136 MR. G. H,. FOWLER ON A NEW PENNATULA. [Feb. 21, 



autozooids, which are devoid of tentacles. Siphonozooids richly set 

 all over the ventral surface of the rachis except in the median ventral 

 groove, one row runniig from this surface halfway up the concave 

 borders of the leaves, while a second row passes dorsally and 

 anteriorly between the leaves to meet with the row of immature 

 autozooids on the latero-dorsal surface. Leaves triangular in outlit)e, 

 charged with long, fusiform, salmon-pink spicules. 



The colony, as is so frequently the case with Pennatulida, is 

 imperfect above, the top presumably having been bitten off and the 

 wound scarred over. The dimensions given below are therefore in 

 some points unreliable. 



The colour of the greater part of the colony is of a beautiful 

 salmon-pink, shading off to a whitish yellow on much of the stalk 

 and rachis, and also in the centres of the leaves — parts where the 

 spicules, to which the colour is due, are more thinly scattered. 



The stalk, which expands slightly below, is on its upper third 

 expanded into the bulbous enlargement so constantly met with in 

 the genus, and is here of the same brilliant salmon-pink tint as the 

 polyps and leaves. The rachis is marked both dorsally and ventrally 

 by a deep groove which is entirely free both from siphonozooids and 

 immature autozooids. 



The siphonozooids (fig. l)are placed mainly on the ventral surface of 

 the rachis, where they are roughly arranged in oblique ventro-dorsal 

 rows. They are especially massed at the bases of the leaves, from 

 which points start two rows of siphonozooids, the one running about 

 halfway up the concave (lower) border of the leaf itself ; while 



Fig. 1. 



A young leaf showing the triangular shape, the dorsal row of immature auto- 

 zooids, and the ventral row of siphonozooids appearing as small spikes. 

 Natural size. 



the other passes upwards on the rachis between the leaves, and, 

 bending still further upwards, generally meets the line of immature 

 autozooids at an acute angle on the latero-dorsal surface of the rachis, 

 close to the line of attachment of the leaf next above. The siphono- 

 zooids are not separable into two types by size or other character, 

 and are indistinguishable from the immature autozooids at the point 



