78 



PROCEEDINGS OF THE TfATIONAL MUSEUM. 



47 /x and a length of 100 ji along the distal margin in the esophageal 

 region of body, the maximum height being attained in the next to the 

 last comb, which has an apparent height of 70 fx. In the ventral line 

 of the posterior portion of the body, anterior of the cloaca and be- 

 tween the two latero-ventral 

 lines of combs is a row of 8 

 fan-shaped, almost semicircular, 

 cuticular structures. (Se'e fig. 

 1.) These fans are beautifully 

 fluted. The last fan measures 

 53 fi from its base to its tip and 

 110 // along the base. They are 

 set obliquely, the anterior end 

 being to the left of the ventral 

 line and the posterior end being 

 to the right and overlapping the 

 anterior end of the succeeding 

 fan. I find no such relation 

 between the fluting of the fans 

 and the cuticular annulation as 

 Jagerskiold suspects of being 

 present. The fluting seems to 



Fig. 1.— Eictulabia splendida. tail of male, c, 



LATEHO-VENTRAL COMBS; /., VENTRAL FANS; pap., 



papilla; spic, spicules. 



be of the same nature as that of the 

 combs. In this region the body of the 

 male is flattened on that portion of 

 the ventral surface included between 

 the latero-ventral combs. (See fig. 2.) 

 The last two or three of these combs 

 are larger than the others and some- 

 what different in form, a modification which Jagerskiold thinks 

 is of ser^dce in clasping the female. There is a shght bursa membrane, 

 scarcely worthy the name of bursa, and resembling shghtly developed 

 caudal alee. There is only one pair of postanal papillae visible, 



/lomm. 



Fig. 2.— Rictularia splendida. cross 



SECTION, SEMIDIAGRAMMATIC, IN TAIL 

 REGION OF MALE. C, LATERO VENTRAL 

 combs; /., MID VENTRAL FANS; int., IN- 

 TESTINE; /. L, LATERAL LINES; V. S., 

 VESICULA SEMINALIS. 



