Cmi/rox. — Crust iu'ca of the Kevmruh'c Ixhnich. 511 



Metoponorthus pruinosus (Brandt). 



Porcellio pruinosus Brandt, Conspectus Oniscidornm, pp. 181 (19), 188 (26), 

 1833. Metoponorthus ))ruinosus Budde-Lund, Crust. Isop. Terrt\st., 

 p. 169, 1885: Chilton, Ann. Mag. Nat. Hist., ser. 7, 16, p. 428, 

 1905 ; and Trans. N.Z. Inst., 38, pp. 64, 65, 1906 : Stebbing, Ann. 

 Soutli African Mus., 6, p. 440, 1910. 



Numoroiis specimens found under logs, stones, &c., at Denhani Bay, 

 Sunday Island. 



Mr. Oliver says of these specimens, " Perhaps introduced," and tliey 

 certainly belong to this European species, which has now been distributed 

 to most of the temperate regions. I have already discussed its occurrence 

 in Norfolk Island and New Zealand in the papers quoted above. 



Subclass CIRKIPEDIA. 



Order THORACICA. 

 Lepas pectinata Spengler. 



Lepas pectinata Darwin, Cirripedia (Lepadidae), p. 85, pi. 1, fig. 3, 1851 ; 

 Hutton. Trans, N.Z. Inst., 11, p. 329, 1879; Gruvel, Cirrhipedes, 

 p. 107, fig. 119, 1905. 



Numerous specimens from Sunday Island ; some on Spirula shells. 

 They agree well with Darwin's description. 



The species is very widely distributed, and was recorded from Auckland, 

 New Zealand, by Hutton in 1879. 



Lepas denticulata Gruvel. 

 Lepas denticulata Gruvel, Cirrhipedes, p. 107, fig. 118, 1905. 



A few small specimens collected at Sunday Island by Captain Bollons 

 in 1907 appear to belong to this species. 



They agree well with the figure given by Gruvel, dift'ering from L. pectin- 

 ata in having the ridge on the scuta from the umbo to the apex situated 

 some distance from the convex occludent margin ; the carina is dorsally 

 crested, and bears 4 or 5 well-marked teeth, but I cannot make out the 

 projecting points on the two branches of the inferior fork, nor is the tooth 

 on the internal umbonal angle of the left scutum distinguishable. 



Gruvel's specimens are from the Philippines. 



Lepas anatifera Linnaeus. 



Lepas anatifera Darwin, Cirripedia (Lepadidae), p. 73, pi. 1, fig. 1, 1851 ; 

 Gruvel, Cirrhipedes, p. 103, fig. 121, 1905 ; Stebbing, Ann. South 

 African Mus., 6, p. 563, 1910. 



Numerous specimens which I refer to this species were obtained from 

 Sunday Island. 



These specimens can be separated pretty easily into three varieties. 

 A few of them agree pretty closely with the type of this species as described 

 by Darwin : in them the valves are almost smooth, the radiating lines 

 not being prominent ; the carina is rather narrow and fairly acuminate 

 at the end. Many other specimens have the carina more or less distinctly 

 barbed, and agree well with Darwin's " var. {h) " ; in these the radiating 



