Lapworth— Graptolites of Co. Down. 141 



73. Sp. 2. Dicranograptus Nichohoni. 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. 42s. (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, Vol. I. 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- 



lea, Craigavad, and Coalpit Bay. 



79. Sp. 2j Dicellograptus Forchammeri. Geinitz; PI. 7, fig. 7. Localities — 



Carnalea, Ballygrot, and Coalpit Bay. 



80. Sp. 3. Dicellograptus Moffalensis. Carr. PI. 7, fig. 9. Locality— 



Ballygrot. 



81. Var. (a) divaricatus. Hall. PI. 7, fig. 10. Locality— Ballygrot. 



82. Sp. 4. Ditellograptus caduceus. Lapw. PI. 7> %• 3- (Catl. Western 



Scottish Fossils. PI. 4, fig. 83.) 



Polypary consisting of two simple monoprionidian branches, which diverge 



