Duhlin Microscopical Cluh. 143 



somewliat densely filling up the mass — one to which he had never 

 drawn attention, as its characteristics were found very difficult to 

 determine ; but it seemed certain that neither of the organisms 

 here drawn attention to, nor, judging from Mr. Bolton's sketches, 

 could his Heliozoon, be considered identical therewith. 



Undescribed Epidermal Gland in Chiton. — Prof. Haddon exhi- 

 bited transverse sections of Chiton {Trachydermon) ruber (Linn.), 

 showing an undescribed epidermal gland at the posterior end of the 

 animal on each side beyond the gills, which it is proposed to call 

 the fenestral gland. 



Development of Spicules in Geodia Barretti. — Prof. SoUas showed 

 slices of Geodia Barretti in which the development of the globular 

 spicules within a mother-cell could be traced through all the 

 stages. 



Cell-division in a problematic Ch'oococeaceous Alga. — Prof. M'Nab 

 exhibited a slide of the Chroococcaceous alga from the wall of the 

 stove at Glasnevin which contained the Desmids formerly exhibited. 

 The material had been kept for about twelve months in a corked 

 bottle, and the cells were dividing first into two and two, that is 

 four cells placed linearly, and next into two transversely, so as to 

 form two rows of four cells : all the cells remained in the gelatinous 

 investment. The result of the division was the formation of eight 

 very minute cells, whose further development was still under obser- 

 vation. 



June 19, 1884. 



Torrubia militaris new to Ireland. — Mr. Pim showed a section 

 through the receptacle of Torrubia militaris which he had recently 

 found growing (as is usual) from the body of a grub in Powerscourt 

 demesne, near the Waterfall, being its first record, as far as he 

 knew, in Ireland. The long and flexuous asci containing filiform 

 sporidia are very striking. 



Alcyonella fungosa exhibited. — Prof. Haddon exhibited Alcyonella 

 fungosa in a living condition, 



Archerina Boltoni^ Lankester, exhibited in a living condition. — 

 Mr. Archer presented for examination a group of four individuals of 

 the new Sarcodine discovered by Mr. Bolton, of Birmingham, a 

 specimen of which he had failed to find in the former gathering 

 shown to the Club at last meeting. Here it was now "in the 

 flesh," and a veritable novelty, which Prof. Lankester had done 

 Mr. Archer and Mr. Bolton jointly the honour to designate, at least 

 pro tempore., as Archerina Boltoni. As the group now under view 

 showed, this is a more or less gregarious form, extremely minute 



11* 



