LIVING BRACHIOPODA. 373 



other obliquely (61 : 8a) . A septum seems to divide the two sides anteriorly. The 

 setigerous follicles start from the edge of the coelomic wall and as the animal grows, this 

 Une is carried beyond the coelomic wall. The same displacement is seen in other parts ; 

 as the animal increases in diameter the attachments of the various muscles, which were 

 compacted before, become more widely separated. The sinuses and lacunae are wide and 

 irregularly branching, the main branches showing the ^ciliary ridges. The stomachal 

 glands, in an early stage, appear as solid masses (61 : 10) , but shortly after, break up into 

 numerous coeca. In all the early stages of D. lamellosa, the stomach is distinctly bulbous. 

 In the young of D. stella, the anterior setae are much longer than in the corresponding 

 stage of D. lamellosa (61 : 3) . In quite an advanced stage, the stomach is large, round, 

 and apparently fills the entire coelomic cavity (61 : 2) . 



In the young of If. psittacea (61: 17), the shell is quadrate, slightly narrowing 

 behind, with corners widely rounded. The peduncular portion is large and more than one 

 third the length of the dorsal shell. The peduncular opening is very large. In this stage, 

 the lophophore appears circular, as in the early stages of Terebratulina ; the stomachal 

 glands show two or three coeca on each side, the setae are long and extremely tenuous, 

 and appear only on the anterior and lateral portions of the pallium; in the specimen 

 figured, seventeen were counted. Near the peduncle, the muscles and interlocking processes 

 of the shell were partially made out. 



Since these pages were written, a very interesting communication has appeared, on 

 the habits of Lingula by Naohide Yatsu.^ His notes relate to the large Lingula, L. 

 anatina. He remarks on the great vitaUty of the species in surviving conditions which 

 kill most other marine animals. He records that his friend, Mr. Namiye, detected the 

 burrows of this Lingula by the appearance of three holes on the surface of the mud in 

 which they were imbedded. It would appear from this observation that the species 

 formed the three setal tubes as described in L. lepidula (p. 319) . He also presents evi- 

 dence showing that L. anatina lives more than one year. His memoir on the develop- 

 ment of Lingula is announced as in press, to be pubhshed in the journal of the college of 

 science of the imperial university, Tokyo. 



Professor Edwin G. Conklin has kindly sent me the advanced proofs of a forthcoming 

 memoir of his on the embryology of a brachiopod ( Terebratulina septentrionalis) , which 

 will soon be published by the American philosophical society in vol. 41, no. 168. In this 

 communication he shows that the embryo of this brachiopod, at least, belongs to the tro- 



1 Annotationes zoologicae Japonenses, March, 1902. 



