340 MOLLUSCA. BUCCINIDiE. Morio. 



Gen. morio. — Aperture longitudinal, narrow, ending in a 

 recurved canal. 



1. M.carma/M.9.— Shell pyriform; spire short; volutions depressed, angular, 

 with many longitudinal striae, and three nodose ridges— (Buccinum nodosum, 

 Brander, front. No. 131).— Cassis car. Sower. Min. Conch, t. vi.; the three 

 upper figures. — London Clay. 



Gen. LXXII. NASA. — Spire produced ; canal very short, 

 obliquely truncated. 



308. N. reticulata. — Outer lip simple externally ; the longi- 

 tudinal ridges decussated by narrow, deep, spiral grooves. 



But", cancellatum, List. Conch, t. Dcccclxvi. f. 21. — B. reticul. Linn. Syst. 

 i. 1204. Penn. Brit. Zool. iv. 122. t. Ixxii. f. 92. Mont. Test. Brit. 

 240 Not uncommon. 



Length an inch and a half; breadth three quarters ; of a brownish colour ; 

 whorls seven or eight, rather flat ; aperture lengthened ; outer lip nearly 

 straiglit retrally ; inner lip slightly tuberculated. — This shell is subject to 

 slight variations in the relative size of the ribs. 



309. N. incrassata. — Outer lip thickened by a strong exter- 

 nal rib ; whorls shghtly rounded ; longitudinal ridges decussated 

 by narrow flattened spiral ridges. 



Tritonium incrass. Mull. Zool. Dan. Prod. 244, No. 2946 — Buc. minu- 

 tum, Penn. Brit. Zool. iv. 122. t. 79 — B. macula, Mont. Test. Brit. 

 241. t. viii. f. 4. Near low water-mark, common. 

 Length half an inch ; breadth above a quarter ; colour various, mottled ; 

 whorls six or seven ; aperture orbicular ; outer lip rounded, denticulated, with 

 a short tooth at the junction with the margin of the canal; inner lip concave, 

 faintly tuberculated ; canal with a black end. Dr Turton notices two varie- 

 ties, A having the outer lip thin, and not toothed on the inside, and B " with 

 a notch or cut at the upper angle of the outer lip, separating it from its at- 

 tachment to the body volution, similar tc that which is found in the Murex 

 ' gracilis." — Conch. Diet. 15. He has likewise described a very common va- 

 riety of this shell, with the pillar white externally, under the title Tritonia va- 

 ricosa, Zool. Journ. No. vii. 365. t. xiii. f. 7* 



310. N. amhigiia. — Outer lip thickened by a strong external 

 rib ; whorls slightly depressed towards the junction ; the longi- 

 tudinal ridges decussated by numerous spiral strise. 



Buc. amb. Pult. Dorset. 42. Mont. Test. 242. t. ix. f. 7 — On the Eng- 

 lish and Irish coasts, not common. 

 Length half an inch, breadth three-eighths ; white, whorls six, with from 

 eleven to fifteen ribs ; aperture suborbicular ; outer lip denticulated, with an 

 obsolete tooth at the canal ; outer lip wiih two distant folds. 



311. N. cincta. — Outer lip thickened by a strong external 

 rib ; whorls nearly even ; interstices of the ribs obsoletely striated 

 spirally. 



Buc. cinctum, Mont. Test. 246. t. xv. £ 1.— Found at Weymouth, Mr 

 Bryer. 

 l-ength about a quarter of an inch ; white, with a rufous spiral band ; whorls 



