December 7, 1906.] 



SCIENCE. 



743 



Genus Cleiothyris, Phillips, 



Type Terebratula concentrica, von Buch. 



The type here is not so certain; but this 

 seems to be the solution of Phillips's rather 

 ambiguous phrases. At any rate Cleiothyris 

 can not be used as King intended. 



The genus Seminula has hitherto been in- 

 correctly used, with Spirifer amhiguus as 

 type, on a doubtful identification of David- 

 son's — that T. perdaedra, the true genotype, 

 was a synonym of 8. amhiguus. But T. pen- 

 taedra is hypothyrid, that is, it has a rhyn- 

 chonelliform beak; while ;S'. amhiguus is epi- 

 thyrid, that is, it has a terebratuliform beak. 

 T. pentaedra is what would at present be 

 called a G amarophoria. 8. amhiguus happens 

 to have been taken as type of a genus Com- 

 posita in 1845, but it has always been over- 

 looked. Therefore — 

 Genus 8eminula, McCoy. 



Type Terebratula pentaedra, Phillips. 



Non 8eminula, auct. 



The genus is not of the family Athyridse, 

 but is a pentamerid, allied to the later named 

 C amarophoria, which may, perhaps, be re- 

 tained for the transverse multiplicate forms, 

 8eminula designating the globose paucipli- 

 cate species. 

 Genus Composita, Brown. 



Type 8pirifer amhiguus, Sowerby. 



Syn. 8eminula, auct. non McCoy. 



Eef. T. Brown, < lUustr. Fossil Conch. G. 

 Britain and Ireland,' p. 131, 1845. This work 

 of Brown's has been altogether neglected, and 

 his names overlooked; but he was quite defi- 

 nite about his type. His work appeared in 

 parts from 1837 to 1849; and the date of p. 

 131 is 1845. (Vide, Sherborn, Proc. Malacol. 

 Soc, VI., 358, 1905.) All the athyrids hith- 

 erto assigned to 8eminula will have to bear 

 the name Composita. 

 Genus Leptodu^, Kayser. 



Syn. Lyttonia, Waagen. 



Leptodus is generally given as a synonym 

 of Lyttonia; but Waagen was not justified in 

 suppressing Kayser's name merely because he 

 placed it among fishes. 

 Genus Cyclothyris, McCoy. 



Type, the species figured by McCoy, ' Carb. 



Poss.,' p. 150, fig. 29 = Terehratula latissima, 

 Sowerby. 



Davidson made this suggestion, and it ap- 

 pears correct. Therefore, the bulk of the 

 Mesozoic Rhynchonellse — all those that are 

 multiplicate and hypothyrid — should go under 

 this genus rather than under Bhynchonella, 

 which should be applied only to the species 

 congruous with the R. loxia series of paucipli- 

 cate hypothyrids. 



New names are required for Hypothyris, 

 auct. non Phillips and Cleiothyris, auct. non 

 Phillips. The following were suggested: Hy- 

 pothyridina, vice Hypothyris, and Cleiothyri- 

 dina, vice Cleiothyris. 



S. S. BUCKMAN. 



CURRENT NOTES ON METEOROLOGY. 



THE CYCLONIC THEORY. 



To the interesting discussion concerning 

 temperatures in cyclones and anticyclones, H. 

 H. Clayton contributes an article in the Bei- 

 trdge zur Physik der freien Atmosphdre, Vol. 

 II., No. 2, on ' A Discussion of the Observa- 

 tions obtained by the Blue Hill Observatory 

 with Ballons-sondes at St. Louis.' As the 

 readers of these notes are aware, this discus- 

 sion has been going on for some time, and has 

 been participated in chiefly by Hann, Clayton 

 and Bigelow. To go into the details as each 

 article appeared has always seemed to the com- 

 piler of these notes too technical a matter for 

 the columns of a general scientific journal 

 like Science, and to do so would have occupied 

 a good deal more space than could be devoted 

 to meteorology in this publication. We are 

 glad to note the emphasis which Mr. Clayton 

 lays upon the points upon which general agree- 

 ment has been reached, for further discussion 

 will be more helpful and more to the point if 

 the matters which have found general accept- 

 ance are clearly established. To quote : " The 

 results of all the investigators agree in show- 

 ing that the highest temperatures at all 

 heights within an area of low pressure are in 

 advance of the barometric minimum and the 

 lowest in the rear; while in the area of high 

 pressure the lowest temperature is in advance 

 of the barometric maximum and the highest 



