| Stenostomum grande Child, 1902 | between May and Aug 1907 |  |  | in great quantities, in brackish pool. | 
| Stenostomum coluber Leydig, 1854 | Aug 1907 |  |  | Prof Child and Dr. Wilhelmi had collected this in brackish ponds with Triclads. | 
| Macrostomum sensitivum Silliman, 1884 | between May and Aug 1907 |  |  |  | 
| Prorhynchus stagnalis Schultze, 1851 | between May and Aug 1907 |  |  | under rocks | 
| Dalyellia rossi Graff, 1911 | between May and Aug 1907 |  |  | found behind the Episcopal Church in brackish water. | 
| Dalyellia mohicana Graff, 1911 | between May and Aug 1907 |  |  | two specimens found behind the Episcopal Church. | 
| Phagocata woodworthi Hyman, 1937 | 1901 or earlier |  |  |  | 
| Phagocata woodworthi Hyman, 1937 | 1904 or earlier |  |  |  | 
| Phagocata woodworthi Hyman, 1937 | 1906 or earlier |  |  |  | 
| Phagocata woodworthi Hyman, 1937 | 1907 or earlier |  |  |  | 
| Phagocata woodworthi Hyman, 1937 | 1908 or earlier |  |  |  | 
| Phagocata woodworthi Hyman, 1937 | 1909 or earlier |  |  |  | 
| Phagocata woodworthi Hyman, 1937 | 1931 or earlier |  |  |  | 
| Euplanaria tigrina (Girard, 1850) | 1937 or earlier |  |  | Pond south of Main Street, behind the Episcopal Church, Falmouth, Massachusetts. |