GeoJoijical Suci'cty. 395 



nboiit ?, tlie orbit ; cmuliil jicdmu'le 



us Itiiij^ as liL'iiil. (.Japan, L. IJiwa ). . L. hm<e (Joixlftii >t 

 mi. Scalo.s ;Jo; 4 4.1 scales between latiTal ["Snyder) *. 



line and middle of liellv ; barbel as 

 loufi' as or a little lonf,'^er tliau eve ; 

 caudal j)etluncle siiorter than head. 



(8. Korea.) L. coreanuSj Berg'. 



AA. ]']ye small, 4 or more in length of head. 



b. Body deep ; depth of body not moro 



tlian ■) in its ]en;,r!^h (without caudalj. 



c. Caudal jieduncle loss tiuiu twice as 



lonji; as deep. 



d. Origin of dorsal in advance of ven- 



tral ; barbed shorter than eye. 



(Central .Japan.) L. G'untlicri, Ishlkawaf. 



dd. Dorsal opposite to ventral ; barbel 

 very minute. (Head-water of 



Yangtsekiang'.) L. tantalus, GLinther J. 



cc. Caudal peduncle more than twice as 

 long as deep. 



e. Maxillary not reachinp^ behind 



middle of snout. (Ilui-hsien, 



Southern Kausu.) L. Herzensteini, Giiuther §. 



ee. Maxillary reaching beliind middle 



of snout. (8. .Japan.) L. Ma\jed<e (.Jordan & 



bb. IJody slender; its deptli more than 5 Snyder) II. 



iu its length. (Japan, L. Uiwa.) .... L. Jordani, IshikawaH. 



PROCEEDINGS OF LEARNED SOCIETIES. 



GEOLOGICAL SOCIETY. 



May 23rd, 1906.— R. S. Herries, M.A., Yice- President, 

 in the Chair. 



The following communications were read : — 



1. ' On the Importance of HuUmeda as a Reef-fonning 

 Organism ; with a Description of the //aZufucZrt-Limestones of the 

 New Hebrides.' Ry Frederick Chapman, A.L.S., F.R.M.8., and 

 Douglas Mawson, R.E., B.Sc. 



Calcareous alga?, nuUipores, Litliothamnlon, etc., have been 

 frequently referred to as forming important contributions to the 

 rock of coral-reefs. The material obtained in the great boring, the 

 lagoon-borings, and lagoon-dredging at Funafuti has yielded a 



* Proc. U.S. Nat. ]\Ius. sxiii. 1900, p. 340; xxvi. 190.3, p. 829. 

 t Anmt. zool. japon. iii. 1901, p. 161. 

 X Ann. Mus. Zool. Petersb. i. 1896, p. 214. 

 § L. c. p. i'13. 



II Proc. U.S. Nat. Mu.'s. xxiii. p. 342 ; xxvi. p. 828. 

 11 Ann. zool. Jap. iii. 1901, p. 163. 



