138 CALIFOKNIA ACADEMY OK .SCIENCES. 



were not visible from the exterior and could only be ascertained by dis-section and 

 transparent light. Viewed from the exterior the clitellum appears incomplete. 



/'('itinl '<rtii'. The longer seta is hooked at the apex and furnished with live 

 notchi's oil the inner side, very iiuicli as in //. Bu/din. Tiie shorter seta is le.ss curved 

 ami about | as long as ihc larger seUv. It is not iiooked and tlie free apex is slightly 

 forked, each prong being of the same lengtli. There is no flare or wing between the 

 two prongs (tigs. (JO, Gl and <)2). 



Oviducts. Both open together in a central pure in llu- median line in xiv, 

 very close to the groove between xiii xiv. In tin' laigust of the two adult specimens 

 the ovipore was situated abnormally between xv and xvi. 



fnteadne nm\ (j/(indx. A strong supni-pharyngeal gland as usual. (Jiz/.ard in 

 vii ami viii, separated l)y a thin wall, as in other species. Tubular intestine extends 

 from gizzard to xvii, and is in xv, xvi and xvii furnished with the three pairs of 

 calciferous diverticula, of which the two anterior ones are of difftirent construction 

 histologically just as in other species. The sacculated intestine commences in xviii. 

 There is a typhlosole. 



Spermathecd'. As usual, in vii and viii. Those in vii were slightly smaller, 

 and entirely confined to their somite, while those in viii projected their distal part 

 through the septum into ix. The distal part is only a little smaller tlmn the other 

 part. The spermatheca is much flattened. Seen from below it appears as in fig. .")2 in, 

 while seen from the side it looks as in fig. o2 n. The lower [)art is furnished with 

 a very small diverticulum, pointing forwards. The duct leading to the pore is very 

 short, almost not set off fiom (he lower sac. 



Oviducts are slender, tubular, with a small and narrow funnel. 



Nephrklin. Those posterior to xix are furnished with a ccelomic cell mantle 

 of oval form, even and regulau, and of the same size in the various ne|diridia. Pos- 

 terior to xix we find foiii- rows of nepluidia on each side of the median line, the rows 

 being regular and parallel. The most ventral nephridiura or n is situated between 

 the seta' couples 1 and 2 and 3 and 4. The other nephridia h, c and d are dorsal and 

 lateral. The two dorsal nephridia d and d are about as ecjuidi-stant as nephridia a and 

 a, and much closer together than the dorsal nephridia of B. nana, palmico/o and 

 Bolavi, the three other species which 1 have examined. The more ventral part com- 

 prising the outlet duct, etc., of nephridium c is longer than the corresponding parts 

 of the other nephridia, and not covered by the eodomic mantle. The clitellar nephri- 

 dia are larger and tiieir ducts thicker than tlie other anterior nephridia. The 

 nephridia anterior to clitellum are very small, except those in somites iv and v, where, 

 as usual, the nephridial ducts are long. Ivach nephridium a{)pears perfect, and built 

 on the meganephric plan (fig. 03). 



IJi'nhainla riKjosa is readily recognized and characterized by the large pa|)ilhe 

 on which open the two anterior prostate pores, by the four rows of nephriilia, l»y the 

 forked smaller penial seta', by the corrugation of the anterior somites, inclusive of 

 clitellum, by the pointed prostomium, by the flattened spermatheca\ 



Since this was written Rosa has described a new .\inerieaii iK'nliainia from 



