THORACIC CIRRIPEDES COLLECTED IN 1925-1936 237 



Balanus maxillaris Gronovius, 1763. 



For synonymy see Nilsson-Cantell, 1930, Discovery Reports, 11, p. 254. 



St. WS 124. 9. vi. 27. Gough Island, Penguin Island anchorage, 40° 16' 00" S, 9° 58' 00" W. 

 40-60 m. Gear DLH. Some shell fragments. 



St. WS834. 2. ii. 32. 52° 57' 45" S, 68" 08' 15" W. 27-38 m., d.b.gy.st. m. s. Gear OTC. 

 Several full-grown specimens. 



St. WS836. 3.ii. 32. 53° 05' 30" S, 67° 38' 00" W. 64 m. Gear BTS. Some full-grown 

 specimens. 



Distribution. South Africa: Cape of Good Hope, Cape Town, Algoa Bay, South 

 Atlantic: Gough Island. 



Supplementary description. The Discovery material previously examined 

 (Nilsson-Cantell, 1930) contained only young specimens of this species. Since the 

 specimens here dealt with are full-grown, I will give figures and a description of internal 

 parts not previously studied. 



Balanus laevis Bruguiere, 1789. 



For synonymy see Nilsson-Cantell, 1921, Zool. Bidrag Uppsala, vn, p. 321. 



St. WS 249. 20. vii. 28. 52° 10' 00" S, 57° 30' 00" W. 166 m., f.br.gn.s. sh. st. Gear DLH. 

 Three small specimens on wood. 



St. WS583. 2. V. 31. 53° 39' 00" S, 70° 54' 30" W. 14-78 m., s. St. Gear BTS. Several 

 specimens on stones. 



Distribution. California, Chile, Peru, Tierra del Fuego, Magellan Strait, Falkland 

 Islands, South Argentina and South Brazil, South Sandwich Islands, Chinca Islands. 

 From the tidal zone down to 275 m. (Nilsson-Cantell, 1921). The species is found on 

 stones, shells, tubes, wood and according to Darwin also on Balanus psittacus (Molina, 

 1892), Darwin, 1854. 



Discussion. To the description previously given of this species nothing need be 

 added here. 



Genus Coronula Lamarck, 1802 



Coronula diadema (Linne, 1767). 



For synonymy see Nilsson-Cantell, 1921, Zool. Bidrag Uppsala, vii, p. 371. 



26. xii. 34. 57° 20' 00" S, 32° 00' 00" W. From a Humpback whale. Three specimens with 

 Conchoderma auritum. Taken by S.S. 'Sourabaya'. 



1934-35. South Atlantic. From a Blue whale. Two large specimens with Conchoderma auritum. 



Distribution. Probably cosmopolitan. The species is not yet known to occur uni- 

 versally in the oceans. No examples are known from the equatorial parts of the Atlantic 

 Ocean. From the Indian Ocean a fragment of the wall is taken north of Zanzibar from 

 a depth of 818 m. (Weltner, 1922). 



Supplementary description. In my earlier paper on the Discovery material I noted 

 a specimen with a carino-rostral diameter of 53 mm. and a height of 42 mm. The largest 



