150 
Basis. The form of the interspace left open between the basal edges of the parietes 
is elongated oval, about three times as long as broad. 
Size. The height of the shell is 2.5 mm., the distance from the apex of the rostrum 
to that of the carina 2 mm. 
The specimen was found attached to a small piece of stem of Chrysogorgia flexbilis 
which was dredged at 
Stat. 170. August 26, 1899. Lat. 3°37'.7S., Long. 131°26'.4 E. Depth 924 m. Bottom: fine 
grey mud. ; 
General Remarks. This species comes near to Verruca guadrangularis Hoek from 
the South Atlantic, the main difference being that the rostrum of the present species articulates 
with the carina with one tooth only, and that of V. guadrangularis with two teeth; secondly 
the apex of the carina of V. casuda does not project freely, while it generally does so in 
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7 , A 
V. qguadrangularis. 
7. Verruca nitida Hoek. 
HoEK, Cirripedia collected by H.M.S. “Challenger”. 1883. p. 138, pl. XII, figs. 6—7. 
Only a single specimen of this species was collected for the first time, by the Challenger 
near the Talauer Islands, between Mindanao (Philippines) and Halmaheira, at a depth of 915 m. 
Another single specimen was found attached to one of the specimens of Verraca capsula 
n.sp., which H. M.S. “Siboga” dredged at: 
Stat. 88. June 20, 1899. Lat. 0°34'.6 N., Long. 119°8.5 E. Depth 1301 m. Bottom: fine 
grey mud. 
This locality is situated at the northern entrance of the Strait of Makassar. The size 
of this specimen is: height about 9 mm., distance from the apex of the rostrum to that of 
the carina 8 mm. It is slightly larger than the specimen of the Challenger, which in other 
characters resembles it closely. 
Genus Balanus Auct. 
Darwin, in his Monograph (1854), enumerated 45 species of Balanus, 39 of which 
were living, and 6 fossil. In 1905 the number of living species had reached 49: 1 species 
being added to the list by Frruot'! (B. Campédelli, 1885), 2 by GruveL® (B. Dydowskiz and 
B. violaceus, 1903), 5 by Hoek’ (B. corolliformis, hirsutus, rostratus, socialis and tenuts, 
1883), 1 by Lancuester* (2. aeneas, 1902) and 1 by Fr. MUtLier® (B. armatus, 1867): in 
GruveL’s “Monographie” of 1905 this number (49) of species is given. From 1905 up to the present 
1 FirHoL, A., Mission de l’Ile Campbell. Recueil de Mémoires etc. II]. 2& partie. Zoologie. 1885. p. 487. 
2 GRUVEL, A., Révision des Cirrhipédes appartenant a la collection du Muséum (Operculés). Nouvelles Archives du Muséum. 
(4). V. 1903. p. 95. 
3 Hoek, P. P. C., Cirripedia of the Challenger Expedition. 1883. 
4 LancHEsTER, W. F., Crustacea of the Skeat-Expedition. Proceed. Zool. Soc. London. II. 1902. 
5 MULLER, Fritz, Uber Balanus armatus etc. Archiv f. Naturgeschichte. XXXIII. 1867. 
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