NO. 1 HARTMAN : POLYCHAETOUS ANNELIDS 53 



2. D. amoena Kinberg (1865, p. 559) from the La Plata region, Ar- 

 gentina. (This also is known only through a brief, original account.) 



3. D. brasiliensis Kinberg (1865, p. 559) from Rio de Janeiro, Brazil. 

 (Anterior hooded hooks are distally tridentate ; hence it differs from 

 D. cuprea, contrary to Augener's (1934, p. 139) suggestion.) 



4. D. chiliensis Quatrefages (1865, p. 342) from Chile, p. 60. 



5. D. cuprea (Bosc) (1802, p. 142) from South Carolina, p. 54. 



6. D. dentata Kinberg (1865, p. 560), first described from Sidney, 

 Australia, recently reported from Pacific Panama, by Monro (1933, 

 p. 73) ; but see D. ornata, below. 



7. D. longicornis Kinberg (1865, p. 560) from Rio de Janeiro, Brazil. 



8. D. ornata Moore (1911, p. 273) from California, p. 55. 



9. D.rhizophorae Grube (1856, p. 54) from Realejo, Nicaragua. (This 

 is known only through a brief, original account.) 



10. D. splendidissima Kinberg (1865, p. 560) from Ecuador, p. 56. 



11. D. viridis Kinberg (1865, p. 559) from the La Plata region, Argen- 

 tina. 



The collections of the Velero III include 6 well-defined species of 

 Dtopatra; for comparison there are also specimens of D. cuprea (Bosc) 

 from North Carolina. Three are believed to be new to science. These 6 

 species are : 



1. D. cuprea (Bosc), p. 54. 



2. D. ornata Moore, p. 55. 



3. D. splendidissima Kinberg, p. 56. 



4. D. obliqua, new species, p. 57. 



5. D. tridentata, new species, p. 61. 



6. D. neotridens, new species, p. 63. 



Key to Species of Diopatra 



1. Anterior hooded hooks distally tridentate (pi. 2, fig. 42) ; tube 

 smooth, annulate (pi. 2, fig. 41) . . . D. tridentata, p. 61 



1. Anterior hooded hooks include both bidentate and tridentate . 

 D. neotridens, p. 63 



1. Anterior hooded hooks distally bidentate (pi. 2, fig. 26) . . 2 



2. Pectinate setae distally conspicuously oblique, provided with 

 many long, slender dentations (pi. 2, fig. 24) D. obliqua, p. 57 



2. Pectinate setae distally straight or nearly so 3 



3. Pectinate setae with relatively few large teeth (pi. 1, fig. 22) 

 D. splendidissi?na, p. 56 



