384 BULLETIN 37, UNITED STATES NATIONAL MUSEUM. 



PLATE XXIV. 



FIG. 1. Calliostoma (Dentistyla) sericijilum Dall ; 4.2. 



1 a. Calliostoma (Dentiitt/la) serici/ilum Dall; base, 4.5. 



2. Callogaza Wattoni D;ill, base of young shell; 6.0. 



2 a. Callogaza Walsoni Dall; 6.0. 



3. Calliostoma apicinum Dali ; alt. 7.5. 



3 a. Calliostoni'i apinnum Dall; base, diain. 7.0. 



4. Calliostoma yucutecanuM Dall ; 7.0. 



4 a. Calliostoma yncuttcanum Dail ; base, 7.0. 



5. Liotia briarens Dall ; alt. 7.5. 



5 a. Liotia briareus Dall ; base, 9.0. 



6. Calliostoma roseolum Dall ; alt. 9.5. 



6 a. Calliostoma roseolum Dall ; base, 7.0. 



7. Leptothyra Phillpiana Dall ; alt. 3.5. 



7 n. Leptothyra Philipiana Dall ; base, diam. 4.0. This species is named in 



honor of Dr. Philip P. Carpenter. 



PLATE XXV. 



FIG. 1. Additionia (lateralis var. ?) paradoxa Dall; from above ; 10.0. 



1 b. Addisonia (lateralis var?; paradoxa Dall, profile; alt. 4.0. 



1 c. Addisonia (lateralis var. ?) paradoxa Dall ; from below, showing soft parts. 



1 d. Addisonia (lateralis var. if) paradoxa Dall ; showing animal crawling. 



1 e. Addisonia (lateralis var. 1) paradoxa Dall ; dentition, complete series across 



the radula. 



2. Coccutina Beanii Dall; dentition, transverseseriesandonedetached uuciuus. 



3. Pectinodonta arcuata Dall ; dentition, pair of laterals. 



3 a. Pectinodonta arcuata Dall ; base of right lateral, with cusp broken off. 



3 b. Pectinodonta arcuata Dall; shell in profile, twice natural size. 



4. Cocculina Beanii Dall ; in profile ; 8.0. 



5. Cocculina Rathbuni Dall; dentition, transverse series and two detached 



unciui. 



6. Lepetella tubicola Verrill; dentition, transverse series. 



7. Cocculina Ratlibnni Dall, from above ; 10.0. 

 7 a. Cocculina Rathbuni Dall, in profile; 10.0. 



8. Cocculina BeaniiDal], from above; 8.0. 



PLATE XXVI. 



FIG. 1. DentaUum sericatum Dall ; 13.0. 



2. Turbonilla interrupta Totten; foot of animal from below, greatly magnified. 



2 b. Turbonilla interrupta Totten ; animal from above. 



3. Turritella yucalecana Dall; lb',5. 



4. Siliquaria modesta Dall ; 26.0. 



5. DentaUum ceratum Dall ; 30.0. 



6. Bivonia? exserta Dall, youn^ in first stage; 11. 0. 



7. Puncturella circularis Dall ; from below ; 5.75. 

 7 b. Puncturella circularis Dall, profile ; 5.75. 



7 c. Turbonilla curta Dall ; the aperture is imperfect ; 8.3. 

 7d. Turbonilla belotheca Dall; 14.0. 



8. Puncturella trifolium Dall, from below; 14.0. 



8 b. Puncturella trifolium Dall, profile ; 14.0. 



8 c. Hanleyia tropicalis Dall ; medial valve; 4.0. 



8 d. Hanleyia tropicalis Dall ; post -rior valve ; 3.0. 



9. DentaUum ophiodvn Dall ; 12.5. 

 10. Mathilda barbadcnse Dall ; .2. 



