82 PRONEOMENIA HAWAIIENSIS. 



turn in the duct. The cilia with whicli this part of the tube is provided are 

 probably operative in driving the sex products toward the exterior. There are 

 no evidences that they ever form a groove such as has been described in a few 

 other species, and it must rather be supposed that both sex products travel much 

 the same path. At the anterior sharp turn of the coelomoduct the ciliated ridge 

 passes, so far as may be judged from sections, into a ciliated patch that occupies 

 the anterior wall of the canal, and extends a short distance down the posteriorly 

 directed section, corresponding to the shell gland in other Solenogastres. This 

 patch, roughly circular in outline, is composed of low columnar cells provided with 

 very long, powerful cilia. Posteriorly the cells of this region blend with others 

 of the same general appearance, but without cilia, and filled with an abundant 

 secretion in several cases in the act of being discharged. This glandular area 

 is limited to a narrow girdle encircUng the duct, and is sharply defined from the 

 succeeding portions of the canal, whose walls are developed into numerous folds 

 obscure at first but in the neighborhood of the cloaca of considerable height. 

 The cells in all of this corrugated section, the shell gland of other Neomeniina, 

 vary in height according to the size of the fold of which they form a part, but all 

 agree in being relatively slender with central dense nuclei external to which the 

 cytoplasm is filled with some glandular product of yellow tint. In the terminal 

 section of the cloacal passage this substance is present in considerable quantities 

 and at various points has made its escape in an unchanged condition into the 

 neighboring duct. 



Proneomenia hawaiiensis, sp. no v. 



This species is represented by three individuals, one perfect and two muti- 

 lated. The first was dredged in the neighborhood of Kapuai Point ofT the west- 

 ern extremity of Kauai Island (Sta. 4001) at a depth of 230-277 fath. where the 

 bottom consisted of coarse sand and the temperature was 44.3° F. The imperfect 

 specimens were taken in the vicinity of Mokuhooniki Islet (Mokuo Niki), a 

 small island close to the eastern border of Molokai Island (Sta. 3864) at a 

 depth of 163-198 fath. where the temperature was 57.5° F. and the bottom con- 

 sisted of shells and fine volcanic sand. All the specimens came in unattached 

 and without any food in the digestive tract so that nothing is known of their 

 mode of life. 



The perfect individual measured 36 mm. in length and 2 in average diameter, 

 and this proportion of 1 : 18 appeared to be the same in the imperfect specimens. 

 The body (Plate 3, fig. 10) is elongated, tapering gently from the forward to 

 the hinder end, and is slightly elliptical in cross section. A rusty red incrusta- 



