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NEW ANNELIDS. 

 By the Key. Hilderic Friend, F.L.S., &c. 



The work of investigating the Annelids found in Great 

 Britain, which I am aided in doing by a Government grant, is 

 resulting in the addition of many new species to our lists. In 

 the present paper I purpose alluding to two new species which 

 have recently been received from Kew. In May a Wardian case 

 arrived from Peru, which was found to contain some small 

 worms. At first I discovered only two immature Perichaetids, 

 which I have so far not examined for actual identification. After 

 keeping the soil in which they arrived for some weeks I found 

 two specimens of a new Enchytraeid, which I have named 

 Fridericia peruviana. A full description of this species has been 

 submitted to the Eoyal Microscopical Society, and it would 

 therefore be out of place to repeat the details here. 



A later examination of the earth has resulted in the discovery 

 of a further addition, which I will now proceed to describe. The 

 new worm is at once seen to possess three gizzards, and this 

 points to the genus Trigaster, founded some years ago by Dr. 

 Benham. It is not necessary that I should repeat his descrip- 

 tion in full. I therefore take the brief summary which Beddard 

 gave in his invaluable * Monograph of the Order Oligochaeta,' 

 published in 1895 : — 



" Genus Trigaster, Benham. 



" Definition. — Setas strictly paired. Clitellum extensive, 

 xiii-xl. Three gizzards in vii-ix; calciferous glands absent. 

 Nephridia diffuse ; a mucous gland present. Penial setae absent. 



" This genus only contains one species : Trigaster lankesteri, 

 Benham (Q. J. M. S. xxvii. 94). 



" Definition. — Clitellum xiii-xl ; from segment xvii onward 

 there is a ventral area free from glandular modification. Pro- 

 stomium not imbedded in the buccal segment. Setae strictly 

 Zool. tth ser. vol. XV. July, 1911. y 



