BY T. HARVEY JOHNSTOX. 0« 



alcohol though thev may uncoil slightly. Some specimens 

 killed by usino formalin became uncoiled thmigh still bent. 



The male measures from 2.(5 to 3.3mm.. the female 3.5 

 to 4.(» mm. in length, the latter thus being only slightly 

 longer than the former. The body in both sexes has an 

 almost uniform thickness. .07 to .(»8mm.. which is rather 

 less than that given by Travassos. The width is maintained 

 from the posterior end almost to the head, the breadth 

 decreasing gradually at the anterior end. The cuticle is 

 thick and ornamented by \ erv numerous, clo.sely set. trans- 

 verse striations with a few longitudinal markings. The 

 lateral lines are i)romiuent. The cuticular expansions at 

 the anterior extremity vary somewhat in length ( Oo to .10 

 mm — generally about .08mm.) and ]iroject laterally from 

 3 to micra. extending slightly in front of the tiny month. 

 The oesophagus \\hich is not sinuous in my specimens, 

 reaches a length of .27 to .3.") mm., the anterior end being 

 occasionally slightly more .swollen than the succeeding 

 portion. 



The male Ijursa (fig. 4 and o) is ))rominent. its edges 

 being usually folded inwards s(^)mewhat like that of 

 NemafoiJitus neofoma as figured by Hall (1916, fig. 177). 

 The t«o lateral lobes are extensive, while the dorsal is short. 

 The dorsal ray system* consists of a small externo-dorsal 

 on each side and of a rather thicker median portion which 

 bifurcates, each terminal dorsal being again divided so that 

 the central ray ends in four little rays. The lateral ray 

 system comprises three well-defined rays, the postero- 

 lateral being the smallest, while the medio-lateral and 

 externo-lateral are of about the same size. The last named 

 is rather closely associated with the latero-ventral raj' (of 

 the ventral system) from which the ventro-ventral ray is 

 widely separated. 



The general arrangement is shown in figures 4 and o. 

 The rays are more opaque than the bursal membrane though 

 the dorsal rays are* almost transparent. The spicules are 

 verj' long and slender, each measuring from .40 to .o3mm., 

 averaging about .oOmm. One has its .sides bent so as to 

 form a groove for the reception of the other spicule. The 



*The nomenclature of the ray* is that given by Ransom (1911, p. 21) 



ami 1)v Hall (Unt)). 



