30 BRITISH PALAEOZOIC PHYLLOCARIDA. 



Ludlow. Ludlow Museum A, marked " G. leiitodactylus, Marston Coll." This 

 is figured in La Touche's ' Handbook Greol. Shropshire,' 1884, pi. 17, fig. 566. 



C. Halliana. — Carapace. — Long, sub-triangular, pyriform. 



Body-segments. — With straight striae. 



Caudal appendages. — Delicately ridged ; style pitted. 



7. Ceratiocaeis Pardoeaka, La Touche, 1884. PI. V, figs. 1 and 2. 



1884. Ceeatiocaeis Paedoensis (part), La Touche. Handbook to the Geology 



of Shropshire, p. 77, 

 pi. 17, fig. 563. 



1885. Ceeatiocaeis MrECHisoNi (part), T. B. J. Sf S. W. Third Eeport, Pal. 



Phyll., p. 337; Geol. Mag., 1885, 

 p. 888. 



1886. — Paedoean A, T. B. J. ^ S. W. Fourth Eeport, p. 230 ; 



Geol. Mag., 1886, p. 457. 



Two carapaces with segments and parts of appendages from Ludlow (Ludlow 

 Mus. B and D) differ from any other form. One of them (B), with a wrong caudal 

 appendage (PI. V, fig. 3, p. 19) attached to it, in the Ludlow Museum, has been 

 labelled " G. Pardoensis," and as such is referred to in the Rev. J. D. La Touche's 

 ' Handbook to the Geology of Shropshire.' We retain this name (altering the 

 termination, as it refers to a person, and not a place) for the two carapaces here 

 referred to. One of them (B) is of special interest as having its rostrum nearly in 

 place (PI. V, fig. 1). 



In specimen D of the Ludlow Museum (PI. V, fig. 2), which has the proximal 

 portion only of the caudal spines preserved, and in specimen B, with the appen- 

 dages also broken off short, the telson was ribbed and pitted (= prickly). 



Carapace subovate, broad, and short; smooth (?), pitted (fringed) on ventral 

 rim ; pointed medially in front ; truncate with ogee curve behind. Rostrum present 

 in PL V, fig. 1. Segments, six, exposed. Ultimate segment long; all delicately 

 wrinkled longitudinally. Style and stylets ridged ; the former pitted. 



PI. V, fig. 1. Carapace, five or six abdominal segments, and part of the caudal 

 spines. The right valve lies outwards, showing part of the moulded matrix 

 between the valves and some relics of indistinguishable body-substance. Four 

 segments preserve their shape (compressed) and test ; and are continued inwards 

 with indications of three others within the carapace. The intestinal tube is 

 traceable from the posterior margin of the carapace to the lower angle of the 

 ultimate segment. Longitudinal, sinuous, anastomosing wrinklets ornament the 



I 



