Xotesfrom the Gatty Marine Laboratory. 167 



99. Delias! d' Alhertisi. 



cf. PierU (T Albertm, Oberthiir, Ann. Mus. Civ. Geneva, xv. p. 480, 



pi. iv. fig. 4 (1879-80). 

 2 . Delias disctis, Honratb, Berl. ent. Zeit. x-iti. p. 130, pi. ir. fig:. 4 



(1882). 



New Guinea. 



A curiously coloured species, vaguely resembling Tenaris 

 and Dyctis. 



Since the completion of this Revision Mr. Grose Smith 

 has described three additional species in the Ann. & Mag. 

 Nat. Hist, for April, 1897, p. 403. 



XIV. — Xofes from the Gatty Marine Laboratory , St. Andrews. 

 —No. XVIII. By Prof. M'Ixtosh, M.D., LL.D., 

 F.R.S. 



[Plate m.] 



1. On the Phosphorescence of Gatty ana {Xychia) cirrosa, Pallas. 



2. On a new Eiarne {E. atlantica) from Rockall. 



3. On the British Species of Pholoe. 



4. On a Collection of Annelids made by Canon Norman in Norway. 



— Part I. New Evarne and Two Species of Sthenelais. 



1. On the Phosphorescence of Gattyana (Nychia) cirrosa, 



Pallas. 



The alteration of the generic name of this not uncommon 

 species, as Dr. Merle Norman has shown in a carefully prepared 

 manuscript on the subject, which I have had the privilege of 

 perusing, is necessary, since the name Nychia^ given to it by 

 Malmgren in 1865, had already been used by Stal for one of 

 the Hemiptera. 



G. cirrosa has long been known as a comraensalistic Polynoid 

 in the tubes of Chcetopterus. Hitherto, however, the specimens 

 of this annelid on the East Coast have chiefly been procured 

 after storms or from deep water. Lately they have been 

 frequently found as comraensalistic forms in the tubes of 

 Amphitrite dehilis, Dalyell {Johnstojii, Mgrn.), and of compa- 

 ratively large size. The fact that such species as Polynoe 

 scoloj>endrina, habitually found in the tubes of Terebellce, are 

 phosphorescent suggested experiment in the present instance, 

 with the result that G. cirrosa was also found to possess this 

 property. Irritation in the dark causes the scales to gleam 



12* 



