146 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 2 



sent; caudal alae in male. Nerve ring about 0.26 mm. from anterior 

 end. Excretory pore ventral and prebulbar, 1.48 mm. in male and 1.73 

 mm. in female from anterior end. Esophagus typical and about one- 

 third body length in female and about three-sevenths body length in 

 male. 



Male: Tail 0.14 mm. long. Spicule 1.36 to 1.58 mm. long. Acces- 

 sory piece well developed, V-shaped, 0.084 by 0.080 mm. Four pairs 

 genital papillae. Two precioacal pairs sessile, adcloacal pair on long 

 stalks, and caudal pair stout and pedunculated. Ventral cloacal lips 

 prominent. Caudal alae wide but only slightly extended ventrally; pos- 

 teriorly extend from body to caudal papillae. 



Female: Vulva slightly posterior to middle of body. Prominent an- 

 terior vulvar flap. Uteri divergent; connected to ovejector by a common 

 uterine stem. Eggs ellipsoidal, asymmetrically flattened, 0.086 by 0.185 

 mm. Tail long and pointed, measuring 0.76 mm. 



The species name refers to the long spicule. 



Affinities: A. longispicula may be distinguished from A. alaeuris on 

 the basis of the prebulbar position of the excretory pore, the greater 

 number of cephalic papillae, the character of the precioacal papillae, the 

 well-developed, pedunculated caudal papillae, the much longer spicule, 

 and the larger accessory piece. 



A. longispicula may be distinguished from A. iguanae on the basis 

 of its larger size, the prebulbar position of the excretory pore, the dis- 

 tinct cephalic region, the presence of the common uterine stem, the 

 unstriated alae, the precioacal sessile papillae, and the longer spicule 

 and accessory piece. 



The characteristics which distinguish this species from A. hirsutus 

 are its smaller size, the relatively greater length of the esophagus, the 

 larger number of cephalic papillae, the character of the genital papillae, 

 the fact that the caudal alae extend to the anterior of the distal fourth 

 of the tail, and the slightly longer spicule. 



A. longispicula may be differentiated from A. conspicua on the basis 

 of the absence of lateral alae, the prebulbar position of the excretory 

 pore, the greater length and different shape of the spicule, the absence 

 of the spike on the male tail, and the character and number of genital 

 papillae. 



The characteristics which distinguish A. longispicula from A. gala- 

 pagensis are the following: the stouter and longer body, the relatively 

 more posterior vulva, the more distinctly separated lips, and bluntly 



