THE EARTHWORMS OF THE MALDIVE AND LACCADIVE ISLANDS. 375 



are not, however, equally or similarly developed in all. In seven examples there are two 

 papillae plainly visible ; one lies between segments xii/xill and is, as a rule, much more 

 conspicuous by reason of its convexity than the second papilla, which is not intersegmental 

 in its position. It lies on xiv, though near to the anterior margin of that segment and not 

 between xiii/xiv. In six individuals one or other of these papillae was missing. In the 

 last individual the two papillae were between xi/xii and Xii/xiii, and both were of the same 

 character. I may observe that the papilla upon segment xiv and that upon segments xii/xill 

 occasionally showed considerable traces of being double. In no individual did I find a papilla 

 between xiv/xv such as is mentioned by Michaelsen in his description of P. matsushimennis 

 var. chathamianus. In addition to these papillae there are, as Michaelsen has pointed out, 

 others situated more anteriorly still. 



In four individuals there were very evident long, dumb-bell shaped thickenings of the 

 integument occupying the intersegmentary regions Vii/viii and viii/ix. Each is median and 

 unpaired and ends at the conspicuous orifices of the spermathecae. They do not obliterate 

 the intersegmental grooves. The orifices of the spermathecae correspond to the outer section 

 of the ventral couple. The male pores lie in an area which appears to me to be exactly 

 like that figured by Izuka for Pontodrilus matsushimensis^ . It is quite conspicuous even in 

 immature individuals. So also is the one genital papilla which follows the male pores. This 

 is as usual on the intersegment xix/xx and is generally hollowed out and sucker-like. It 

 is even apt to be squarish in outline. 



As to the internal characters of this species the chief facts which I have observed are 

 the following : the specially thickened mesenteries are those which divide segments vi/xill, 

 and they are all cup-shaped, with the concavity, of course, anterior. The gizzard is feeble, 

 but still recognisable ; it lies in the Vlith segment. In the xiiith segment are a pair of con- 

 spicuous and presumably contractile hearts. The nephridia begin in segment xiii. 



The racemose sperm sacs lie in segments xi and Xii. The sjiermathecae are plainly divisible 

 into a thin walled sac and a shorter thick walled duct. The tubular diverticulum is fully as 

 long as the pouch. The spermiducal glands have a long, curved, muscular duct of glittering 

 appearance, fully 2 mm. long. 



Locality: Minikoi, Laccadive Islands; and Goidu, Goifurfehendu- and Hedufuri, S. Mahlos', 

 both Maldive Islands. 



2. Megascolex mauritii (Kimb.). 



Lampito mauritii Kinberg Ofv. Sv. Ak. Forh. 1867, p. 103. 



This very common and widely spread Oriental species is abundant in the collection. 



Localities : Kumfinadu and Madu, both S. Mahlos ; Maungudu, Miladumadulu ; Goidu, 

 Goifurfehendu ; Hulule, Male ; Maradu, Addu, all Maldive Islands ; and Minikoi, Laccadive 

 Islands. 



3. Perionyx, sp. 



A number of examples of this characteristic Oriental genus were collected, but they were 

 quite immature and I am therefore unable to identify the species. 



Localities: Madu, S. Mahlos; Fainu, N. Mahlos; and Maradu, Addu, all Maldive Islands. 



1 Annot. Zool. Japan, ii. i. p. 21, Tab. 2, fig. 1. species. 



^ A single specimen from this locality may possibly not * The same observation applies to a few specimens from 



belong to the same species ; it was immature, but I refer it this locality. The spermathecae however were well developed 



to P. laccudivouis on account of the exact similarit.y of the and had each along diverticulum, thus increasing the hkeness 



spermiducal glands and of its general appearance to that to the examples from the Laccadives. 



