412 



G. WYNHOFF. 



forme deux lignes separees par la bande blanche dorsale " (Joubin. 

 1890. " Archives de Zool. exper. Ser. II, T. VIII, p. 495). 



As far as I can judge from the description and the figures given, 

 T. annnlatus, Montagu, which is doubtless the same species which I 

 found at Plymouth, agrees completely with C. aragoi, Jouhin, in external 

 features. However, we cannot at present consider the species identical, 

 as their anatomy is not at all the same. This seems to be a case like 

 the one described by Bergendal for CarincUa linearis and C. groen- 

 landica. Neither do the Plymouth specimens agree with the descrip- 

 tion and figures of Burger's species in the Naples monograph. 



C. annulata, Bergendal, however, seems to exhibit the same internal 

 structure as the Plymouth specimen ; but this species differs externally 

 from C. aragoi as Bergendal states. This complicates the question still 

 more. Only the study of sections of all these Nemerteans can throw 

 more light on this interesting question. At any rate there can be 

 little doubt as to the identity of T. annulatus {Mont.) with the 

 Nemertine described above. 



7. Tubulanus albocapitatus. Nov. spec. 

 Locality : Eame-Eddystone Grounds. 



In 3 different dredgings, each time one specimen of this 

 small Nemertean, which can easily be mistaken for a young 

 T. annulatus, was collected. On closer inspection it differs 

 considerably from that form. A complete individual had a 

 length of 1| cm. and was I mm. broad in the oesophageal 

 region. The head is not sharply separated from the body, 

 nor is it much broader. Pigment spots are absent. The 

 perfectly white head is followed by a brown-red belt of 

 the same breadth, which is the darkest part of the whole 

 body. A yellow pigment is distributed all over this 

 region. The cephalic furrows are situated in this ring; 

 they are rather deep and reach half-way to the dor- 

 sum ; they are not lined with white or yellow, as is 

 the case in T. anmdatus, and are quite differently 

 shaped. The first ' circular white line separates this region from the 

 body. The median dorsal line, which is white too, passes through this 

 belt into the dark region described above, but does not reach the white 

 head. At both sides of this median longitudinal line, separated from 

 it by a translucent region, a reddish-brown stripe of a fainter tint is 

 present. These stripes do not even reach the lateral lines, as a trans- 

 parent region is developed between them too ; the white pigment 

 patches, which are dispersed at the sides, constitute a very incon- 

 spicuous and incomplete lateral line. The ventral side is also trans- 



Fig. 1. 



Tubulanus 

 albocapitatus. 



