1896.] FBOM TUB SANDWIOn ISLANDS. 203 



But I possess specimens from Hong Kong which cannot be 

 distinguished. One of these has four papillfe near the male pore 

 of one side of the body. It therefore approaches Perichceta 

 bermudeiisis, which has a considerable number of such papilliB. 

 These two species are now hardly to be separated. 



Perichaeta sandvicensis, n. sp. 



The largest example of this species measures 100 mm. in length, 

 aud has 105 segments. 



The dorsal pores commence xi./xii., aud are visible on the 

 clitellum. 



The wto-formula is the following : — 



I. V. XII. XVI. 



21 33 52 53 



The setae of the first two segments are small ; those of the next 

 four are stronger, after which they again diminish. The setas on 

 either side of the median ventral Hue are not longer than those 

 elsewhere. 



The clitellum occupies segments xi\'.-xvi., and has no setso. 



The male pores are separated by 18 setaj. They were in most 

 of the specimens very prominent. 



There are no genital papillm. 



The first septum divides segments v./vi. ; this and the one 

 which follows are very stout, aud bound to each other by 

 numerous muscular threads. The septum vii./viii. is not so thick. 

 The next two, as in other Periclicetce, are absent. After the 

 giward are two strongest septa) ; to the first of these the hinder 

 part of the gizzard is attached by at least live muscular straps. 



The alimentarij canal presents no character of any particular 

 interest. 



The last heart is in segment xiii. 



The sperm-sacs are in segments xi. and xii. The sperm-reser- 

 voirs of segment xi. are much larger than those of segment x. 



The spermiducal glands are much incised, and occupy about 

 three segments. The duct is long and curved, and is without a 

 terminal sac. 



The spermathec(B are two pairs in vii. and viii. The pouch has 

 not a very long duct. The iliverfciculum is not very long ; it is 

 bent often in a zigzag fashion, aud does not terminate in a suddenly 

 dilated extremity. 



Hab. Lanai, 2000 ft. ; Mauna Loa, Hawai, Molokai. 



Remarks. — The only species with which it would be possible 

 to confuse the present are PericJueta annulata and Perichceta 

 japonica. In the latter, however, the male pores are described by 

 llorst ' as lying upon a J-shaped groove, wl\ich extends on to 

 segment xvii. In the former, according to tiie same author, the 



' " New Speeiea of tbe Qeniis Megascolex, &c," Notes Lejd. Mus vol. t. 

 p. 182. 



