TRANSACTIONS OF THE LINNEAN SOCIETY. 



THE PERCY SLADEN TRUST EXPEDITION 



TO 



THE INDIAN OCEAN IN 1905, 



UNDER THE LEADERSHIP OF 



Mr. J. STANLEY GARDINER. 



VOLUME II. 



No. I. -ON SOME NEMERTEANS EROM THE EASTERN INDIAN OCEAN. 



By R. C. PuNNETT, 31. A., and C. Eorster Cooper, M.A. 



(^Communicated by J. Stanley Gardiner, M.A., F.R.S., F.L.S.) 



(Plates 1 & 2.) 



Read 5th November, 1908. 



Introduction. 



In the following pages some account is given of 20 species of Nemerteans from the 

 Eastern Indian Ocean. In addition to those collected by the Percy Sladen Expedition, 

 we have been able to examine a collection made by Mr. Cyril Crossland at and near 

 Zanzibar, and also a few procured by Professor Herdman fx-om Ceylon. To these two 

 gentlemen we desire to express our thanks. Other specimens reached us besides those 

 described below, but owing to their imperfect condition or to their unsatisfactory 

 preservation we have not included them in our account. It is to be regretted that in no 

 case were observations made on the colour of the living worm. We have endeavoured, 

 so far as is possible, to remedy this defect by coloured drawings of the preserved material, 

 though we realise that these are but a poor substitute for sketches from life. 



Like that of many groups, the nomenclature of the Nemertea has suffered frequent 

 vicissitudes during the recent priority quest, and once familiar genera are now disguised 

 by unfamiliar terms. As we have accepted the system given by Burger in ' Das 

 Tierreich' (1904) we have not considered it necessary to set out the literature and 

 synonyms previous to 1900. Those who wish to ascertain why Carinella and Ettpolia 

 have given place to Tubulanus and Baseodiscm will find in that indispensable volume 

 reasons which are doubtless good. 



SECOND SERIES. — ZOOLOGY, VOL. XIII. 1 



