Lapworth— GraptoLites of Co. Down. 141 
73. Sp. 2. Dicranograptus Nicholsoni. Hopk. PI. 7, fig. 2. Locality — 
Ballygrot. 
74. Sp, 3. Dicranograptus formosus. Hopk. PI. 6, fig. 41. Localities— 
Coalpit Bay and Craigavad. 
75. Sp. 4. Dicranograptus Clingani. Carr. PI. 6, fig. 43. Locality— Not 
yet detected in Ireland. 
76. Sp. 5. Dicranograptus ziczac , Lapw. PI. 6, fig. 420. (Catl. Western 
Scottish Fossils. Plate 3, fig. 77.) 
Stem one-eighth of an inch in length, pointed ; branches diverging at an 
angle of about 120 degrees, about an inch in length, bent into an elegant double 
curve, and forming a polypary of a vase-like form. Hydrothecse 28 to 30 to the 
inch, seen in profile on the stem ; invisible upon the branches. Allied to Di- 
cranograptus furcatus of Hall. (Pal. New York, Yol. L Plate 74, fig. 4. ) 
Locality — Unknown in Ireland. 
77. Var. minimus. Lapw. PI. 6, fig. 42^. 
Branches half an inch in length, forming a single gentle curve. Locality — 
Coalpit Bay, 
Genus XII. Dicellograptus. Hopkinson. (Geol. Mag. 1871. PI. 1, p. 20.) 
78. Sp. 1. Dicellograptus elegans. Carr. PI. 7, fig. 8. Localities — Carna- 
Iea, Craigavad, and Coalpit Bay. 
79 * Sp. 2; Dicellograptus Forchammeri. Geinitzj PI. 7, fig. 7. Localities — 
Carnalea, Ballygrot, and Coalpit Bay. 
80. Sp. 3. Dicellograptus Moffatensis . Carr. PI. 7, fig. 9. ’Locality — 
Ballygrot. 
81. Var. (a) divaricatus. Hall. PI. 7, fig. 10. Locality — Ballygrot. 
82. Sp. 4. Dicellograptus caduceus . Lapw. PI. 7, fig. 3. (Catl. Western 
Scottish Fossils. PI. 4, fig. 83.) 
Polypary consisting of two simple monoprionidian branches, which diverge 
