356 REPORT—1885. 
1868. Lurypterus leptonotus, Barr. Bigsby, ‘ Thes. Silur.’ p. 199. 
1872. C. docens, Barr. ‘Syst. Sil. Bohéme,’ vol. i. Suppl. p. 450, pl. 21, figs. 32-35. 
Seven segments, all somewhat displaced and those at the ends broken, 
about 80 mm. long altogether. Some are abont 20 mm. high. Longi- 
tudinal ornament of delicate, interrupted, wrinkly, raised lines of two 
sizes (fig. 35). This belongs to Barrande’s Silurian Stage! H e 2. 
(2.) CERATIOCARIS DECIPIENS, Barrande. 
1865. Hurypterus, sp. Barr. ‘ Déf. des Col.’ vol. iii. p. 235. 
1872. OC. decipiens, Barr. ‘8.8. BY vol. i. Suppl. p. 449, pl. 21, figs. 36-38. 
Three of the distal segments ; the ultimate (longest) broken. Alto- 
gether about 35mm. Much smaller than C. docens, stout-looking, sub- 
cylindrical or sub-quadrate in cross-section. The ornament is longitudinal, 
consisting of delicate, wrinkly, raised lines, in fascicules radiating back- 
wards (upwards), fig. 38. This belongs to Stage Hel. This fossil is 
so very similar to a Bactropus that it will probably be found to belong to 
one of the Phyllopods allied to Aristozoe. See further on, page 359. 
(8.) Cxratiocaris Scuaryi, Barrande. 
1872. CO. Scharyi, Barr. ‘8.58. B.’ vol. i. Suppl. p. 454, pl. 32, figs. 24-29. 
1876. C. Scharyi, F. Roem. ‘Leth. geogn,’ Th. i. ‘ Leth. pal.” Expl. pl. 19, fig. 6. 
Seven segments (75 mm., ultimate segment 23 mm.). Height of the 
highest (sixth from the end), 20 mm.; height at the end of the ultimate 
segmert, 10 mm. Proximal portion of the trifid appendage attached im 
place. Ornamented with a delicate imbrication of raised, leaf-shaped 
lines, like pointed arches, with a minute tracery of smaller leaf-like 
pattern within them: all pointing backwards (fig. 27). The same on the 
basal portion of the telson also. The ornament has some resemblance to 
the pattern on Hurypterus. It occurs also on C. Deweti, Hall, and on some 
British forms. This species belongs to Stage Ee 1. 
(4.) Crratiocaris Bonemica, Barrande. 
1853. Ceratiocaris (Leptocheles) Bohemicus, Barr. ‘Neues Jahrb. fir Min,’ &c. 1853. 
Heft iii. p. 342. 
1868. Ceratiocaris Bohemicus, Barr. Bigsby, ‘ Thesaur. Silur.’ p. 199. 
1872. C. Bohemicus, Barr. ‘Syst. Sil. Boheme,’ vol. i. Suppl. p. 447, pl. 19, figs. 1-13. 
Ultimate segment (fig. 1), 50 mm. long; with linear longitudinal 
ornament of interrupted raised lines. Telson ridged, and pitted (= spin- 
ose) along two channels on the back; linear ornament (as above) on 
the base; fragment 130 mm. Stylets (one perfect, 80 mm.), ridged. 
Near to C. Murchisoni. Several specimens of telsons and stylets are 
in the Brit. Mus., some marked ‘44878,’ ‘44428,’ and ‘44383,’ and 
some not numbered. This species belongs to Barrande’s Stage EH e 2. 
1 Barrande’s ‘ Stages’ are— 
He hid, 2 
Giada. Shares - g il, 2, snut = Passage-beds, Ludlow, Wenlock, and 
=; Pind Oy) Llandovery . 
H,e1, 2 
Second Fauna.— Stages D,d1, 2, 3,4, 5) =Bala-Caradoc, Llandeilo, Lingula- 
Primordial Fauna,—Stages C,c1 } flags, and Menevian. 
Azoic ; 3 - é ie 2 ; } = Precambrian, &c. 
