20 
yit is only found at certain seasons*. It is a very re- 
marcable fact how common certain species of marine- 
shells appear at certain localities for a lenght of time 
and thereafter disappear for many years; perhaps some 
species, which are living in the deepest parts of the sea, 
come, at certain seasons, to the shores to breed; Rvd. 
Ziock has at least once found 6 or 8 full-grown life 
specimens of Turbinella ananas Chem. on one to two 
feet water, close to the shore; Reeve says that the Tur- 
binella ananas Chem. lives in deep water and we have 
never found it close to the shore, thaugh we in 17 years 
have made excursions around the W. Ind-JIslands; we 
have likewise once found several specimens of Murex 
hexagonus Lmk. in one place close to the shore and 
since than not found it for many years. 
. elongatus Lmk. station: — ? —; habitat: Gulf 
of Mexico; Reeve! remark: Perhaps a variety of 
Murex cornu-cervi Mart; Reeve makes the same mistake 
by the drawing of this species as by Nr. 5, 13, 14, 
20, 23, 24, 25 and many more in the Ic. conch. in re- 
presenting young specimens, where the characteristic 
enameled lip is not yet eveloped. 
funiculatus Reeve. station: on stones in one or 
two feet water in the creeks around Carthagena; habi- 
tat: Jamaica; C. B. Adams! Carthagena in New-Gra- 
nada; Krebs! 
. hexagonus Lmk. station: young specimens found at 
St. Thomas between pieces of corals and stones on 1 to 
2 feet water; habitat: Antillae; Morch! Guadeloupe ; 
Beau! St. Thomas; St. Johns; Jamaica; C. B. Adams! 
St. Thomas; Tortola; Krebs! remark: we found this 
shell quite commonly at the shores of St. Thomas in 
