs. 6-a, b) and the head 
as Ampyx baccatus, plate 3, fig. rr. 
The following is the original description: 
Characters: ‘‘ Axial segments very narrow and numerous, 28 being enu- 
merated as far as the last side segment, and still continuing through very 
niinute, to the very apex. <A small, lozenge-shaped caudal plate. Side seg- 
ments, 12 on each side, exclusive of the false segment. They are rounded and 
slightly bent or raised at their extremities; no punctures or marks of any kind.” 
Dr. Roemer Foss., Fauna von Sadewitz, p. 75, plate 8, figs. 7, a, b, 
c, illustrates a head and tail, which he refers to this species; fig. 7-a of 
the head has the genal angles prolonged into short spines; fig. 7-c of the 
tail, exhibits side notches on the axis and a smooth centre; no orna- 
mentations 
The same author referred Lncrinurus striatus, Ang., to this species 
as a synonym. 
The Irish species will easily be distinguished by its large, coarsely 
tuberculated head and many ribbed tail. ‘The crest of large tubercles on 
the glabella are parted in the middle along the front of the glabella. 
