228 



DISCOVERY REPORTS 

 Bathymetrical distribution 



in modern works, and have given figures and descriptions of as many young and old stages 

 as possible for the same species. If this is done for many species it will be much easier to 

 determine new finds of Cirripedes. During my studies of the difi'erent stages I have 

 found the actual form of the plates to be very difi'erent during development. It seems 

 to me very questionable if all species described in the literature, especially of Scalpellum, 

 are good species. In many cases they have been found to represent only different stages 

 of growth of the same species. Though many species in the collection were previously 

 known, they are not all well known. Scalpellum africamim, Hoek, 1883, S. convexum, 

 Nilsson-Cantell, 1921, and Hexelasma corolliforme (Hoek, 1883) have not before this 

 been recaptured since the original descriptions were given. The systematic part, which 

 here follows, contains, besides actual systematic data, biological and embryological 

 details of interest. 



SYSTEMATIC 



Genus Scalpellum, Leach, 1817 



Scalpellum gibberum, C. W. Aurivillius, 1892. 



For synonymy see Nilsson-Cantell, 1921, Zool. Bidrag Uppsala, vn, p. 178. 



St. 48. 3.V. 26. Port William, Falkland Islands. 105-1 15 m., s. sh. GearOTL. Three very young 

 specimens. 



St. 51. 4. V. 26. Off Eddystone Rock, East Falkland Island. 105-115 m., f.s. GearOTL. Many 

 specimens on the decapod Eurypodius latreillei; one small specimen on a Hydroid. 



St. WS 73. 6. iii. 27. 51° 01' 00" S, 58° 54' 00" W. 121-130 m., f.d.s. Gear OTC. Some large 

 and small specimens on a Tiibidaria colony. Gear N 7-T. One full-grown specimen on a Hydroid. 



St. WS 79. 13. iii. 27. 51° 01' 30" S, 64° 59' 30" W. 132-131 m., f.d.s. Gear OTC. Some large 

 and small specimens on Molgulids, which occurred in large numbers in the catch. 



