6 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 75 



Three females of this worm were found. In the absence of any 

 male specimens its generic affinities can not be determined with cer- 

 tainty, but so far as the female characters indicate, it appears to be 

 closely related to Dirojilaria, in which genus it is provisionally 

 placed. It differs from D. cory nodes (Linstow, 1899), a species found 

 in West African monkeys, in the much greater diameter relative to 

 the length, in the presence of four instead of two digitiform processes 

 at the end of the female tail, and in the position of the anus. 



HASTOSPICULUM SPINIGERUM, new species 



Figs. 7 to 11 



Specific diagnosis. — Hastospiculum: A very long, stout, cylindrical 

 w^orm, bluntly rounded at each end, but slightly greater in diameter 

 near the anterior than near the posterior end. Cuticle in both sexes 

 with moderately fine striations, becoming finer at the extreme anterior 

 end. In the female certain of the striations become greatly thick- 

 ened, forming prominent ridges which partially encircle the body. 

 Each ridge is produced into one or more spinelike processes, which 

 gives the cuticle a very rough texture. (Fig. 11.) In the male certain 

 of the fine striations are also enlarged at intervals, but they are not 

 produced into spines as in the females. The anterior end has a small 

 craterlike depression, in the center of which is the mouth. On each 

 side of the mouth is a small, truncated, pillarlike chitinous process, 

 with three minute papillae at the base of each, not clearly visible 

 except in end view. (Fig. 10.) The chitinous epaulettelike structures 

 and circumoral papillae described for the other species of the genus 

 are very rudimentary if present at all, and do not correspond either 

 with the figures given by Skrjabin (1923) for H. varani or by Yorke and 

 Maplestone (1926) for H. gouldi. The depression in the center of 

 which the mouth is situated is about 350ai to 400m in diameter in the 

 female, bounded only by irregular and discontinuous chitinous folds 

 or ridges. Immediately around the mouth is a more or less rectan- 

 gular area of slightly thicker chitin, at either side of which is situated 

 one of the chitinous pillars with three minute papillae at its base. 

 Indications of another demarcated chitinized area widening the oral 

 region dorsoventrally can also be seen. The esophagus consists of 

 two parts as in other members of the genus, the anterior part being 

 short and of moderate diameter, the posterior part long and very 

 wide. 



Male. — The single male specimen available lacks the head end. 

 The portion available is about 75 mm. long, with a diameter of about 

 560/x. The posterior extremity tapers for about the last 4 or 5 mm. 

 of its length and has a bluntly rounded end provided with a bursa- 

 like structure formed by short caudal alae which meet posterior to 



