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Cirri. First pair (PI. XV, fig. 21): rami unequal, sometimes very unequal. Number 

 of segments observed : 13 and 24, 17 and 32, 17 and 25, 13 and 24, 12 and 18. The lower 

 segments of the longer ramus are separated only indistinctly, those of the shorter ramus are 

 very protuberant. 



Second pair (PI. XVI, fig. 2): rami slightly unequal. Number of segments observed: 

 15 and 16, 18 and 19, 16 and 17, 16 and 17, 14 and 16. Most of the segments are distinctly 

 protuberant, with tufts of hairs placed on the tip of the protuberances. 



Third pair (PI. XVI, fig. 3): rami slightly unequal. Number of segments observed:- 

 18 and 21, 29 and 30, 23 and 26, 18 and 20. Segments not protuberant, but having the 

 anterior face rounded off. A tuft of hairs is situated on the extremity of this rounding, the 

 surface of which, moreover, is furnished with several rows of extremely small teeth. The margin 

 of the segment bears no teeth. The thorax bears a tuft of hairs or bristles at the basis of the 

 3 rd cirrus. 



Fourth and fifth pair with from 45 — 52 segments. Surface of pedicel of 5 th cirrus 

 rough, with numerous minute, spine-like teeth. 



Sixth pair has 54 to 55 segments in one specimen, 70, 75, 59, 58 segments respectively 

 in the other specimens. Segments in the middle part of the cirrus (PI. XVI, fig. 4) as long as 

 broad, towards the free extremity longer than broad, towards the basis shorter. As a rule each 

 segment has two pairs of very long spines on its anterior face, but sometimes, and then not 

 even in both rami, some of the middle segments have a 3 rd pair of very small spines. Between 

 the spines of each pair, and immediately beneath them, there is a dense brush of short hairs. 

 These brushes are stronger, the number of hairs greater, at the basis of the distal pair ot 

 spines of each segment. Each segment bears a group of short hairs on the posterior face 

 near the upper extremity. The surface of the lower part of the cirrus, to about the 15* to 

 20 th segment, is rough with numerous microscopical spinedike teeth. 



Penis not very elongated, much thicker towards the basis, tapering towards the extre- 

 mity. It is furnished, dorsally, near the basis, with a recurved hookdike point. 



Geographical and bathy m etrical distribution. Darwin knew this species only 

 from the 3 rd and 7 th provinces, which he distinguished for the distribution of the Cirripedia : 

 the Indian Archipelago and Australia. Weltner (1. c. p. 270) mentions specimens from Shanghai, 

 and the "Challenger" collected it near Kobe, Japan at two different places, where the depth 

 varied between 14.5 and 90 m. lts occurrence at different places in the Malay Archipelago 

 is proved again by the material collected by the Siboga. It has there been found in shallow 

 water only : the greatest depth from which it was dredged during the cruise of H. M. S. 

 "Siboga" was "up to 40 m.". The "Challenger" found it in Torres Strak at a depth of 

 14.5 m. According to Lanchester 1 , a variety of this species is found at Khota Bharu, Kelantan. 



6. Ba/anus bimac n. sp. PI. XVI, fig. 5 — 11. 



Shell conical, globular near the basis, with small and distinctly toothed orifice striped 



1 Lanchester, W. F., The Crustacea of the Skeat-Expedition. Proceed. of the Zoolog. Soc. London. II. 1902. 



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