454 SUMMARY OF CURRENT RESEARCHES RELATING TO 



connecting region between scolex and strobila shows no trace of joints. 

 The very short and narrow proglottides are dovetailed in a remarkable 

 fashion. The longitudinal musculature is greatly developed. The 

 gonads are described at length. The yolk-nuclei seem to be due to the 

 plasma, not to the nucleus. 



New Swiss Terrestrial Planarians.* — 0. Fuhrmann describes two 

 new species found by J. Carl on Monte Bre, Rhynchodemiis carli and 

 R. diorchis, the latter being especially noteworthy in having only one 

 pair of testes. This number has not been previously observed in any 

 terrestrial Planarian. Seven European species of terrestrial Planarians 

 were recorded by von Graff in his monograph. The occurrence of two 

 new forms on one hill suggests that there are many more to be found. 



Incertae Sedis. 



New Invertebrate Type.f — Maurice Gaullery gives a preliminary 

 account of a worm-like type of unknown affinities, for which he proposes 

 the name Siboglinurn. The animal lives in a yellowish filiform tube, 

 100-120 mm. in length, - 12-0 "3 mm. in diani., with regular annula- 

 tions. The animal itself was several centimetres in length, but no well- 

 preserved specimen was obtained. There is a long unpaired tentacle, 

 twisted in a spiral, bearing some lateral pinnules, and containing two 

 vessels. Not far from the anterior end of the animal there is a strongly 

 muscular region ; the ectoderm is very glandular ; there is a fibrillar 

 strand, possibly nervous, and an internal cavity. Posteriorly there are 

 very large ectodermic glands. The cavity is surrounded by muscle, and 

 in two cases there were traces of ova. There was no evidence of mouth 

 or alimentary canal. 



Ccelentera. 



Minute Structure of Veretillum.J — Albert Niedermayer has made a 

 histological study of Veretillum cynomoriwn, a common Pennatulid aud 

 apparently rather a primitive type. The ectoderm consists mainly of 

 very narrow and rather high cylindrical cells, some with muscular roots. 

 There are also glandular, sensory, and nervous elements. A cuticular 

 " crusta " is perhaps an indication of ciliated cells. The endoderm 

 consists mostly of small roundish cells with spherical nuclei, with hints 

 of cilia, with some transverse muscular roots at right angles to those of 

 the ectoderm. No zoochlorellas were to be seen. The ectoderm is 

 extraordinarily rich in glandular cells of various kinds, some of which 

 are doubtless concerned in luminescence. 



The tentacles show large stinging cells, grouped in batteries, an 

 ectodermic nerve-plexus on the oral surface, a well developed longi- 

 tudinal and transverse musculature, and very minute spherical or oval 

 spicules. The oral disk shows several layers of epithelial cells. The 



* Rev. Suisse Zool., xxii. (1914) pp. 435-56 (1 pi.). 

 t Comptes Rendus, clviii. (1914) pp. 2014-17 (8 figs.). 

 X Zeitschr. wiss. Zool., cix. (1914) pp. 531-90 (2 pis.). 



