466 ARABIAN NEMATODES, 



the middle of the body. I saw no papillae either pre- or post- 

 anal. 



Hah. — Marine sand, Aden, Arabia. 



Desmodora, De Man. 



D. nudicapititata, n.sp. . g ^.^ ^.g — ^ pg"9»ii"- The thick 



and naked cuticula displays about 700 conspicuous trans- 

 verse strise resolvable with the highest power into rows of 

 fine longitudinal markings. These strise are not apparent 

 on the head, but begin 0*8% of the length behind the 

 mouth, the head thus acquiring a naked appearance, which 

 is heightened by the absence of cephalic setaj and papillae. 

 The neck diminishes most rapidly in the anterior third where 

 it is convex-conoid. The rounded naked head, bearing the 

 lateral organs, is continuous with the neck and presents in 

 front a small, simple, shallow depression, the pharynx, which has 

 the form natural to three rounded lips not shutting closely together. 

 The oesophagus is ordy one third as wide as the neck but expands 

 at both ends especially the posterior where it forms a somewhat 

 indistinct elliitsoidal or pyriform bulb as long as the neck is wide. 

 There is a distinct cardiac collum. The intestine is not so wide 

 as the bulb of the oesophagiis. The nerve-ring is as broad as the 

 oesophagus at the point encircled and scarcely at all oblique. 

 Nerve-cells are abundant and conspicuous. Tail conoid to near 

 the end, where it is half as wide as at the anus, then in the final 

 tenth convex-conoid to a ])oint. Caudal glands are present. The 

 female sexual organs are double and symmetrical, occupying about 

 30% of the length of the body. The projecting vulva is connected 

 by the vagina with the two branches of the uterus each of which 

 is in turn connected with a reflexed ovary, reaching one half to 

 two thirds the way back to the vulva and containing about eight 

 developing ova. Eggs probably half as wide as the body, and 

 three times as long as wide. 



;g— p^ — iTHri — r? ^ ™"'' The tail of the male resembles that of the 

 female in all respects. The two equal, linear, arcuate or 



