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THE VOYAGE OF H.M.S. CHALLENGER. 
of the body ; thus the anal and oral poles have been approximated side 
by side. Tentacles ten, pinnate. Genital pore on the very minute space 
between mouth and anus. Five double rows of pedicels along the middle 
portion of the body (viz., the enlarged part of the bottle) ; in consequence of the 
peculiar shape of the body the pedicels give the impression of being placed in 
ten double rows confluent at the larger rounded extremity. 
Genus 1. Rhopalodina, Gray, 1853. 
Rhopalodina lageniformis, Gray, 1853 ; Semper, 1868 ; Ludwig, 1877. 
’ Body-wall stiff, from irregular, perforated plates and comparatively few tables, with 
a large perforated disk and a rudunentary spire. Four respiratory-trees. Anus 
with ten radial papillae and five interradial teeth. Calcareous ring composed of ten 
irregular pieces. Anal portion of the intestine surrounded by ten regular pieces. 
Habitat . — Congo coast (Gray). 
Family Aspidochieota]. 
Genus Pcdopatides, n. gen. 
Body more or less distinctly depressed, with a rather considerable brim surrounding 
it not only on the sides, but also round the extremities. Tentacles nineteen or twenty, 
of the shape common in Aspidochirotse. Mouth ventral. Anus dorsal or subdorsal. 
Ambulacral appendages — pedicels and processes (= papillae). The pedicels form a 
double row along the odd ambulacrum, excepting anteriorly where they are absent. 
The processes form a simple row round the margin of the brim which surrounds the 
body, and are, besides, scattered along each of the two dorsal ambulacra. Interanibulacra 
naked. Two bundles of genital tubes present. 
Pcelopatides confundens, n. sp. (PI. IX. flg. 7 ; PI. X. figs. 1, 7). 
Body very much flattened and depressed, elongated, almost equally broad or slightly 
narrower posteriorly, with the anterior and posterior extremities obtuse and rounded. 
Mouth completely ventral in position, surrounded by nineteen or twenty (?) retracted 
tentacles. Anus completely dorsal. The brim surrounding the body very considerable, 
and carrying on its margin a series of rounded low protuberances, which, especially 
round the anterior extremity of the body, are more prominent and pointed, almost 
