ON A NE\V SPKC1KS OF SOLEROCHEILUS. 



299 



nuchal organ, which, when everted, forms a sausage-shaped mass of considerable 

 size (see fig. 7). 



The peristomium is ;i single ach;etous ring, incomplete ventrally. 

 The first two or three ch;etiferous segments are usually lii-anmilnte, but the re- 

 maining segments, except a few of those last formed, are subdivided into four rings. 

 The stronger, curved dia'tie ("acicula" of SAINT-JOSEPH) on cadi side of the first, 



B 



TEXT-FIO. 3. A, Pi, 0, D. Ch:i-tic from the first notopodium of a specimen of Sclerorhfilus 



niiitii/iis, l'S'5 mm. long. (x200.) 



B'. A clurta which hud mil i;ome into use, from tlif lirst notopodium of a 

 s|irnimcn 11 mm. long. ( x300.) 



duutiferous segment are undoubtedly part of the armature of the notopodium, and 

 form a portion of the anterior series of ch;rta>. The following is a brief account of 

 the chief eha-tal characters resulting from a stud}' of specimens I I to 18'5 mm. long. 



The first notopodium contains three kinds of chietse : 



(i) Strong and almost straight eha-ta', which taper distally to a fine point 

 (text-fig. 3, A). Kaidi of these cha'ta- is about '."> mm. in length and I f>-2(V in maximum 

 diameter, ami in all the specimens examined only the tips * of these chsetse pi'oject 



* Nut nidri' th.'Ui alunil f| i| nun. 

 (ROY. SOC. KOIN. TRAMS., VOL. I., 411.) 



