BUFFALO SOCIETY OF NATURAL SCIENCES
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| 151. S. (Drepanopterus) bembicoides | Wenlock shales and sandstones | Gutterford Burn, Pentland Hills, Scotland | Two incomplete specimens |
| 152. S. (Drepanopterus) lobatus | Wenlock shales and sandstones | Gutterford Burn, Pentland Hills, Scotland | One nearly complete individual, two or three fragments |
| 153. S. (Drepanopterus) longicaudatus | Kokomo waterlime | Kokomo, Indiana | Form not described |
| 154. S. (Drepanopterus) pentlandicus | Wenlock shales and sandstones | Gutterford Burn, Pentland Hills | Several nearly perfect and two fragmentary individuals |
| 155. S. (Tarsopterus) scoticus | Caldeonian Old Red Sandstone | Montroman Muir, near the Forfar and Montrose Pike, Forfarshire | One carapace and an almost entire individual |
| 156. S. sp. α Clarke and Ruedemann | Shales in Shawangunk grit | Otisville, New York | Two fragments of leg joints of uncertain specific relations |
| 157. S. sp. β Clarke and Ruedemann | Shales in Shawangunk grit | Otisville, New York | Terminal joints of leg |
| 158. S. sp. γ Clarke and Ruedemann | Shales in Shawangunk grit | Otisville, New York | Fragments of segment and of integument |
| 159. S. sp. δ Clarke and Ruedemann | Shales in Shawangunk grit | Otisville, New York |
