165 



and a transverse row of long hairs is seen in front of the base of each maxilliped; two 

 lists are found between head and trunk behind the maxillipeds. The lateral margin of the 

 head has a tolerably broad stripe of rather short hairs; this hair-covering extends upward 

 on the proximal part of the lateral surface of the head, besides forming a narrow transverse 

 belt immediately behind the head across the anterior part of the trunk. Except this hairy 

 belt the trunk is naked, and trunk-legs I have not been able to find. The genital area is 

 much larger than the head (fig. 2 a) and consists of a very large round plate which is a 

 little broader than long (fig. 2e); the central part of the plate is more thinly chitinised 

 (marked in the drawing by a light greyish tint), whereas the larger part of it is thick 

 and light brown. The genital apertures which are situated a little in front of the centre 

 of the plate, are exceedingly small in proportion to its size and are found close toge- 

 ther; their anterior extremities run nearly parallel, further backward they diverge 

 considerably; their muscles are turned a little forward and strongly outward, but do not 

 reach half the distance to the margin of the plate. The thin part of the plate in front of 

 and partly outside the genital apertures is furnished with a number of short hairs, and a 

 considerable part of the thinner area of the plate behind the muscles has some very short 

 hairs; close behind the genital apertures we see the caudal stylets which are exceedingly 

 small, and in front of these a diminutive transverse area very closely covered with extremely 

 short hairs; the remainder of the plate is naked (in the drawing one of the receptacula 

 seminis is indicated by a dotted line and marked r). 



MALE. It is large compared with the female (fig. 2b : fig. 2a), and in reality com- 

 paratively very large, exceeding in size all other males of the whole family: the smaller 

 one of my two specimens measuring -84 mm., the larger one -92 mm. in length. In shape it 

 stands far apart from all species known. Seen from below (fig. 2f), its length is to the 

 breadth as 5 to 3; the animal is broadest at or a little in front of the middle, somewhat 

 narrower towards both flatly rounded ends; moreover, the head is much shorter than the 

 trunk. Ofi' the posterior margin of the mouth the lateral border of the head is very sloping, 

 bending strongly outward, and more backward it forms a deep inward curve stretching poste- 

 riorly to a point a little outside the base of the maxillae; these arched borders and the 

 frontal border combined form the sides of a deep cup, the posterior part of which — if it 

 were not wanting — would pass across the base of the maxillae; in the middle of this cup 

 the rostrum is situated. Seen laterally (fig. 2g), the body is strongly curved, its ventral 

 side being pretty deeply concave, the dorsal outline very convex. This line, moreover, is 

 divided by three bends which are rather far apart and at equal distance from each other; 

 the foremost of these bends is on a line with the mouth, and coinciding with it at the back 

 the boundary of the hair-covering runs in a slightly oblique line towards the posterior angle 

 of the outstanding lateral border of the head, whereas from the two other dorsal bends 

 transverse depressions continue a good way on the lateral surface of the trunk. Finally, we 

 see on the hindmost half of the ventral side, of the trunk a large, but not very thick, flatly 



