12 



MOLLUSCA IN THE MaYA LoWLANDS 



in adult specimens has a strong former varix roughly 

 opposite the aperture. 



Cassis madagascariensis Lamarck 



Illustration: Warmke and Abbott, 1961, pi. i,/. 



Modern distribution: East coast, Corker Cay, B.H., 

 to Isla Mujeres, Q.R. 



Archaeological occurrence: 



TIKAL: 2 unworked, "probably madagascarien- 

 sis," undated (M-MS). 



Cassis tuberosa (Linne) 



Illustration: Plate 11, fl. 



Modern distribution: East coast, from Turnefle Is- 

 lands, B.H., to Isla Contoy, Q.R. Also Alacran Reef. 



Archaeological occurrence: 



ISLA CANCUN MIDDEN: 36 unworked. For- 

 mative. 



SAN JOSE: i artifact of Cassis, "probably tuber- 

 osa," S.J. Ill (T, p. 181, pi. 28,r). 

 TIKAL: I, slightly altered, probably Late Classic 

 debris (M-MS). 



Cypraecassis testiculus (Linne) 



Illustration: Plate 6,c,cc. 



Modern distribution: East coast, from Turnefle 

 Islands, B.H., to Isla Contoy, Q.R. Also Cayo 

 Areas. 



Archaeological occurrence: 



MAYAPAN: i fragment, unworked, probably 

 Decadent period (P, p. 387). 

 ISLA CANCUN MIDDEN: 11 unworked, For- 

 mative. 



Family: CYMATIIDAE (tritons) 



Charonia variegata (Lamarck) [^ C. tritoms nobilis 

 (Conrad)] 



Illustration: Plate i,a. 



Modern distribution: Frequent on east coast from 

 Belize to Isla Mujeres. A single shell from Chavi- 

 hau on north coast. Also found on offshore atolls. 



Archaeological occurrence: 

 ISLA CANCUN MIDDEN: 7 unworked. For- 

 mative. 



Cymatium jemorale (Linne) 



Illustration: Plate 7,^,^6. 



Modern distribution: Rare. East coast from Turnefle 

 Islands, B.H., to Isla Mujeres. El Cuyo on north- 

 east coast. Alacran Reef. 



Archaeological occurrence: 



MAYAPAN: i unworked, "from a house mound 

 cist, together with smaller perforated shells," 

 Decadent period (P, p. 387, fig. 47,«). 

 ISLA CANCUN MIDDEN: 2 unworked, For- 

 mative. 



BARTON RAMIE: i unworked. Classic (W, 

 p. 526). 



Cymatium parthenopeum (von Salis) 



Illustration: Plate 7,f,irc. 



Modern distribution: Uncommon on all three coasts, 

 from Isla Mujeres to Isla Carmen. 



Archaeological occurrence: 



DZIBILCHALTUN: i unworked, from Cenote 

 Xlacah, probably thrown in as offering. Not 

 datable. 



ISLA CANCUN MIDDEN: i unworked. For- 

 mative. 



Cymatium pileare (Linne) \= C. martinianum 

 (d'Orbigny)] 



Illustration: Plate -],d,dd. 



Modern distribution: Uncommon on all east and 

 north coasts and on the offshore atolls. Turneffe 

 Islands, B.H., to Punta Palmar, Yuc. 



Archaeological occurrence: 



DZIBILCHALTUN: i perfect specimen, un- 

 worked, in Late Early period deposit. 

 ISLA CANCUN MIDDEN: i unworked. For- 

 mative. 



Family: TONNIDAE (tun shells) 



Tonna galea (Linne) 



Illustration: Plate 7,/,//. 



Modern distribution: Rare on east and north coasts, 

 and at Alacran Reef. 



Archaeological occurrence: 



ISLA CANCUN MIDDEN: 2 unworked. For- 

 mative. 



Tonna maculosa (Dillwyn) 



Illustration: Plate 7, ?,£■<?. 



Modern distribution: More common on east coast 

 from Turneffe Islands to Isla Contoy. Collected 

 at Chavihau and Sisal on north coast, and at 

 Alacran Reef. 



Archaeological occurrence: 



ISLA CANCUN MIDDEN: 4 unworked. For- 

 mative. 



