IIALIOTIS. 29 



is somewhat finer, but quite as irregular as iu //. varia. The 

 flatness and breadth of the spire and comparative attenuation 

 of the anterior give a different appearance to the shell. The 

 prevalence of bright scarlet in the markings is noticeable. 

 Mr. Eeeve named the species from a very young and un- 

 characteristic specimen. 



50. VENUSTA, f. 55, Adams and Reeve. — Testa planata, 

 angusta, H. coiiciniua similis, nodis magis regularibus ; tuber- 

 culis foraminiferis magis exsertis et distantibus, tubuli- 

 formibus; labio interno lato,planato ; area marginali excavata 

 ad marginem carinata ; disco albo, rubro vel fusco variegato. 

 — Eesembling H. concinna, with the nodules more regular 

 and the intermediate strias wanting. The aperture is con- 

 tracted by the breadth of the flattened margin. The perfor- 

 ated tubercles are prominent, tubular, and few. 



51. CRDENTA, f. 63, lOl, Reeve.^Testsi planato-subrotunda, 

 postice lata, antice subattenuata, spiraliter striata, fulva, 

 maculis fuscis vel sanguineis variegata, intus argentea, labio 

 iuteruo angusto. — One of the broad flat-headed species, 

 spirally striated, fulvous, angularly flashed with brownish red, 

 generally attenuated towards the anterior end. Some shells 

 dredged by Mr. Macandrew at Suez seem to belong to this 

 species. 



52. coco-EADiATA, 75, 79, 101, Reeve. — Testa suborbi- 

 culari-ovata, planiuscula, fulva, strigis viride coccineis radia- 

 tim fulgurata, tenuiter spiraliter striata, frequenter antice 

 subattenuata. — The broad radiating flashes of crimson give a 

 peculiar character to this shell. H. nwvosa often has 

 similar rays but is rounder, more convex and scabrous. The 

 younger shells of the two species are very similar. 



53. GEMMA, f. 109, 123, Reeve. — Testa orbicularis sub' 

 complanata, spiraliter liris undulatis minutissime squaraosis, 

 tetate jimiori tuberculatis sculpta ; fulva, maculis viridis 

 coccineis fuscisque variegata ; tuberculis foraminiferis sub- 

 tubiformibus. — Eather flatly orbicular, spirally sculptured 

 with wavy ridges very minutely squamose. The type is a 

 very small shell witli minute tubercles, but in more advanced 

 specimens the wrinkles and fine squamose ridges are seen, and 

 in this state it is described as H. Dorhniiuia by Danker. 

 It is prettily mottled with red, green, and dark brown. 



