THE ENTEROPNEUSTA. 
By R. C. Punnett, M.A., Fellow of Gonville and Caius College, and Demonstrator 
of Comparative Anatomy in the University of Cambridge. 
(With Plates XXXVIIL—XLVI. and Text-figs, 120, 121.) 
CONTENTS. 
Introduction, p. 631. Systematic account, p. 631. Some anatomical points, (1) the pygochord, 
p. 659, (2) the lateral septa, p. 659, (3) the branchiae, p. 660, The formation of the gonads, 
p. 660. Variation in Ptychodera flava, p. 662. Metamerism in the Enteropneusta, p. 669. 
INTRODUCTION. 
THE collection of Enteropneusta brought together by Mr Stanley Gardiner is the most 
extensive hitherto made in any single locality, not only in the variety of forms, but also in 
point of numbers. To Mr Gardiner’s recognition of the importance of collecting considerable 
numbers and to his perseverance and zeal I owe this opportunity of making some 
observations on the variation shewn by the genus Ptychodera, a field hitherto unexplored. 
The material is on the whole excellently preserved, and I would here express my thanks 
to Mr Gardiner for entrusting to me so interesting a collection, I am also greatly indebted 
to Mr Forster Cooper for the coloured sketches from life which form the first plate to this 
paper. With the account of the Laccadive and Maldive forms I have incorporated a descrip- 
tion of an interesting new form kindly placed in my hands by Mr Crossland, who collected 
it in Zanzibar. Many regenerating specimens occurred in Mr Gardiner’s collection. These 
I hope to make the subject of a subsequent paper. 
SYSTEMATIC ACCOUNT: 
Fam. 1. Harrimaniidae. 
(Not represented. ) 
Fam. 2. Glandicipitidae. 
PAGE 
Spengelia porosa, WILLEY, 1898 ¢ : : : : 5 : 6 . 633 
Sp. maldivensis, n. sp. 
Collar relatively very short with cornua of nuchal skeleton extending to 
extreme hind end. Dorsal septum throughout collar. Medium proboscis septum 
very short. Dermal pits very small. No median gonads in post-branchial region. 635 
1 The classification adopted is that recently revised by Spengel. 
81—2 
