186 MR. H. FAEQUHAK OS NEW ZEALAND ECHINODEEMS. 



EXPLANATION OF PLATE 12. 



Fig. 1. Limncea. Diagram showing relative position and size of cells and 



fibres in the ganglia, g.a., Abdominal ganglion ; g.b., buccal ganglion ; 



g.c, cerebral ganglion ; g.pd., pedal ganglion ; g.2}l; pleural ganglion ; 



g.v., visceral ganglion. 

 Fig. 2. Aplysia. Section across buccal ganglia, built up from several methylene- 



blue preparations. 

 Figs. 3, 4, 5, & 6. Aplysia. Diiferent types of uni-, bi-, and multipolar cells 



from the pleural ganglia. In figs. 3 a and 4 the axis process was 



traced into a nerve. 

 Fig. 7. A2olysia. Section across visceral ganglia, showing — a, group of small 



cells ; b, ordinary cells of ganglia ; c, branching fibre from nerve ; 



d, nerve passing over ganglion. 

 Fig. 8. Aplysia. Section of general epidermis showing — c and c', sensory cells; 



pi., subepithelial nerve-plexus. 

 Fig. 9. Aplysia. Section of osphradium. n, Nerve ; g, ganglion ; a k,h, sensory 



cells and their processes, and at c one of the latter branching. 

 Fig. 10. Aplysia. Osphradial epithelium, with group of sensory cells showing 



mode of termination. 



A Contribution to the History of" New Zealand Ecljinoderms. 

 By H. Fakquhak. (Communicated byT. W. Kirk, F.L.S., 

 GrOA^ernment Biologist, Department o£ Agriculture, New 

 Zealand.) 



[Read 4th February, 1897.] 



(Plates 13 & 14.) 



The material from which the following notes have been drawn 

 up consists principally of a collection of Echiuoderms made at 

 Nelson by Mr. E. LuMns, and a small but exceedingly interesting 

 collection brought from Eaoul or Sunday Island by Mr. A. A. 

 S. Danby, who was a passenger in the Grovernment steamer 

 ' Hinemoa ' on her last annual trip to the Kermadecs. My 

 thants are due to these two gentlemen for their kindness in 

 placing these valuable collections in my hands. 



I give an account in this place of the collection from the 

 Kermadec Islands, although the marine fauna of these islands 

 belongs rather to the tropical division of the Australian Eegiou 

 than to New Zealand. The islands can, however, be most con- 

 veniently worked from New Zealand, as they now form j)art of 

 this Colony, having been annexed in 18S7. 



I 



