134 MR. H. CHARLTON BASTIAN'S MONOGRAPH 



Male, length iV", breadth ^sko"- 



Anus XB?" from posterior extremity. Spicules -^" long, solitary, very slender, and 

 slightly curved. 



Hub. Fine surface-mud from marine estuary, Falmouth. 



4. S. CRN ATA. 



Enojilus ornatus, Eberth, Untersuch. iiber Nematod. 1863, p. 40, tab. iv. figs. 13-15, tab. v. figs. 5 & 6. 



" Korper fadenformig, gegen beide Enden verschmalert. Vorderleib gerade, Hinterleib 

 bei beiden Geschlechtern eingerollt, starker bei dem Miinnchen als bei dem Weibchen. 

 Kopf fast quer abgestutzt, Schwanz stumpfspitz mit feiner terminalen Oeffnung. 

 Hinter dem Munde ist der Korper leicht eingeschniirt. 



" Liinge des Weibchens 4 Mm., Breite 0'125 Mm. 



" Lange des Miinnchens 5 Mm., Breite 0-1 Mm. 



" Verhaltniss der Oesophaguslange zur Korperliinge wie 1 : 4." 



5. S. BARB ATA. « 



Urolabes barhata. Carter, Ann. of Nat. Hist. ser. 3, vol. iv. (1859) p. 43, pi. iii. fig. 32. 



" Female. Body the same as the last ( TI. ocellata), but much longer. Head furnished 

 with four linear, short cirri. Tail short, somewhat curved, furnished with a short, 

 pointed, digital termination. Mouth and anus the same. Vulva situated much pos- 

 teriorly to the middle of the body, about the junction of the middle with the anterior 

 third of the posterior half." 



" Alimentary canal the same as in the foregoing species, but the intestinal sheath 

 terminating less abruptly upon the commencement of the rectum. Hepatic organ the 

 same. Organs of generation double, occupying the middle part of the body ; their form 

 undetermined. Ocelli at some distance from the head, of the same colour as in TI. 

 infrequens." 



" Size yth inch long, and -g^ih. of an inch broad." 



" Male, the same as the female ; but with a large, thick, curved tail, obtuse at the extre- 

 mity, tuberculated in its inner curvature, and furnished on each side with a row of short 

 setae, extending from above the anus towards the tip ; also three or four setaj on the 

 outer curvature. Testes and penis the same as in the foregoing species ; form of the 

 testes undetermined." 



Sab. " Silty clots of Oscillatoria floating in the salt-water main drain of the town of 

 Bombay." 



15. ONCHOLAIMUS, Dujardin. 

 Enoplus, Diesing & M. Schultze. 

 Gen. Char. Body often elongated; posterior extremity blunt- or sharp-pointed. Caudal 

 sucker variable, sometimes well developed, with 2 or 3 distinct sucker-tubes. Integu- 

 ment plain or with longitudinal markings ; cephalic setae generally present, and 

 occasionally a few scattered over other parts of the body ; cephalic papillae wanting ; 

 integumental pores most distinct in mid-dorsal and ventral regions. Fhari/ngeal 

 caclty large, ovoid, bounded by horny parietes, and having three longitudinal, slightly 



