170 MR. H. CHARLTON BASTIAN'S MONOGRAPH 



like that of a Sabella, composed of the finest particles of sand and DiatomacecB agglu- 

 tinated together. Tube longer than worm, but embracing its body pretty closely. 



7. C. PAPLLLATA, n. sp. (Plate XIII. figs. 247, 248.) 

 Hale, length ^s", breadth 3-^3". 



External Characters. — Body tapering slightly anteriorly ; posterior extremity rather 

 narrower, and more elongated than usual. Head rounded, provided with two (upper and 

 lower) horn-like papillae in front, and four rounded ones (crucially arranged) behind 

 them; also four setae arising close to these posterior papillae. Integument brittle, 

 clouded anteriorly, having well-marked transverse striae -fooo" apart, and longitudinal 

 ones at a distance of 3 0^00 "• 



pharyngeal cavity and apophyses (Esophagus |^th of total length, slightly 



swoUen posterioi'ly. Intestine moderately well covered with light-coloured hepatic par- 

 ticles. Anus xia" from posterior extremity ; posterior boundary of anal cleft rather 

 prominent, and containing a small horny body within its substance. Spicules curved, 

 rather narrower at upper extremities, yW loi^g; accessory jneces strong, hook -like, 

 oYb" long. Ocelli wanting. Excretory ventral duct rather narrow ; opening opposite 

 middle of oesophagus. 



Female, not seen. 



Sab. Marine surface-mud from estuary, Falmouth. 



The natiu-e of the head and pharynx in this species differs somewhat from the strict 

 type of this genus, though, in other important points, the characters are identical. 



8. C. BIOCULATA. 



Rhabdiiis bioculata, M. Schultze. — V. Carus's Icones Zootom. tab. viii. 2. 



Enoplus bidentatus, Diesing, Sitzungs. der Kais. Akad. der Wissen. xlii. Band (1860), p. 625. 



No description. 



9. C. OCELLATA. 



Urolabes ocellata. Carter, Ann. of Nat. Hist. ser. 3. vol. iv. p. 4.3. 

 Phanoyletie ocellata, Eberth, Unlers. iiber Nemat. p. 21, pi. iii. fig. 31. 



" Female, linear, cylindrical, unstriated ', oceUated, diminishing gradually towards 

 the head, which is obtuse and provided with four short, linear cirri ; also diminishing 

 gradually towards the tail, which is short, somewhat curved, and furnished with a 

 pointed digital termination. Mouth, vulva 2, and anus situated as in the foregoing 

 species. 



" Alimentary canal the same, but with the oesophageal sheaths more bulbous poste- 

 riorly, and no globular dilatation of the intestinal sheath posterior to it." 



" Size. About ^nd of an inch long." 



" Male, the same as the female, with the exception of the difference in the generative 

 organs." 



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

 Bombay." 



' Perhaps striae fiae, and riot recognized. " In middle of body. 



