IV CONTENTS. 



Page 



IX. The last Discoveries in the extreme North. By Oswald 

 Heer 81 



X. On the Existence of distinct Larval and Sexual Forms in the 

 Gemmiparous Oligochsetous Worms. By E. Ray Lankesteb, B.A. 

 Oxon 102 



XI. On the early Stages in the Development of Phyllodoce macu- 

 lata, Johnston. By W. C. M'Intosh, M.D., F.R.S.E., FX.S. 

 (Plate VI.) ". 104 



XII. Descriptions of five new Species of Birds from Queensland, 

 Australia ; and a new Humming-bird from the Bahamas. By John 

 Gould, F.R.S. &c 108 



XIII. On the Depths of the Sea. By Prof. WY^'TLLE Thomson, 

 LL.D., F.R.S 112 



XIV. Observations on the Calamites and Asterophyllites. By M. 

 Grand'Euby , 124 



XV. Observations on the Ancient Fauna of the Mascarene Islands. 



By M. Alphonse Mxlne-Edwards 129 



Proceedings of the Royal Society 132 



On the Origin of the name " Penguin," by Alfred Newton, M.A. &c. ; 

 On the Structure of the Flower of the Oraminece, the Functions 

 of the Organs of which it is composed, and the Phenomena 

 which accompany the act of Fecundation, by M. Bidard ; On a 

 Tree -Frog in New Granada which secretes a Poison employed 

 by the Indians to poison their Arrows, by J. Escobar; An 

 Hermaphrodite Nemertean fi-om the Mediterranean, by A. F. 

 Marion ; Note on the Crustacea which live parasitically in 

 Ascidia in the Mediterranean, by R. Buchholz ; On the Ccecili<e, 

 by M. F. Leydig ; On the Spire of Valuta Thatcheri, by Prof. 

 Frederick M'Coy ; On two new Species of Gyrodus^ by Sir Philip 

 de Malpas Grey Egerton, Bart., M.P., F.R.S., V.P.G.S. . . 133—140 



NUMBER XXI, 



XVI. Notes on the Fertilization of Orchids. By Charles 

 Darwin, M.A., F.R.S., &c 141 



XVII. Note on Hyponome Sarsi, a recent Cystidean. By S. 

 LovEN 159 



XVIII. Descriptions of a remarkable new Jellyfish and two Acti- 

 nians from the Coast of Maine. Bv A. E. Verrill 160 



