Lae} 
ae} 
127 
. hirtus Phil. habitat: Cumana; Philippi Zeitsch. 1846 
pg. 191! Isl. of Margaritha; Swift! West-Indies; Krebs! 
. minimus Gml. habitat: St. Thomas; Riise! remark: 
the name derives from Mérch but the specimens are by 
us considered the young of P. pectinatus Gm. 
oculatus Reeve. spec, 38 (P. pectiniformis Lmk. ace. 
to d’Orbigny) habitat: West-Indies; Reeve! Tortola; 
Swift! Krebs! Martinique; dOrb.! Guadeloupe; Beau pg. 
22! remark: Reeve'’s description does not satify us. 
. pectenoides Desh. habitat: Tortola Swift! 
. pectinatus Gml. (Arca Gmel., A. costata Meusch., A. 
pectunculus minor Ch., P. minor dOrb.) habitat: Isl. 
la Plata; Reeve! St. Thomas; Riise! Krebs! Tortola; 
Carthagena (by Krebs); Ad.! Guadeloupe; Beau pg. 22! 
Tortola; Swift! Krebs! remark: Riise has dOrb.’s name 
from Moérch. 
. scriptus Lmk. habitat: St. Domingo; Lmk. 
. sericatus Reeve spec. 49; habitat: Tortola; Reeve! 
Swift! Krebs! St. Thomas; Krebs! St. Johns; Ad.! Gua- 
deloupe ; Beau pg. 22! 
. spadiceus Reeve. habitat: — ? — ; Reeve! St. 
Juan del Norte de Nicaragua; Krebs! 
. undatus L. (P. undulatus Lmk. spec. 3, P. lineatus 
Reeve fide Morch pg. 42) habitat: Virgin-Isl.; Swift! 
St. Thomas; Tortola; Krebs! Guadeloupe; Beau pg. 22! 
. spec. ind No 4. habitat: Riise has 2 specimens from 
Crabisland; Krebs has one valve from St. Martin; re- 
mark: it is ineqvilatoral and approaching P. spadiceus, 
but mustly white with a few brown specks; diameter 
from 4 to 6 lines. 
spec. ind. No 2. habitat: Porto-Plata; St. Thomes; 
