ANNULATA.| UPPER PALAZOZOIC ARTICULATA. 18] 
Srot. VI—ARTICULATA OF UPPER PALASOZOIC ROCKS (Carboniferous and Permian). 
Sub-kingdom. ARTICULATA. See page 127. 
Class) ANNULATA. See page 127. 
Order. Tusicota. See page 131. 
Tribe. AMPHITRITA. See page 132. 
Genus. SERPULITES. See page 132. 
SERPULITES CARBONARIUS (J/°Coy). 
Reef —M°Coy, Synop. Carb. Foss. Ireland, t. 23. f. 32. 
Sp. Ch.—Tubes small, averaging one and half to three lines in width, thin, shelly, very glossy, lateral 
thickened ridges strong ; length unknown (upwards of five inches). 
This species is intermediate between the S. longissimus (Sow.), and the S. membranaceus (M*Coy), in 
the texture of its tube, being more delicate than the former and more shelly than the latter; it is, however, 
greatly inferior to either of them in size. 
Position and Locality—Not uncommon in the black limestone beds of Derbyshire; the original Irish 
locality was the Calp of Manor Hamilton. 
Class. CRUSTACEA. See page 133. 
Order. Enromostraca. See page 134. 
Tribe. PHYLLOPODA. See page 134. 
Family. APODIAD. See page 134. 
Genus. Dituyrocaris (Scoul. MSS.) 
Gen. Char.—Carapace semioval, the two sides meeting along the middle at a very obtuse angle ; anterior 
énd rounded, often with an obscure notch in front; posterior end subtruncate, with the lateral angles pro- 
duced backwards into short, flat, angular spines; surface faintly marked with irregular imbricating strive, 
the margins being usually thickened and corrugated, and with three well-marked longitudinal ridges, one in 
