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. 



Si ze. 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 jlexibilis 

 which was dredged at 



Stat. 170. August 26, 1899. Lat. 3° 37.7 S., Long. i3i°26'.4E. Depth 924 m. Bottom: fine 

 grey mud. 



General Rem ark s. This species comes near to Verruca quadrangularis 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. quadrangularis with two teeth ; secondly 



the apex of the carina of V. casula does not project freely, while it generally does so in 



V. quadrangularis. 



7. Verruca niiida Hoek. 



HOEK, Cirripedia collected by H. M. S. "Challenger". 1883. p. 138, pi. 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 Verruca capsula 

 n. sp., which H. M. S. "Siboga" dredged at: 



Stat. 88. June 20, 1899. Lat. o°34'.6N., Long. H9°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 1 905 the number of living species had reached 49 : 1 species 

 being added to the list by Filhol 1 (B. Campbclli, 1885), 2 by Gruvel " (B. Dybowskii and 

 B. violaceus, 1903), 5 by Hoek 8 (B. corollifomuis, hirsuttis, rostratus, socialis and tennis, 

 1883), 1 by Lanchester' 4 (B. aeneas, 1902) and 1 by Fr. Muller 5 {B. armatus, 1867): in 

 Gruvel's "Monographie" of 1905 this number (49) of species is given. From 1905 up to the present 



1 Filhol, A., Mission de 1'Ile Campbell. Recueil de Mémoires etc. III. 2 e partie. Zoölogie. 1S85. p. 487. 



- Gruvel, A., Révision des Cirrhipèdes aupartenant 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. Troceed. Zool. Soc. London. II. 1902. 



5 Muller, Fritz, Über Balanus armatus etc. Archiv f. Naturgeschichte. XXXIII. 1S67. 



22 



