].-0 PEECY SLADEN TRUST EXPEDITION. 



Besides the large specimen described, there are several smaller colonies and fragments 

 of a lighter colour (i, c, d). 



Localities, (a) Seyclielles (F 9), 37 fms. ; (i) Seychelles, (E 9) 37 fms. and (F 4) 39 fms. ; 

 (c) Salomon, 60-120 fms.; [d) Providence (D 3), 29 fms.; [e) Providence (D 11), 

 50 fms. 



Genus MENACELLA, Gray. 



20. Menacella sladeni, sp. n. 



A small, slightly branched imperfect colony of a whitish colour, with a yellowish axis, 

 with low dome-like verrucse, for the most part lateral. The sliort branches come off at 

 right angles and in one plane. The coenenchyma shows a predominantly longitudinal 

 arrangement of close-set tuberculate spindles. On the walls of the verrucse there is 

 a definite arrangement in eight double rows of small spindles en chevron, and the margin 

 of the verruca shows eight corresponding points, not very pronounced. The anthocodise 

 are for the most part retracted, hut those left protruding show an armature of crown 

 and points. The following measurements were taken of the length and breadth of the 

 spicules in millimetres :— "357 X -085, -289 X -017, 238 X "031, -153 X '085, -119 X "035. 



This form agrees with the genus Menacella so far as that has been defined by Gray 

 and Ridley. Thus it has fa) tuberculate fusiform spicules, (6) an eight-rayed anthocodial 

 armature, and (c) short, mainly lateral verrucae. Owing to the small size and imperfect 

 preservation of the specimen, we have been unable to amplify the diagnosis ; but as our 

 specimen does not agree with either of the species known to us — Menacella reticularis, 

 Gray, or M. gracilis, Thomson and Simpson (1909), — we have given it, for convenience of 

 reference, a specific name, M. sladeni. 



Localittj. Providence (D 3), 29 fms. 



Genus BEBRYCE. 

 21. Bebryce mollis, Philippi. 

 Tor description see: — 



(1) de Philippi : Arch. f. Natiirgesch. i. 1842, p. 33. 



(2) G. vou Koch : Fauna mid Flora des Golfes von Neapel.— Die Gorgoniden, 188*, pp. 55-57. 



(3) Thomson and Simpson : Alcyonaria of Indian Ocean, pt. ii. 1909, pi. 1. fig. 1, pi. 5. fig. 10, pi. 6. 



fig. 20. 



The verrucEe are wart-like, and only about 1 mm. in height ; the spirals are often 

 irregular ; there are four crowded verrucae at the tips of the branches, and these are no 

 larger than the others. 



The spicules include the following forms ; — 



(o) Stellate, 16-rayed shields with tuberculate bosses ; 014 x 0-17. 



(i) Irregular discs with bosses, derivable from the shield-type. 



(c) Somewhat irregular, capstan-like forms with finely tuberculate outer sui-faces. 



