134 Transactions. — Zoology. 



The following earthworms were collected at the Chatham 

 Isles : — 



1. Alloloboj)hora caligihosa, Sav. Several; from a peat 

 swamp ; collected by J. J. Fougere. 



2. Allolobophora rosea, Sav. Collected by Mr. L. Cock- 

 ayne, and presented to me by Dr. Dendy. 



3. Lumbricus, sp. Small and immature. 



The above are introduced, being more or less world-wide,, 

 though their home is Europe. 



4. Diporochata chathamensis, n. sp. From a peat swamp ; 

 collected by J. J. Fougere. 



5. Pontodrihis chathamensis, Michaelsen. Collected on 

 the sea-beach, in Shelly Land, by Mr. J. J. Fougere; and 

 other specimens by Mr. H. B. Kirk "from near the mouth of 

 the Waitangi Stream. They live," he says, "in what appears 

 to be pure sea-sand, and at high tide are covered by brackish 

 water. They probably feed on decaying seaweed." 



6. Microscolex huttoni, n. sp. Collected in the bush by 

 J. J. Fougere. 



3. Diporochseta chathamensis, n. sp. 



Seven specimens were collected from a peat swamp ; pre- 

 served in formol. 



Colour. — Pale-pink ; no pigment. 



Dimensions. — 2 in. long by ^7 in. in diameter (i.e., 50 mm. 

 by T5 mm.). The worm is thus very slender; the seg- 

 ments relatively long and well marked. Usually about 100 

 segments, though one specimen of the usual size consists of 

 only 57 segments. 



The prostomium is partially embedded in the buccal seg- 

 ment for about one-third the length of the latter, but it has no 

 posterior bounding furrow. 



The chata are sixteen in each segment throughout the 

 worm, eight on each side, at nearly equal distances apart. 

 The dorsal gap is only about one and a half times the normal 

 gap, the ventral gap rather greater. The chaetee are more 

 distinctly hooked than in most worms. 



The clitelhim is yellowish, and complete. It covers seg- 

 ments 14, 15, and 16. The intersegmental grooves and the 

 chsetae are still evident. 



Genital Pores. — The male pores are on the 18th segment, 

 each on a large, depressed, oval, white papilla; the two 

 "porophores" meet one another medially, forming a dumb-bell- 

 shaped glandular band extending right across the segment. 

 The actual pore (though invisible under a lens) is in line with 

 the most ventral chseta. Two transverse " tubercula puber- 

 tals," on the intersegmental grooves 17/18 and 18/19 respec- 

 tively, meet the dumb-bell, and the whole glandular structure 



