Barnacles from the Hull oj (he ' Terra Nova.^ 229 



Five examples, GO to 90 mm. long, three from Montevideo, 

 and two, troin Baliia Blanca, types o£ the species, kindly 

 lent to me for examination bj Mr. C Forster Cooper. 



Cliipea melanostoma. 



Pomotobus melanostomns, Eigenmaun, Proc. Washington Acad. viii. 

 1907, p. 452, pi. xxiii. tig. 6. 



Mouth foothle.'^s. Depth of body 3^ to 4 in the lengtli, 

 lengtli of liead 4^ to 5. Diameter of eye 3 to 3^ in lengtli 

 of head; maxillary exiending to below anterior margin or 

 anterior -|; of eye; 25 gill-rakers on lower part of anterior 

 arch. No grooves at free margin of scales ; about 42 scales 

 in a longitLidinal and 11 or 12 in a transverse seiies ; ventral 

 scutes strongly keeletl and acutely pointed, 17— 20 + 9-lU. 

 Dorsal 15-16; origin nearer to base of caudal than to end 

 of snout. Anal 17-20. Pel vies 7-rayed, inserted iu advance 

 of origin of dorsal. Vertebriie 43. 



Kio de la Plata. 



Eleven specimens, 65 to 80 mm. in total length. 



XVIII. — Barnacles from the Hull of the ' Ttrra Nova' : 

 a Aote. By L. A. Borradaile. 



When the 'Terra Nova,' with the Briti.-li Antarctic Expe- 

 dition on board, was at Lytteltun, New Zealand, in I'JIO, 

 barnacles weie removed from her bottom. Some of these 

 were included in the collection of Cirripedes taken by the 

 Expedition, upon which I have recently repoited (Brit, 

 Antarct. (' Terra Nova ') Exped. 1910, Zool. iii. p. 127, 1916). 

 Others came into the possession of the Ota go Museum, and 

 are mentioned by Mr. Jennings in an article on the Pedun- 

 culate Cirripedia of New Zealand, j)ublished in 1915 in the 

 ' Transactions of the New Zealand Institute ' (xlvii. p. 2b5). 

 Unfoitunately, at the time of writing my report I had not 

 Mr. Jennings's work before me, and there are consequently 

 between our papers certain discrepancies. The object of 

 the present note is to call attention to and explain these, as 

 follows : — 



1. My Lepas affinis is Mr. Jennings's L. analifera, var. c. 

 If I had seen Mr. Jennings's description of this foini, I 

 should still have thought it advisable to name it as I did, 

 because in my view it is as nearly related to L. hilli as 

 to L. anatfera, and all three forms are of the same rank, 



