NOTOMENIA-PRUVOTIA. 301 



Geuus NOTOMENIA Thiele, 1897. 



Notomenia THIELE, Zool. Anzeiger, xx,p.399 (see also Q. J. Roy. 

 Mic. Soc., 1897, p. 527). 



Small Solenogastres with moderately strong cuticle, club-shaped 

 calcareous spicules and ventral ciliated foot-groove; fore-gut with- 

 out a radula, with lobed salivary glands ; mid-gut with lateral con- 

 strictions ; efferent ducts of the gonads wholly separated and inde- 

 pendent, with the receptacula seminis opening directly outward. 



N. CLAVIGERA Thiele. 



Animal about 4 mill, long, oval in section, rounded in front, blunt 

 behind. Body-covering of moderately strong cuticle, from which 

 project club-shaped, somewhat curved, transversely annulated spic- 

 ules, which are about 60-100 micro-millimeters long and 12-15 

 thick ; the annulation being produced by ring-shaped folds upon the 

 inside of the hollow calcareous bodies. Ventrally a ciliated longi- 

 tudinal furrow runs with one bluntly projecting fold ; large glands, 

 which lie in the neighborhood of the upper oesophageal ganglion, 

 opening into the expanded anterior end. 



The so-called mouth cavity is capacious, filled with numerous 

 sensitive cirri. As well as can be seen, the fore-gut is separated off, 

 as described for Rhopalomenia, and it seems to be formed as in this 

 genus ; without a radula, its sheath being perhaps represented by a 

 ventral blind sack ; two large, lobed, salivary glands ; further back- 

 ward the midgut has strong, regular lateral constrictions ; behind, the 

 gut contracts, and opens into the cloaca. No copulating organ. 



Torres Strait, 20 fms. (Haddon). 



Notomenia clavigera THIELE, Zool. Anzeiger, xx, p. 398 (1897). 



Genus PRUVOTIA Thiele, 1894. 



Pruvotia THIELE, Zeitsch. f. Wissensch. Zool., Iviii, p. 272 (in text), 

 type Proneomenia sopita Pruvot. 



Similar to Rhopalomenia, but with no trace of a radula or sali- 

 vary glands, and with a highly developed pre-anal gland. 



P. SOPITA (Pruvot). PL 46, figs. 57, 58, 59. 



Similar in size, arrangement of spicules and color to JR. aglaophe- 

 nice, but never living coiled around Hydroids, but always on Sertu- 

 lariella polyzonias. In rest it is always at length along a branch, 

 the head a little raised and the cloaca half open. The cloacal re- 



