170 



Long. (circiter) -075, lat. •025--02, div. 180°. 

 Hab. Australia. In Mus. Brit. repertura. 



This shell may be a Cyclostrema, but its texUire agreesbetter with 

 ntrinella ; it seems to be young, and differs from all other recorded 

 species in the principai sculpture being transverse instead ot spirai. 

 TJnder the microscope, its beautiful sharp ribs remind the observer 

 of the chambers of Spirula. 



12. Odostomia (Chrysallida*) crebristriata n s. Chr. t. 

 ovato-oUonga, solida, alba; vertice mcleoso parvo, declivi, in tntn- 

 catione spira haud magna immerso ; anfr. normahbus vi. planatis, 

 suturis parum impressis ; clathrulis transversis circiter xx. rectis, 

 haud declivibus, sibi subparallelis , obtusis. circa basm rotundatam 

 ad rimulam umhilicalem continuis, labrum adultum versus ere- 

 brioribus. tenuioribus; interstitiis latis, planatis, creberrime 

 spiraliter striatis ; apertura contracta.ad basm late effusa ; phca 

 columellari conspicua, transversa, obtusa. 

 Long. -132, long. spir. -087, lat. -053 poli., div. 23°. 

 Hab. Sual, insula Luzon, Philippinarum. Legit H. Cummg ; 

 sp. un. in Museo suo. i ^ „ „„ 



This shell is probably not qnite, though very nearly mature ; as 

 the parietal lip is scarcely formed, and the labrum is not so thm as 

 usual in the adult. The aspect is quite distmct from that ot the 

 Mazatlan species. 



1 3 Chemnitzia Cumingii, n. s. Ch. t. valde elongata, turrita, alba. 

 subdiaphana, interdum fusco lineata, seu maculata ; vertice nu- 

 cleoso helicoideo, parum prominente, anfr. m. verticaltter sitis, 

 apice conspicuo, marginibus spira rectis haud superante; anfr. 

 xviii. normalibus, subrotundatis . suturis distinctis ; lirulis trans- 

 versis circiter xxviii. acutis, subrectis, subdeclivibus, circa periphe- 

 riam truncatis ; interstitiis concavis, latioribus, a sulculis spiralibus 

 vi. decussatis, in basin crebrioribus ; apertura ovata, labro tenuis- 

 simo, columella vix intorta. ^ 



Long. -55. long. spir. -47, lat. -1 poli., div. 13 . 

 Hab. In Mari Sinensi. Sp. un. in Mus. Cummg. 

 Known at once from C. grandis by the spirai strise m the concave 

 interspaces. 



14. Chemnitzia polyzonata, n. s. Ch. t. haud parva, turrita. 

 alba ■ vertice nucleoso tumente, helicoideo. anfr. m. subverticaliter 

 sitis', apice conspicuo ; marginibus spirge rectis, satis divergenU- 

 bus superante ; anfr. x. normalibus. satis tumentibus. suturis tm- 



* Siibgenns Chrysalmda. 

 Testą uiringue constricta,pnpiformi8 ; peritrema continuum, ad basin undatjcm; 

 labrum juxta aperturam tenue, intus solidius ; phca columelarts dechvts, 

 ' celata ; superjicies plerumque cancellata. Operculum {specie typica) radta- 

 tim corrugatum, tenuissimum. 

 Sp. typ. Chem7iitzia communis, C. B. Ad., Pan. Shells, no. 223, pp. 166. 31? 

 Partiį^lars of this group ^vill be found in the British Mnseum Mazatlan Cata- 

 logue, with descriptions of sixteen species from that place. 



