128 "TERRA NOVA" EXPEDITION. 



New Zealand : 



Smilium spinosum, Ann., 1911. 

 Lepas pectinata, Spengler, 1793. 

 Lepas testudinata, Aur., 1894. 



Conchoderma auritum (L.), 1767. 

 Balanus amp>kitrite , Darwin, 1854. 



Chthamalus stellatus (Poli), 1795. 



Coronula diadema (L.), 1767. 



South Trinidad Island : 



Lithotrya atlantica, n. sp. 

 Balanus imp)rovisus, Darwin, 1854. 



On the hull of the " Terra Nova " : 

 Lepas afjinis, n. sp. 



The following is a systematic description of the collection. 



Sub-order PEDUNCULATA. 



Family POLLICIPEDIDiE. 



1. Smiliimi spinosum, Ann., 1911. 



Scalpellwn (Smilium) spinosum, Annandale, Tr. N. Zealand Inst., XLIII, p. 164 (1911). 



I have opened several individuals of this species without finding a dwarf male. 

 One specimen harboured in its mantle numerous nauplius larvae, somewhat clumsy in 

 shape and with rather short limbs. Very young barnacles are often to be found 

 scattered over the stalk and mantle of what was presumably their parent. Probably 

 the larvae have little power of swimming. The case resembles that of S. stearnsi, 

 described by Hoek (Siboga Exped. Rep., Cirrip. Ped., p. 73, 1907). 



Station 96 (7 miles E. of North Cape, New Zealand, 70 fathoms). 



2. Scalpellum {Arcoscalpellum) discoveryi, Gruvel, 1907. Fig. 1. 



Scalpellum discoveryi, Gruvel, Nat. Antarct. Exped. 1901-1904 [" Discovery"], Nat. Hist., Ill, 

 Crust. VI, p. 2, pi. figs. 4-6 (1907). 



A specimen of this species was taken on the pycnogonid Ammothea glacialis in 

 the Antarctic. It is intermediate in characters between the two individuals figured by 

 Gruvel, and, like them, shows the features of the section Mesoscalpellum,^' though 

 there may well be a later stage of the species which has those of a Neoscalpellum. 



* See Pilsbry, Proc. Ac. Philadelphia, LX, p. 110, 1908. Mesoscalpelliim and Neoscalpellum are 

 treated by Pilsbry as sections of the subgenus Arcoscalpellum, s. lat. 



