50 ZOOLOGY OF THE VOYAGE OF THE SULPHUR. 



The base is distinctively ornamented with reddish-brown rays, and the 

 square spots on the whorls are somewhat twin in their distribution, since they 

 occupy corresponding situations in the two upper narrow areas. 



204. Solarium perdix, Hinds, 1. c. p. 22, (Plate XIV. fig. 3, 4.) Testa conoidea, tenui, 

 laevigata, pallida; anfractibus subtumidis, superne cingtilo unico divisis, spirse minute plico-striatis ; 

 ad peripberiam angulata tricarinata, carina media, prominente, majore, crenifera ; cingulo et carinis 

 maculis rufis subquadratis ornatis ; umbilico patulo, crenulis parvis albis cincto. 



Inhab. Ceylon ; north-west coast of Australia. 



This possesses the general contour of S. perspeclivum, but is thinner, the 

 whorls are slightly tumid, and furnished above with a fiat smooth girdle, orna- 

 mented with somewhat distant rufous spots. The most prominent keel is character- 

 istically covered with small tubercular crenulations. When placed on its base, the 

 apex is much inclined and the general direction oblique. The umbilicus is some- 

 what less patulous than in S. perspectivum, and neatly encircled with numerous 

 white and smaller crenations. The umbilical space is destitute of ribs, folds, or 

 keels, bearing alone the marks of the striae of growth and a thin horny 

 epidermis. 



205. Solarium placentale, Hinds, 1. c. p. 22, (Plate XIV. fig. 5, 6.) Testa, discoidea, pallide 

 fulva, laevigata; spira valde depressa ; anfractibus planulatis, ordinate spiraliter striatis ; ad peri- 

 pheriam obtuse unicarinata, subtus striata; carina crenulata; ad basin subtumida. ; apertura 

 triangulari ; umbilico valde patulo, crenis tuberculatis subdistantibus armato. 



Inhab. Bay of Magdalena, California ; in seven fathoms, sand. 



206. Solarium quadriceps, Hinds, 1. c. p. 23, (Plate XIV. fig. 7,8.) Testa, orbiculato-discoidea.; 

 anfractibus quadriseriatim cingulatis; cingulis tuberculis quadratis, planulatis, approximatisinstructis, 

 inferiore majore, et cum superiore rufo picto ; ad basin tumida, area mediana radiatim plicata ; 

 umbilico patulo, crenis magnis fuscis cincto ; area umbilicali lsevi. 



Inhab. Bay of Panama ; in five fathoms, among mud. 



This species is very closely allied to S. granulatum, from which it will be 

 found to differ in the character and relative proportion of the granular girdles. A 

 single and perhaps rather small specimen was alone obtained, which is somewhat 

 more discoid than the above species; four girdles traverse each whorl, of which 

 the inferior is the largest, and the tubercles closely set, flattened, and obliquely 

 square ; the umbilicus is rather more expanded, and the marginal tubercles are of 

 a similar size, but coloured of a reddish brown. & 1 . quadriceps is an American 

 shell, and <S'. granulatum an Asiatic. 



207. Solarium asperum, Hinds, 1. c. p. 23, (Plate XIV. fig. 9, 10.) Testa discoidea; spira 

 retusa ; anfractibus superne planulatis, inferne rotundatis, ubique cingulis parvis numerosis instructis ; 

 cingulis tuberculis parvis asperatis ; umbilico valde patulo; area, angusta, laevi. 



Inhab. Straits of Macassar ; in eleven fathoms, coarse sand. 



