EAR THWORMS 4 1 7 



numerous examples which I have examined from the Sandwich Islands I find the 

 following state of affairs with regard to these variable structures. In 22 examples there 

 were no glands at all ; 13 had glands ; in 26 specimens the glands were either small and 

 on both sides or only present and small or well developed on one side. The proportions 

 seem to show that the gland is disappearing. As to the head papillae — there were none 

 at all in 24 ; in 14 there were three pairs on 7, 8 ; in 3 there were pairs on 7, 8, 

 9 ; in one there were pairs on 8, 9 ; in 10 there was a pair on 8 ; in one there 

 were pairs on 6, 7, 8 ; in 52 there were various degrees of asymmetry, sometimes 

 none being present on one side. 



Examples of the species were obtained on Maui, Mauna Loa Hawaii, Halemanu 

 Kauai, Kilauea Hawaii, Olaa Hawaii, Haleakala Maui, lao valley Maui, Honolulu 

 in imported earth from China. 



(3) Amyntas hesperidum Beddard. 



Perichaeta hesperidum F. E. Beddard, Proc. Zool. Soc. 1892, p. 169. 

 Perichaeta sandvicensis Id., ibid. 1896, p. 203. 



In my earlier paper upon this species founded upon the first gathering of Hawaiian 

 worms I instituted a new species for some smallish worms from several islands of the 

 archipelago. I have since re-examined the two original specimens of Amyntas hespei'i- 

 diim which I have still by me, and have compared them with some fresh individuals 

 undoubtedly belonging to the same species but coming from Hong Kong. The result 

 is that I have to make one or two slight corrections in my earliest account of 

 A. hespeHdum. I thought that I had noted a small terminal muscular bursa in that 

 species ; but on again studying the specimens and comparing them carefully with others 

 I find that what I took to be this distinctive structure was only the commencement of 

 the thick investing layers of the spermiducal gland duct as it traverses the body wall. 

 There is in fact no terminal bursa. In all the specimens the spermathecae, though 

 lying in segments 7 and 8, as I correctly stated, open backwards, i.e. in the inter- 

 segmental furrows 7, 8 ; 8, 9, as I also stated. I now find that this is also the case 

 with Perichaeta sandvicensis. The spermathecae as a rule lie in the 7th and 8th 

 segments but open at the posterior margins of those segments. In both worms the 

 diverticulum is coiled and the spermiducal gland has a rather sinuous duct which passes 

 rather forwards on its way from the gland to the exterior. In short I can detect no 

 differences at all between the individuals which I have referred to two species. The 

 older name must clearly have the priority and thus I must term these Sandwich Island 

 worms Amyntas hesperidum, inapt though the name undoubtedly is. 



This is a prevalent species in the gatherings from the islands. In my preliminary 

 account of the Sandwich Island worms I recorded it from Mauna Loa, Lanai, Hawaii 



54—2 



