322 Records of the Indian Museum. [Vor erin 
Internal Anatomy.—No septa are notably thickened. 
A soft, small and very rudimentary gizzard is present in 
segment vi. The sides of the oesophagus are much swollen out in 
xiii, and to a less degree in xii; the swellings are not set off from 
the alimentary tube, and their cavity is in free communication 
with the lumen. The intestine begins in xv. 
The last heart is in segment xii. 
The excretory system is meganephric. 
The male funnels are present in segments x and xi; testes, 
present in xi, were not certainly identified in x. The vesiculae 
seminales depend from the anterior wall of their segments into xi 
and xii. They are large flocculent-looking masses, squarish and not 
lobed, each meeting its fellow dorsally in the middle line, but not 
fusing there. 
The prostate is a compact-looking mass, confined to segment 
Xviii and causing septum 17/18 to bulge forwards. Its inner face 
can be separated into lobes. The duct arises in a hilus, forms a 
small loop with its convexity upwards (in the position of the dis- 
section), and then passes inwards to its aperture; it is of the same 
diameter throughout and rather soft. 
The ovaries and their funnels have the usual situation. 
The spermathecae, lying in segments viil and ix, are small 
and extremely simple in form; they are cylindrical with a rounded 
internal end, without any distinct duct, and without diverticulum. 
The penial setae (fig. 15) are small, in length *525 mm., and 
in breadth at the middle of the shaft 14. The shaft is straight 
and tapers towards the tip; the tip itself however is blunt and 
squarish. Nearthetip are a number of relatively stout short spines, 
arranged in rings, of which there are about five. 
Perionyx fulvus, sp. nov. 
(Plate xxxi, fig. 16). 
Calcutta, 3-vili-1g10 (R. D. Banerjee). A single specimen, incomplete 
posteriorly. 
External Characters.—Length 106 mm. (+), diameter 3°75mm. 
Colour yellowish brown, almost unpigmented, anterior segments 
with a darker, slightly bluish tinge dorsally ; a median dark dorsal 
stripe along whole length. Segments 139 (+). 
Prostomium epilobous 3, tongue partly cut off behind by an 
inturning of the sides. 
Dorsal pores from groove 4/5; an indication of a rudimen- 
tary pore in 3/4. 
The setal ring presents a small and rather irreguiar dorsal 
break, on an average less than 2yz. There is an irregular small 
ventral break in the anterior part of the body (less than 2ab), but 
none at all posteriorly. The setae are closer together ventrally than 
dorsally. The following numbers were counted:—48/v, 55/ix, 
52/xil, 53/xix, 55/xxv. 
