Victorian Fossils, Fart X. 109 



ocular spot be demonstrable in this form it ^YOllld require to be 

 removed to the genus Emmelozoe ; but this genus, by the way, 

 has hitherto furnished no evidence of appendages to the cara- 

 pace. 



Ceratiocaris cf. PARDOEA>'A, J. and W. (Plate XXVIIT., fig. 6). 



C. ('■ pardoensis ") pardoeana. La Touche (nom. emend. 

 T.R.J, and H.W.), Jones and Woodward, 1888, Mon. Brit. Pal. 

 Phyll., pt. i., p. 30. pi. v., figs. 1. 2. 



Description. — An imperfect example of a carapace, wanting 

 the anterior region, and with two abdominal segments, occurs 

 in the mudstone of South Yarra. It is closely allied to the 

 above species, if not identical with it. The dorsal margin is 

 nearly straight, with not quite the decided curvature of C. 

 pardoeana ; the ventral margin is truncated anteriorly, and 

 sharply rounded posteriorly. There is a large amount of varia- 

 tion in the English examples of C . pardoeana from the Lower 

 Ludlow, which helps to make our comparison better founded. 

 The two abdominal segments, as in C . pardoeana. are broad and 

 short. 



Diinensions. — Approximate length of carapace when complete, 

 28 mm. Greatest height, 19 mm. Height of first abdominal 

 segment, cir. 14 mm. ; length, 5 mm. 



Occurrence. — Silurian (Melbournian). In bluish mudstone ; 

 South Yarra. Coll. by F. P. Spry. 



Genus — Xiphidiocaris, J. M. Clarke. 



Note. — The phyllocarid genus Xiphocaris ^^■as published by 

 Prof. Rupert Jones and Dr. H. Woodward in 1886. The name 

 was preoccupied, however, by a genus of the Palaemonidae 

 (prawns), published by Martens in 1872. In Zittel's Text Book 

 of Palaeontology (Engl., ed. by Eastman, 1900), at p. 655, 

 Prof. J. M. Clarke makes the following reference : — *' Xipkidio- 

 caris. Jones and Woodw. (emend.).'" The altered name must 

 therefore stand as above. 



