492 F- W. GAMBLE. 



Habitat. — One specimen dredged in 12 fms.^ Plymouth 

 Sound (F.W.G.). 



57. ? AuTOMOLos oPHiocEPHALus (O. Schmidt), PI. XL, fig. 18. 



1861. MoNOCELis OPHIOCEPHALA, Schmidt (34). 

 1882. AuTOMOLOS OPHIOCEPHALUS, V. Graff (53). 



Length 1*5 mm. Body of a pink colour, very slender, 

 elongate, the anterior end broader than the rest of the body, 

 and separated off by a slight constriction. The hinder end 

 when freely moving tapers gradually to a point. During con- 

 traction it becomes thickened and widened. PI age Use appear 

 to be absent. The rods are accumulated in packets chiefly at 

 the two extremities. Individual rhabdites are longer at the 

 anterior, shorter at the posterior end — exactly the reverse of 

 the case in A. hamatus, Jensen. Strong adhesive cells occur 

 on the " tail.^' The pharynx is placed about the commence- 

 ment of the posterior third. When extended the free end 

 expands, the base becoming constricted. The intestine, which 

 contains pinkish granules, is markedly sacculated. The pouches 

 numbered about twenty on each side, and in compression- 

 preparations appeared to be fairly definitely paired. Between 

 successive gut-sacs were muscular dissepiments. Ocular pig- 

 ment is absent. Testes occupy spaces in front and at the sides 

 of the pharynx. The vasa deferentia lead to a vesicula 

 seminalis, and this opens, along with the accessory glands, 

 into the penis, a pyriform muscular organ, similar in position 

 and form to that of A. hamatus. The pair of germaria lie at 

 the base of the pharynx, the yolk -glands accompanying the 

 gut-pouches and lying between them. The oviducts were 

 not observed. 



Habitat. — Dredged in twenty fms., Plymouth Sound 

 rP. W.G.). 



Distribution. — Corfu (O. Schmidt). 



Schmidt's description of this species docs not agree in all 

 points with the diasjnosis just given of my own specimen. The 

 differences consist in the following details : the presence of 



