10 
Vincent; Guilding! St. Thomas (?); Krebs! Guadeloupe; 
Beau! 
harpula Val. station: — ? —; habitat: New- 
Holland; Kien! Antillae; Moérch! St. Thomas; R. Swift! 
John Knox! St. Croir; Krebs! remark: stands very 
near Pl. fuscescens and Pl. nigrescens Gray and is per- 
haps synonyme. 
hastula Reeve. station: —- ? — ; habitat: St. 
Thomas; Krebs! 
Jayana Ad. station: — ? —; habitat: Jamaica; 
C. B. Ad.! St. Thomas; Krebs! remark: a very doubtful 
species, likely synonyme with. Pl. zebra Kiener! 
Lavelleana dOrb., pt. 2 pg. 174 pl. 24 fig. 7, 9. 
station: — ? —; habitat: Cuba; Jamaica; Guade- 
lonpe; Martinique; d’Orb.! Guadeloupe; Beau! 
lagueata Reeve. station: in very deep water dOrb.! 
habitat: West-Indies; d’Orb.! 
luctuosa dOrb. station: —? —; habitat: Cuba; 
d’Orb.! pt. 2 pg. 172 pl. 23, fig. 29—31. Guadeloupe; 
Beau! 
maculata Ad. station: — ? ; habitat: St. Thomas; 
and Jamaica; C. B. Ad.! 
minor Ad. station: — ? — ; habitat: Jamaica; 
C. B. Ad.! 
monilifera Sowb. station: — ? —; habitat: Ja- 
maica; C. B. Ad.! 
nigrescens Ad. station: — ? — ; habitat: Ja~ 
maica; C. B. Ad.! remark: is this and the P. semi- 
granosa Reeve not synonyme ? 
nigrescens Gray. station: under flat pieces of 
madrepores in 1 to 2 feet water; habitat: St. Vincent; 
Guilding! Guadeloupe; Beau! St. Thomas; St. Croix; 
