Unioiiiila; /Vom East Asm. 11)9 



5. Cristaria inamjulata, sp. n. 



Shell short-elliptical, noarly uiiwiiiged, rather thin and 

 inflated, roumlod in IVont and behind. Posterior rid^^e 

 rounded, low. Bnsal margin re<;nlarly curved. Beaks not 

 prominent, situated at j'^p,, of the total length, with low wide 

 ridges grouped round an apical protuberance, the first ones 

 doubly looped, the following ones becoming slightly undulate. 

 Epidermis greenish brown, shining, rayed. Hinge con- 

 sisting of a single, low, lamellar j^ricumbonal, and a single, 

 low, nearly reduced, po.'^tuinbonal claustnim in each valve. 

 Anterior cicatrices faint, that of the anterior adductor and 

 that of the anterior retractor confluent. Posterior cicatrices 

 confluent, faint. 2-3 dorsal cicatrices lying in a row, otten 

 united to a groove, situated under the beak-^. IJeak-cavities 

 shallow. Nacre reddish, bluish towards the edge. 



Length 99, heiglit ')'.), diam. WJ mm. 



J/ab. Tonkin. Collected by Mr. Messager. 



Four specimens in the ISenckenberg Museum, purchased 

 from Mr. II. RoUe. 



6. Anodontites lauttis tumenSj subsp. n. 



A highly inflated form of ^1. lautus, Marts., characterized 

 by the strong ridges of the beak-sculpture, which, on the 

 upper part of the disk, become very high and nearly terrace- 

 shaped. There exist all the intermediate stages between the 

 type form and this subspecies. 



Jliib. Yaniashiro, Japan. 



Three specimens in the Senckenberg Museum, presented by 

 Messrs. bowerby and Fulton. 



7. Cristaria dUcoidea sautteri, subsp. n. 



Difi'ers from typical discoidea by the strongly developed 

 claustra, which are double in the left valve in their prie- 

 umbunal as well as in their postumbonal portion. 



JJal>. Lake Candidins, Formosa. C/oUected by Mr. Sautter. 



Three specimens with the animals preserved in alcohol and 

 three pairs of shells in the iSenckenberg J^luseum. 



8. 2\odularia douglasice crassidens^ subsp. n. 



Among the typical specimens of N. douglasice of nearly all 

 localities, there occur lieavy inflated shells with extremely 

 thick and deeply j:>gged cardinals and strong curved laterals, 

 upon which 1 bestow the subspecitic name of crassiiens. I 

 have examined specimens Irom Hainan, from Hunan, and 

 from Nmgpo, Northern China. 



