6 PROCEEDIJSTGS OF THE NATIONAL. MUSEUM vol.80 



tion. There are three smaller papillate structures at the inner side 

 of the base of each of these projections ; they may, however, be under 

 the surface. Eight submedian papillae, in addition to the paired 

 lateral organs or amphids, are present. 



Male (incomplete specimen), 75 mm. long by 560jli wide. The tail 

 is provided with a pair of caudal alae. The larger left spicule is 

 2.75 mm. long and 42ju, wide. The right spicule is only 420/a long. 

 The single specimen is in poor condition, and the caudal papillae are 

 somewhat difficult to see. There are five papillae supporting the 

 right side of the caudal alae. The most posterior of these might be 

 considered adanal. On the left side there are seven pedunculate 

 papillae of which the most posterior two might be considered adanal. 

 Toward the end of the tail there is a group of at least three sessile 

 cone-shaped papillae, two on the right and one on the left side of the 

 cone-shaped tail ; the tail does not bear denticles. 



Fetnale^ 220 mm. long by approximately 2 mm. wide. Anterior 

 part of the esophagus 550/x to 570/x. long and about 220ju, wide ; poste- 

 rior part 520)U, wide, length not determined. Vulva 850/x from the 

 anterior end of the body. Opisthodelphous ; the embryonated eggs 

 present in the uterus measure 50)u, to 52/i, by 33)u, to 34/x, and are pro- 

 vided with an operculumlike structure at both ends. Tail bluntly 

 rounded ; anus somewhat atrophied, situated at the end of the tail. 



Host. — Varanus flavescens. 



Location. — Under the peritoneum. 



Distribution. — Calcutta Zoological Gardens, Calcutta, India. 



Type specimens. — U.S.N.M. Helm. Coll. No. 8009; paratypes, No. 

 8010. 



Remarks. — This description was made from a restudy of the type 

 specimens. The most outstanding differences between H. spinigervnn 

 and H. gouldi., H. setiferwm., and H. onchocercwin are in the relative 

 coarseness of the left spicule. H. spinigerum might well be identical 

 with H. macrophallos^ as shown by Baylis, but there are important 

 differences in the relative lengths of the spicules and in the number 

 and position of the papillae on the tail of the male. 



HASTOSPICULUM MACROPHALLOS (Parona, 1889) Baylis. 1930 



Plate 3, Figitres 1-3 



Synonym. — Filaria macrophallos Parona, 1889. 



Description. — Hastospiculwm : Mouth elongate dorsoventrally, sur- 

 rounded by a circumoral elevation bearing a pair of laterally placed 

 truncate teeth or liplike organs. There appear to be three finger- 

 like processes converging toward the base of each of the toothlike 

 structures.- Baylis states that these may possibly be the attachments 



