Notes and Comments. 275 



inconvenient the council will probably consider the possibility 

 of a meeting in or near London. 



KEI.ESTOMIN.E : CRETACEOUS CRIBrilMORPH POLYZOA. 



At a recent meeting of the Geological Society of London, a 

 paper on ' The Kelestominae, a Sub-Family of Cretaceous 

 Cribrimorph Polyzoa ' was read by WiUiam Dickson Lang. 

 He stated : — ' The Kelestominse are a sub-family of Pelma- 

 toporidas. The latter are a family of Cretaceous Cribrimorph 

 Polyzoa, whose costae are prolonged upwards as hollow spines 

 from the median area of fusion of the intraterminal front-wall. 

 The broken ends of these spines form a row of pelmata for, if 

 small, pelmatidia) on the intraterminal front-wall. The 

 Kelestominae are Pelmatoporidse with an apertural bar each 

 half of which is bifid ; and the proximal and distal forks of 

 each half are fused with the corresponding forks of the other 

 half. The fused distal forks are also fused with the proximal 

 pair of apertural spines, which are greatly enlarged. The 

 simplest known form of this arrangement is seen in the genus 

 Kelestoma Marsson. Kelestoma is characterised among the 

 Kelestomime by its great oecial length, and bj' the great number 

 of costee. Kelestoma has the following three species, which 

 form a single lineage : — (i) Kelestoma elongatuni Marsson, 

 with an incrusting asty ; (2) a new species, with a bilaminar, 

 erect asty ; (;^) K. scalere Lang, with an erect, cylindrical 

 asty. There is, in this series, a slight catagenetic decrease in 

 the number of costa;, and the avicularian aperture becomes 

 somewhat more pointed. The genus occurs in the Senonian 

 zouQ of Belemniiella m 11 arena! a, in the island of Riigen.' We 

 are quite prepared to accept his statements, though we are 

 relieved to see that Dr. S. F. Harmer objected to some of the 

 new words employed. 



THE PAL.EONTOGRAPHICAL SOCIETY. 



We are glad to see that Vol. LXX. of the Palseontographical 

 Society's Report just to hand is of the size and importance of 

 the Society's pre-war publications. The present issue contains 

 The Wealden and Purbeck Fishes, part 2, The Piocene Mollusca, 

 part 3, The Paleozoic Asterozoa, part 3 ; by Dr. A, Smith 

 Woodward, Mr. F. W. Harmer, and Mr. W. K. Spencer res- 

 pectively. There is also a title page and index as well as a 

 ' History of Research ' to Part 11 of British Graptolites by 

 Gertrude L. Files, and Ethel M. R. Wood. Dr. Smith Wood- 

 ward's contribution is a continuation of his work on the Fossil 

 Fishes, and includes descriptions and illustrations of many 

 important south country examples. Mr. Harmer's monograph 

 is practically a supplement to S, V. Wood's Monograph of the 

 Crag Mollusca, and includes particulars of many important 

 additions to that well-known work, several being from York- 



1918 Sept. 1. ^ 



