GIO RECORD OF CURRENT RESEARCHES RELATING TO 



backward ; from the lower surface a delicate nerve goes to tlie ventral 

 surface of the oral sucker, while there are also two ventral longitudinal 

 nerves which, soon after their origin, give off a branch which takes 

 a dorsal direction. Very similar arrangements are to be found in 

 J), hepaticum, the results of his observations on which, by means of 

 sections, the author carefully describes. 



In conclusion, the author states that, with regard to the large cells, 

 principally found in the suckers of these creatures, he is not able to 

 afiirm that they have any connection with the nerve-fibres which are 

 distributed to the same parts. But he is of opinion that they are 

 homologous with the cells of similar character in Tristomum, and he 

 thinks that they should be regarded as ganglionic cells. 



New Turbellarian.* — Dr. Arnold Lang describes a new parasitic 

 Ehabdocoele Turbellarian, but without giving it any name ; it seems, 

 however, to be closely allied to Graffilla muricicola ; it is found in 

 numbers on the foot of Tetliys, but hardly appears to reside there 

 jiermancntly. Spindle-shaped when extended, and whitish in colour, 

 they are almost completely dense ; little even can be made out when 

 they are compressed. The epithelium of the integument is ciliated, 

 and the cells are polygonal ; no sagittocysts are developed, but here 

 and there there are pores for the tegumentary glands; below the 

 integument there is a rudimentary muscular layer, which is so feebly 

 developed that it can only be detected in very thin sections ; in this 

 region there are a large number of unicellular pyriform glands, which 

 are specially developed in the anterior region of the ventral surface. 

 The pharynx, and its musculature, are very feebly developed, and the 

 former appears to be devoid of a sheath. The intestine, which is 

 aproctous, forms the greater part of the animal ; its lumen varies in 

 width owing to the development of inwardly projecting processes, and 

 its walls are formed by very long tubular cells, distinctly separated from 

 one another, and, as it seems, inserted directly into the integument. 

 No peripheral nerves, special sensory organs, or water-vessels were 

 detected. The female organs were well developed, but in no specimen 

 was the author able to find the male glands in anything but a rudi- 

 mentary condition. 



New Nemerteans.l — Dr. Hubrecht, in a first appendix to a paper 

 already noticed, :j: points out that among the Palteonemertini we- 

 may either find the system of resj)iratory furrows represented by a 

 number of small grooves (Polia), or there may be only a simple trans- 

 verse furrow {Ceplialotrix), or no furrow at all. He then describes a 

 new species, Carinella inexpectata, which seems to be intermediate 

 between the two forms with simple or compound grooves ; for here we 

 have to do with a transverse groove, provided with a set of small 

 secondary grooves, very much as in Polia ; from which, however, it 

 differs, and agrees with the simpler forms in having no third pair of 

 lobes to its cephalic ganglion. The other new species described 

 belongs to the genus Cerebratulus, and is dedicated to Dr. Eisig, of 



* 'Mitth. Zool. Stat. Ncapel,' ii. (1880) p. 107. 



t ' Notes R. Zool. Mus. Netherlands,' ii. (1880) p. 93. J Ante, p. 438. 



