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Stat. 310. February 12, 1900. Lat. 8° 30' S., Long. ii9°7'.5E. Depth "ji m. Bottom: sand 

 with few pieces of dead coral. Half a dozen small specimens, some of them 

 attached to the shell of a Lamellibranch {Aviatla), others to a Bryozoan (like 

 Halodactylus), others to a species of sponge. 



General Remarks. This seems to be a rather common species at the places where 

 it occurs. It doubtless belongs to the group of species of which B. amaryllis is the best known. 



9. Ba/anus feu nis Hoek. PI, XVII, fig. 14—19. PI. XVIII, fig. 1. 



Hoek, P. P. C, Report on the Cirripedia of the Challenger Expedition, 1883, p. 154, pi. XIII, 

 fig- 29— 33- 



This species also belongs to the group of species with narrow radii, striated scuta, terga 

 with the scutal margin hollowed out and relatively broad spur. When describing the species 

 as a new one (1883), I pointed out that it corresponds in several details to B. amaryllis. 

 Several other new species of the same group were collected during the cruise of the Siboga. 



A pale-red-coloured specimen of considerable size was brought up with the dredge from 

 a coral bottom and a depth of 275 m. It is an incomplete specimen, without opercular 

 valves, and it broke into pieces before I had sufficiently investigated it. A small specimen of the 

 same colour and with valves of corresponding shape, was found attached to one of the com- 

 partments of the larger specimen (PI. XVII, fig. 14). The latter belongs no doubt to the 

 same species. 



The shell is conical, its orifice medium-sized, and distinctly toothed. The radii are extre- 

 mely narrow, with their summits very oblique, in the smaller specimen visible only along inferior 

 half of valves. The alae are considerably broader, wih their sumttmis rounded. The compart- 

 ments are furnished on the inner surface with vertical ridges, which increase in size and strength 

 towards the basis. Neither compartments nor radii have pores. Of the larger specimen the basis 

 is wanting ; the smaller one has a delicate calcareous basis, with ridges radiating from the centre. 

 I could not see any canals in the basis. The diameter of the smaller specimen is 7.5 mm. near 

 the basis, its height 4.5 mm.; the highest compartment of the larger specimen measures 32 mm. 



The scutum (PI. XVII, fig. \^a and d) is delicately but distinctly striated longitudi- 

 nally. The inner surface is roughened on the upper part, the adductor ridge is feebly deve- 

 loped, the articular ridge is rather prominent, and extends over half the length of the tergal 

 margin-, the ter gum (PI. XVII, fig. 15, ó and d) has the scutal margin only slightly hollowed 

 out, the spur is rather broad, and extends to a distance from the basi-scutal angle, which is 

 not greater than its own width. The valve is slightly beaked. Studying it with a strong lens, a 

 tracé of longitudinal striation is seen at the surface. 



The description I gave of the animal's body in the Report on the (Shallenger-Cirripedia 

 can be completed with the following remarks : 



Mouth. Labrum (PI. XVII, fig. 16) with the central notch shallow, wide at entrance, 

 the three teeth on each side close together, the height of the sub-triangular shield-like portion 

 about three-fourths of its breadth. 



Pal pi slightly elongate, with the upper margin nearly straight, and the basal margin 



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