2G8 PBOE. MARSHALL AND MR. G. H. FOWLER ON" THE 



Section IV. VeretillejE. 



Family i. CavernulariidjE. 



Cavernularia obesa, Valenciennes . 



Family ii. LiTUAMiDiE. 



Lituaria phalloides, Pallas. 

 Policella manillensis, Kolliker. 

 Policella tenuis, sp. nov. 



The specimens, which are in excellent condition, were obtained 

 in shallow water ; and a large proportion of them from mud-flats 

 exposed at spring-tides. 



In the following descriptions we have employed the term " ray," 

 as the equivalent o£ the German " Strahlen," to indicate the bars 

 of calcareous spicules which traverse the leaves of many Penna- 

 tulida ; and have used the word " spine " to designate the ends of 

 the rays which project freely beyond the margin of the leaf. 



In describing the leaves, we have used the term " ventral 

 border " to indicate the free ventral edge of the leaf, from the 

 attachment to the rachis to the tip of the leaf. By the " height " 

 of a leaf we mean the greatest measurement across the leaf at 

 right angles to the ventral border. All measurements are given 

 in millimetres. 



Description of the Specimens. 



Section I. PENNATULEiE. 



Subsection 1. JPenniformes. 

 Family i. Pteroeididj3. 

 Grenus Pteroeides, Herhlots. 



Pteroeides elegans, Herldots. (Plate XXII. figs. 1 & 2.) 



A single specimen of this species was obtained from the 

 Andaman Islands. 



The species was established by Herklots *, in 1858, on a single 

 specimen in the Leyden Museum, believed to come from the 

 Indian Ocean. A fuller description of this specimen, the only 

 one recorded as yet, was givc/i by Kolliker f in 1872. 



The colony (fig. 1) is long and slender; the feather longer 

 than the stalk, and the rachis and stalk of nearly equal and 



* Herklots, ' Notions pour scrvir a l'etudo dee PolypiorsNagcurs ou Peiiiiatu- 

 lidM ' (.Amsterdam, 1858), pp. 21, 22, and pi. vi. fig. 2. 



\ Kolliker, AnafomiHch-Hyslcmjitiaclie Pesehreibung dor Alcyonarion : I. Die 

 Pennatuliden (Frankfurt a. M., 1872), pp. 67, 58. 



