144 Njcholi^s and Jackson. — New Species of Mee/dloscolex. 
Tlio first dorsal pore lies between segments 4 and 5. 
Tlie male pores nre very close togetlier (PI. XVJII, fig. 9) and 
ore situated in segment 18 at the apex of an oval papilla, which 
has a transverse furrow both in front and behind the pores (PI. 
XVIII, fig. 6). 
The female pores lie in segment 14, near to the mid-ventral 
line, l)ut they cannot readily be made out without having recourse 
to serial sections. 
Tliere are two pairs of spermathecal pores, between segments 7 
and 8, and 8 and 9. They are mid-ventral in position, extremely 
close together, and lie in a small oval depressed area. 
The accessory glands consist of two jiairs of glandular papillae 
lying intersegmentally (19/20 and 20/21) and all equidistant from 
the mid-ventral line. In one s];('cijneu from the Deej) Kiver another 
pa]»illa was found at 21/22, lateral but unpaired, which condition 
was ol)served, also, in several s])ecimens taken from the Frankhnul 
River region. In others, again from the Prankland, the third pair 
of glands was coin])lete. Where three jiairs wei'e jiresent, the last 
two Avere always slightly closei' together than the others. 
Anniomy. None of the sejita shoAv anv distinct thickening' 
• o 
(rut: There is a large gizxard in segment (i. 
has a vascular swelling in each of segments 10-14, 
14 lieing the largest. 
The oesophagus 
that in segment 
( irculatory system: The last heart is in segment 13. 
Xepliridial system: iMieronepliridia are present throughout the 
entire lengtli of the Avonn, 
Male reproductive organs: Three pairs of sperm sacs are pre- 
sent on septa 9/10, 10/11, and 11/12, projeMing into segments 10, 
11, and 12. They are thick and seem to be made up of a number 
of small lobes closely i>ressed together and flattened. The sacs of 
the thiid pair are the largest, Tliere is a ]>air of free testes and 
related funnels, in both segments 10 and 11. The spermiducal gland 
is fiat and leaf-like, very little longer than Avide, and projects into 
segments 17 and 19. The duct oj)ens into the posterior lobe of 
the glandular mass. 
The spermathecae (PI. XVIII, fig. 7) are sac-like, Avith a 
s]ilierical eidargemeiit. The diverticulum is usually about Iavo- 
Ihiids the length of the main l)ody, although in some specimens it 
leaches an equal length. In opens from the sjAermathecal duct. 
Avlnch is very short. In section, the ducts from each side are seei 
to o])en to the exterior side by side on the mid-ventral line, sc 
