EAST COAST MARINE SHELLS 



73 



opening at smaller end small when compared 

 with Dentallum, simple or with two to four 

 slits; section flattened or circular; often 

 with a rounded rib within the smaller open- 

 ing. 



Cadulus lives in sandy and muddy 

 stations. Individuals are very numerous. 



CADULUS ACUS Dall. A small slender shell, 

 slightly curved; growth lines forming 

 densely packed circular ribs; surface vari- 

 egated by bands. Length 8 mm. Range S5- 

 294 fathoms. 



These little shells resemble Denta- 

 llum tips and lack many of the Cadulus 

 characters. 



PI. 63, Fig. 11 



Off Fernandlna, Florida; Porto Rico 



CADULUS AEQUALIS Dall. Shell large, little 

 swollen; no apical features observable. 

 Length 15 mm. Depth 339 fathoms. 



PI. 63, Fig. 9 



Off east Florida 



CADULUS AGASSIZII Dall. A moderately 

 curved, fairly solid shell; four broad shal- 

 low slits forming indistinct lobes comprise 

 the apical features. Length 9 mm. An 

 abundant species in its depth range, 17-295 

 fathoms . 



PI. 63, Fig. 12c 



Off Chesapeake Bay to Florida Keys 



CADULUS AMIANTUS Dall. A dubious species 

 which Is not represented in the National 

 collection. Length 5.75 mm. Depth 310 

 fathoms . 



PI. 63, Fig. 7 



Off Bahia Honda, Cuba 



CADULUS CAROLINENSIS Bush. Medium sized, 

 no swelling; smooth rounded lip; apical 

 opening very small, equipped with four shal- 

 low slits or notches, producing four lobes 

 which are often damaged. Length 9.5 mm. 



Abundant in shallow water near Hat- 

 teras but rarer farther south. Taken in 

 3-107 fathoms. 



PI. 65, Fig. 19 



PI. 55, Fig. 22 



Cape Hatteras, North Carolina; 



Florida 



CADULUS CUCURBITA Dall. Depth 310 fathoms. 

 PI. 63, Fig. 12d 

 Off Bahla Honda, Cuba 



CADULUS LUNULA Dall. Depth 805 fathoms. 

 PI. 63, Fig. 8 

 Off Havana, Cuba 



CADULUS QUADRIDENTATUS Dall. Shell regu- 

 larly and gradually Increasing in diameter; 

 moderately curved; four deep slits in apex, 

 leaving lobes. Length 7-10 mm. Depth 

 range extends from 2 fathom^ off Miami to 

 50 fathoms near Fowey Light, Florida. 

 PI. 65, a variety. 



PI. 63, Fig. 5 



PI. 65, Fig. 20 



Cape Hatteras, North Carolina to 



West Indies; Gulf of Mexico 



CADULUS WATSONI Dall. A highly polished 

 shell which is slightly curved. Length 13 

 mm Range 382-413 fathoms 



PI. 63, Fig. 12a 



Off Cuba and Bahamas 



