184 BULLETIN 37, UNITED STATES NATIONAL MUSEUM. 



PLATE XXIV. 



Fig. 1. Calliostoma (Dentistyla) serioifilum D&W ; 4.2. 



1 a. Calliostoma {Dentistyla) sericifilwm Dall ; base, 4.5. 



2. Callogaza Watsoni DaW, base of young shell; 6.0. 



2 a. Callogaza Walsoni Dall ; 6.0. 



3. Calliostoma apicinum Dall ; alt. 7.5. 



3 a. Calliostoma apicinum Dall; base, ciiam. 7.0. 



4. Calliostoma yucatecanumDaAl; 7.0. 



4 a. Calliostoma yucatecanum Dall ; base, 7.0. 



5. Liotia briareus Dall ; alt. 7.5. 



5 a. Liotia iriareus Dall ; base, 9.0. 



6. Calliostoma roseolum Dall ; alt. 9.5. 



6 a. Calliostoma roseolum Dall ; base, 7.0. 



7. Leptothyra Philipiana Dall ; alt. 3.5. 



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



honor of Dr. Philip P. Carpenter. 



PLATE XXV. 



Fig. 1. Addisonia (lateralis var. ?) paradoxa Dall ; from above ; 10.0. 



1 b. Addisonia {lateralis vavl ) paradoxa Dall, profile; alt. 4.0. 



1 c. Addisonia {lateralis var. 'I) paradoxa Dall ; from below, showing soft parts. 



1 d. Addisonia {lateralis var. ?) paradoxa Dall ; showing animal crawling. 



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

 the radula. 



2. Cocculina Beanii Dall ; dentition, transverse series and one detached unci nus. 



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



3 a. Pectinodonta a7-cuataDa,ll; base of right lateral, with cusp broken off. 



3 b. Pectinodo>tta arcuata Dedl; shell in profile, twice natural size. 



4. Cocculina Beanii Dall ; in profile ; 8.0. 



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



uncini. 



6. Lepetella tuhicola Verrill; dentition, transverse series. 



7. Cocculina Baihhuni Dall, fvoia above; 10.0. 

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



8. Cocculina ^eajiii Dall, from above; 8.0. 



PLATE XXVI. 



Fig. 1. Dentalium sericatum Dall; 13.0. 



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



2 b. Turbonilla interrupta Totten; animal from above. 



3. Turritella yucatecana'DdiW; 16.5. 



4. Siliquaria modesta Dall ; 26.0. 



5. Dentalium ceratum Dall ; 30.0. 



6. Bivonia ? exserta D'cill, yoan^ in first stage; 11. i'. 



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. 



7 d. Turbonilla belotheca Dall; 14.0. 



8. Puncturella trifolium Dall, from below ; 14.0. 



8 b. Puncturella trifolium Dall, profile ; 14.0. 



8 Q. Hanleyia tropicalts D all; medial valve; 4.0. 



8d. Hanleyia tropicalisDdill; post ^rior valve ; 3.0. 



9. Dentalium ophiodon Dall; 12.5. 

 10. Mathilda barbadonse Dall ; . .2. 



