Jennings. — Revision of the Girri/pedia of New Zealand. 61 



Beach (L. S. Jennings) ; Wanganui (S. H. Drew) ; Chatham Islands (Dr. E. 

 Kershner) ; Auckland Islands (C. Chilton). 



Bv the " Nora Niven " Trawling Expedition this species was taken at 

 several localities on the New Zealand coast, many of them growing on the 

 carapace of Paramithrax longicornis Thomson, with which crab the cirripede 

 seems to be specially associated. 



Balanus trigonus Darwin. 



Balanus trigonus Darwin, 1854, p. 223, pi. 3, tigs. ~<i-lf Hutton, 

 1879, p. 330 ; Gruvel, 1905, p. 223, figs. 248, 249 : Pilsbry, 1916, 

 p. Ill, pi. 26, figs. l-13e. 



Specific Diagnosis.-- " Parietes ribbed, mottled purplish - red ; orifice 

 broad, trigonal, hardly toothed. Scutum thick, with from one to six longi- 

 tudinal rows of little pits. Tergum without a longitudinal furrow ; spur 

 truncated, fully one-third of width of valve.*' (Darwin.) 



Locality. — Rangitoto Reef, Auckland Harbour (W. R. B. Oliver). 



Balanus porcatus Da Costa.* 



Balanus porcatus Da Costa, 1778, Hist. Nat. Test. Brit., p. 249 ; 

 Darwin, 1854, p. 256, pi. 6, figs. 4«-4e ; Filhol, 1885, p. 487 ; 

 Gruvel, 1905, p. 237, fig. 264. Balanus balanus Pilsbry, 1916, 

 p. 149. 



Specific Diagnosis. — "Shell white, generally sharply ribbed longi- 

 tudinally : radii with their summits almost parallel to the basis. Scutum 

 longitudinally striated : tergum with the apex produced and purple." 

 (Darwin.) 



Localities. — Auckland (H. Suter) ; New Zealand (localitv not stated) 

 (W. R. B. Oliver). 



Balanus crenatus Bruguiere. 



Belanus crenatus Bruguiere, 1789, Encyclop. method, (des Vers), p. 168 ; 

 Darwin, 1854, p. 261, pi. vi, figs. 6a-6g ; Gruvel, 1905, p. 240, 

 figs. 268, 269 ; Pilsbry, 1916, p. 165, pis. 39, 40. 



Specific Diagnosis. — " Shell white : radii with their oblique summits 

 rough and straight. Scutum without an adductor ridge : tergum with spur 

 rounded." (Darwin.) 



Localities. — Hull of " Terra Nova," Lyttelton Harbour (C. Chilton). 



Pilsbry (1916) distinguishes several varieties of this species. 



Tetraclita purpurascens (Wood). 



Lepas purpurascens Wood, 1815, General Conchology, p. 55, pi. 9, 

 fig. 42. Tetraclita purpurascens Darwin, 1854, p. 337, pi. xi, 

 figs. la-Id ; Hutton, 1879, p. 328 ; Gruvel, 1905, p. 285, fig. 308« ; 

 Pilsbry, 1916, p. 249. 



Specific Diagnosis. — " Shell depressed, pale purple or dirty-white, with 

 the surface longitudinally ribbed, or corroded and granulated : radii or even 

 sutures none, or radii well developed and broad, with summits parallel to 



* According to the rules of priority, this species should be named Balanus balanus 

 (Linnaeus), the name adopted by Pilsbry in 1916. For convenience of reference to papers 

 dealing with New Zealand Cirripedia the name used by Jennings in his manuscript 

 notes has been allowed to stand in the text. — 0. C. 



