ON THE ANGUILLULID-^. 133 



1. S. LONGicoLLis, n. sp. (Plate XI. figs. 119-122.) 

 Female, length \", breadth axo"- 



External Characters. — Body smooth ; anterior extremity tapering much, long, and 

 narrow; posterior tapering more quickly. Caudal sucker well developed. Head trun- 

 cate, naked. Integument with an appearance of longitudinal markings, ewo " apart. 



Pharijnrjeal cavitrj somewhat fiddle-shaped, length -^i' ■> having funnel and three cir- 

 cular markings. Two circular, highly refracting, colourless bodies (on oesophagus ?) 

 near termination of pharyngeal cavity. (Esophagus ^th of total length. Intestinal cells 

 large, from tooo" to "s oo" i^ diameter, containing an abundance of dark fawn-coloured 

 granules, sometimes varying in shade in contiguous cells, and these themselves often 

 very irregularly disposed. Anus xkrs" from posterior extremity. Vulva slightly poste- 

 rior to middle of body. Ocelli none. Glandular system around middle third of oesophagus 

 highly developed, and also at posterior extremity behind anus. Excretory ventral duct 

 opening at 3^" from anterior extremity. 



Male, slightly larger than female. 



Anus x^" from posterior extremity. Spicules long and narrow, very slightly curved, 

 length yW- 



Hab. Erom tide-pools, on CladopJiora rupestris and other fine green and brown weeds 

 on which Diatomaceaj abound, Falmouth and Brighton. 



2. S. TENTJICOLLIS. 



Enoplus tenuicnllis, Eberth, Untersuch. iiber Nematoden, 1863, p. 41, tab. iv. fig. 16, tab. v. figs. 1 & 2. 



" Korper fast gerade, cylindrisch, gegen beide Enden ziemlich gleich stark ver- 

 schmalert. Hinterende bei dem Weibchen gerade, bei dem Mannchen eingeroUt. Kopf 

 quer abgestutzt. Schwanz mit einer grosseren Papille versehen." 



"Lange des Weibchens 6 Mm., Breite 0"15 Mm. 



" Lange des Mannchens 4-5 Mm., Breite 0-09 Mm. 



"Oesophaguslange=3^ der Korperlange " ^ 



3. S. vrviPAKA, n. sp. (Plate XL figs. 123-125.) 

 Female, length y^", breadth xgr"- 



External Characters. — Body tapering considerably at extremities, especially at pos- 

 terior, which is long, filiform, and terminates with a minute sucker. Head slender, 

 rounded, provided with a circlet of 6-8 spreading seta^. Integument with longitudinal 

 markings about toooo" apart. 



Pharyngeal cavity of a somewhat elongated-oval shape, containing no funnel or cir- 

 cular markings (?), yeee" in length. (Esophagus about ^th of total length, gradually 

 widening posteriorly, and embraced by a glandular ring at about its middle. Intestine 

 irregularly and rather sparsely covered with somewhat large fat-particles. Anus yiy" 

 from posterior extremity. Vulva in centre of body. Uterus bifid. Segments symme- 

 trical. Viviparous. Excretory ventral gland ? 



' Unless specified to the contrary, Eberth's species have been found at Nizza, amongst Algse and Sertulariee. In 

 the description of this, as well as other species discovered by him, I have merely given the external characters. 

 In his memoir, in addition to beautiful coloured drawings of each species, will be found lengthy descriptions, including 

 many interesting and accurate anatomical details. It should be consulted by all interested in this subject. 



