350 PROCEEUINt.S OF SOCIEIIKS. 



work on the " Hj'droid " Zoophytes, stating that he had met witli 

 it only at Oban. Mr. Grant met \vit!i it at llowlh. It is minute, 

 with short beaded stem and long tabular capsule. 



Docidium nodosum, American example, exhibited. — Mr. Archer 

 showed an example of Docidum nodosum occurring in a small 

 collection labelled as male at New Jersey, in America, and for 

 some years lying in the Herbarium of Trinity College, and for 

 the examination of which Mr. Archer was indebted to Professor 

 Perceval Wright. For a long time this appeared to be a purely 

 American species, but Mr. Archer had some time ago made its 

 acquaintance at Comemara, but he had seen two examples only. 

 It had since been gathered in Sweden. It is an unmistakable, 

 fine, bold, and handsome species. 



Geplialic Armature of Clio horealis, exhibited. — Dr. Mcjss 

 showed the cephalic armature of Clio horealis, and some beautiful 

 original drawings in illustration, showing also the entire animal 

 as it appear.s in the act of swimming. 



New Species of Craspedodisciis, G. Febigeri, exhibited. — Eev. 

 Eugene O'Meara exhibited a new species of Craspedodiscus from 

 the Nottingham depo^sit. The slide was sent by Mr. Kebiger of 

 Wilaiingtou, U.S., through Mr. Habenshaw of New York. Mr. 

 Pebiger doubtfully assigns the form to the genus Crasp dodiscus, 

 but close examination removes all doubt :is to its proper place. 

 Like Crasjjedodiscus ele(^uns, this species possesses a central 

 rosette of eiglit elongated areoles. The central part of the disc 

 is not so distant from the border as in some other species, yet 

 sufficiently defined to constitute in form a genuine Craspedo- 

 discus. The areoles are hexagonal, radiatel} arntnged, somewhat 

 smaller in the central portion tliau in the marginal. The mar- 

 ginal portion is somewhat broader than the radius of the central. 

 The form is large, being in diameter 01" Mr. O'Meara ])ro- 

 posed to nnme this form Craspedodiscus Fehigeri. 



On the Development of the Tetras])ores in Poli/siphonia. — Dr. 

 E. Perceval Wright exhibited some recent preparation^ showing 

 the development of the tetrasipores in Polysiphoiiia ni(/rescens. 

 He was not aware of any researches on this subject, but the 

 series of 8|)ecimens would clearly show that the mass of proto- 

 plasm which in time developed into the cell with the Ictraspores, 

 took its origin from the base of the central siphon, first present- 

 ing the form of an oval mass, then becoming stalked ; it next 

 greatly increased in size, and in doing so pressed out the external 

 rows of sephons which surrounded it, giving thus to the tetra- 

 sporic ramule its well-known irregular form of outline; after a little 

 the central |)ortion of the cell contents divided into the four 

 portions forming the tetraspores. The stalk, though still plainly 

 xisible with a sufiicient power, was very slender in comparison 

 with the mass it bore. 



