ON THE ANGUILLULID^. 169 



accessory pieces 9^" long. In mid-ventral region, above anus, is a linear series of iive 

 highly refractile roundish bodies, similar in kind to those of C. nucUcajjitata. 



Sab. Found swimming near the surface of the water in a small aquarium containing 

 weeds from tide-pools, Falmouth. ' 



4. C. c^CA, n. sp. (Plate XIII. figs. 239-241.) 

 Female, length 3^5^", breadth 5^". 



External Characters. — Body tapering considerably at both extremities. Head trun- 

 cate, provided with four setse directed forwards. Integument having well-marked trans- 

 verse striae at ^q\qq " apart, and with the appearance of longitudinal also. 



Pharyngeal cavity small, indistinct ; apophyses three. . (Esophagus about yth of total 

 length ; posterior swelling distinct. Intestine sparsely and irregularly covered with fat- 

 granules of large size. Anus 2^" from posterior extremity. Vulva about the middle 

 of body. Ocelli wanting. 



Male, length -^" , breadth -^^' . 



Anus asV' fi'oi'n posterior extremity. Spicules slender, curved, yoWo" lo^g > acces- 

 sory p)ieces two, nearly half as long. 



Hab. Marine surface-mud from estuary, Falmouth. 



5. C. FiLiFORMis, n. sp. (Plate XIII. figs. 242-244.) 

 Female, length 3^", breadth e-g-g". 



External Characters. — Body very slender, tapering most notably towards extremities, 

 - so as to appear somewhat spindle-shaped. Head bluntly rounded, provided with 2-4 

 setse. Integument with transverse strise Tbhoo" apart. 



Fharyncjeal cavity indistinct ; length of apophyses airoo"- (Esophagus about ^th of 

 total length; posterior swelling not very distinct. Intestine thinly covered with irre- 

 gularly dis2)osed hepatic particles. Anus xIt ' ^^om. posterior extremity. Vulva slightly 

 posterior to middle of body. Ocelli two, reddish brown, T^to' froni anterior extremity. 



Male, longer, though more slender, than female ; length -^", breadth xoVo"- 



Anus xia^" from posterior extremity. Spicules rather short, curved, ttwq" ^^ length. 

 Accessory pieces about half as long. 



Sab. Small green sea-weeds from tide-pools, Falmouth. 



6. C. SABELLOiDES, n. sp. (Plate XIII. figs. 245, 246.) 

 Male, length -3-/', breadth -§^". 



External Characters. — Body tapering very slightly anteriorly, but in usual manner 

 at posterior extremity. Head rounded, provided with four moderately long setae. In- 

 tegument with transverse striae xswo" apart ; longitudinal not recognizable. 



Pharyngeal cavity indistinct ; apophyses about s^Ts" in length. (Esophagus about ^th 

 of total length ; posterior third forming an elongated terminal swelling. Intestine thinly 

 covered with hepatic granules. Anus -^as" fi'om posterior extremity. Spicules slightly 

 curved, two " long. Accessory pieces r^g-e" long. 



Female, not seen. 



Sab. Marine surface-mud, Falmouth. Found in the mud, moving about with a tube 



VOL. XXV. z 



