436 Mr. W. S. Dallas on Atelides centrolineatus. 



Halichondria panicea. On sea-weed round the Calf. 



incrustans. Dredged up off Douglas Head in 18 fathoms 



water : common in every locality. 



fruticosa. Dredged off Laxey in 16 fathoms water. 



Since my last paper on this subject was published, I have been 

 able to identify the following species of MoUusca in addition to 

 those mentioned in it : — 



Chiton cancellatus. 

 cinereus. 



j.runum. 



All the Chitons, except marmoreus, a vei*y marked species, I 

 found in considerable abundance, dredging on dead shells. 

 C. cinereus was found on rocks on the coast in Douglas Bay. 



Ascidia vitrea. Dredged off Laxey Head. 



virginea. Dredged off Laxey Head. 



Goniodoris castanea. On sea-weed in Douglas Bay. 



Botrylloides albicans. Not uncommon on rocks. 



Botryllus violaceus. On rocks in Douglas Bay. 



polycyclus. On rocks in Douglas Bay. 



Leptoclinum violaceum. Douglas Bay. 



The names used for the Molluscous animals are those given 

 in Forbes and Hanley^s work on the ^British Mollusca' now in 

 course of publication ; those of the Crustacea are the same as 

 employed in BelFs ^ British Crustacea,' and Desmarest's ^ Con- 

 siderations generales sur les Crustacees.' The nomenclature of 

 the Zoophytes is taken from Forbes's ^Echinodermata ' and John- 

 ston's ' British Corallines.' The Annelidse and Sponges are named 

 from Dr. Johnston's numerous papers in the 'Annals of Natural 

 History' on the former family, and from his work on the 

 latter. 



XLV. — Further Note on Atelides centrolineatus. 

 By W. S. Dallas, F.L.S. 



Having obtained, since the publication of the last Number of 

 the ' Annals,' specimens of both sexes of the Hemipterous insect 

 which I there described under the name of Atelides centrolineatus j 

 I think it desirable to add one or two particulars to my descrip- 

 tion, which, having been drawn from a mutilated specimen of the 

 female, was necessarily imperfect in some respects. 



The individuals which I now possess are smaller than that pre- 



