179 
in the other ramus. Few (2—3) and small teeth (PI. XV, fig. 15) are disposed on the protu- 
berant parts of the anterior face of some of the middle segments of both rami. 
Fourth to sixth cirrus have the same, or nearly the same structure, the only diffe- 
rence being that the number of segments increases a little from the 4 to the 6‘: the number 
of segments is 13 and 15 in the fourth, whereas the sixth pair has 16 and 17 segments. The 
greatest number of spines (Pl. XV, fig. 16) observed on the inner face of the segments was 
four pairs. The spines disposed on the dorsal surface of each segment, close to its upper margin, 
are very short in this species. 
Penis not very long, narrow in the distal part. Hairs scattered over surface and forming 
a little tuft at the extremity. 
The only specimen was collected at: 
Stat. 117. July 12, 1899. Lat. 1°0'.5 N., Long. 122°56’ E. Kwandang-Bay-entrance. Depth 
(chart) 80 m. Bottom: sand and coral. 
General Remarks. This species shows resemblance to my new species B. alatus; the 
shape of the opercular valves, and the structure of the parts of the mouth as well, is, how- 
ever, different, and as the two forms, moreover, inhabit quite different depths (2. a/atus living 
at a depth of 564 m. is a real deep-sea species) I think the safest way is to consider and 
to describe them as different species. 
3. Sectio: Striato-Balanus 
5. B. amarylls Darwin. Pl. XV, fig. 17—21. Pl. XVI, fig. 1—4. 
DARWIN, CH., Monograph, The Balanidae, Verrucidae etc. 1854. p. 279, pl. VII, fig. 6. 
Of this species, which, according to Darwin is distinct and well-defined, samples were 
taken on different occasions: 
I. Stat. 50. April 16/18, 1899. Bay of Badjo, West codst of Flores. Depth up to 40 m. Bottom: 
mud, sand and shells, according to locality. 
A single beautiful specimen, attached to a shell of a small Z7¢dacna-like oyster. The 
shape of the shell is conical, the orifice is large, pentagonal, toothed. The colour is rose-red, 
the inferior half, slightly darker than the upper half, and darker and lighter transparent stripes 
of the same colour run longitudinally over the surface. Radii very narrow, reddish, with the 
upper margins very oblique, while the alae are broader and of a lighter colour. 
Size of the specimen: greatest diameter of the basis 17 mm., greatest height of the 
rostrum I4 mm. 
II. Stat. 258. December 12/16, 1899. Tual-anchorage, Kei-islands. Depth 22 m. Bottom: Litho- 
thamnium, sand and- coral. 
Numerous specimens of different size and shape. The larger, are nearly cylindrical spe- 
cimens with a cylindrical cup-formed basis, the shell growing wider towards the orifice. The colour 
si 
