26o R. E. Lloyd : Phosphorescence in Marine Animals. [VoL. I, 



The third species which showed light was the Alcyonarian 

 Pennatula pendula (common in deep waters about the Andamans, 

 but only recently described by Thompson and Henderson, Inves- 

 tigator Alcyonarians , part i). 



This specimen merely showed faint evanescent light when 

 disturbed, but when placed in formalin solution rows of brilliant 

 light points at once appeared on its pinnules and remained in 

 evidence for at least a minute before dying out. This brilliant 

 display suggested the possibility of recording such phenomena by 

 photography ; and the idea of photography, involving as it does 

 the use of a dark room, helped me to see that our dredging in the 

 dark, a most inconvenient procedure, was also unnecessary. The 

 same results could obviously be obta ned by removing the speci- 

 mens to a dark room, where any well-marked phosphorescence 

 could be recorded by placing them in a bottle of formalin solution 

 on which a camera with very sensitive plates had previous y been 

 focussed. 



It is hoped that such experiments will be carried out in future. 

 Nevertheless my thanks are due to Commander W. G. Beauchamp, 

 R.I.M., for allowing trawling at night and for the skilful way in 

 which it was carried out under his personal supervision. 



Description of a new Polych^te Worm. 

 Family APHRODiTiDi^. 



Lepidasthenia stylolepis, Willey, sp. nov. 



" All appendages glabrous except the palps, which bear rows 

 of small b unt papillse. Antennae Fub-equal, the med an slightly 

 longer than the lateral and less than one-third the length of the 

 palps. Elytra very small, borne upon long peduncles, which are 

 somewhat shorter than the parapodia. Notopodia obsolete, with 

 acicula but without setse. Neuropodial setae (fig. 4) of the anterior 

 segments (and perhaps of all when unworn) with fil form tips below 

 which there is a deep bidentation, as well as subterminal serrula- 

 tions There are thirty-seven segments present in the specimen, 

 which is incomplete behind. Segments with brownish transverse 

 bands along the posterior border. Dorsum quite exposed, the 

 elytra directed away from it, on their stalks. The first ventral 

 cirrus as long as the parapodium, the rest very short. Dorsal 

 cirri pigmented, some pale, some fallen off, borne upon long pe- 

 duncles which are as long as the parapodia, the cirri being shorter 

 than their peduncles. 



Elytra on segments II, IV, V, VII, IX, ... . XXI, 

 XXIII, XXVI, XXIX, XXXII, XXXV. 



Both cirriophores and elytrophores penetrated by a caecal 

 diverticulum of the gut arising from the latter by a very narrow 

 pedicel, then widening out." 



