1(10 THE VOYAGE OF H.M.S. CHALLENGER. 



straight. The hinder slope is very oblique and also straightish. The ventral outline is 

 but slightly excurved, not sinuated posteriorly, regularly up-curved in front, forming 

 with the dorsal margin an obtuse rounded extremity. At the opposite end it is less 

 ascending and forms a blunt angle at its junction with the lateral outline. The hinge is 

 composed of two cardinal teeth and a single anterior lateral in each valve. Of the 

 former the posterior in the right valve, and anterior in the left, are triangular, Ijifid, and 

 much larger than the others, and the lateral tooth of the right valve is more conspicuous 

 than that of the left, which consists merely of a slight prominence of the dorsal edge. 

 The ligament is shortish, yellow-brown, and prominent. The inner surface of the valves 

 is glossy, somewhat iridescent, and exhibits a deep large pallial sinus extending almost 

 to the anterior scar. 



Length 19^ mm., height 11, diameter 5j. 



Habitat. — Station 187, off Cape York, North Australia, in 6 fathoms ; coral mud. 



This species is considerably like the European Tcllina donacina, Liund, as regards 

 form, Ixit rather more tapering at the anterior end, somewhat shorter and scarcely so 

 acuminate posteriorly, and the sculpture is a little coarser. 



Tellina {Tellinella) verrucosa, Hanley. 



Tellina verrucosa, Hanley, in Sowerby's Thesaurus, vol. i. p. 225, pi. Iviii. fig. 77. 



Tellina verrucosa, Sowerby, Concli. Icon., vol. xvii. fig. 96. 



Tellina (Tellinella) verrucosa, Eomer, Conch. -Cab., ed. 2, p. 23, pi. ix. figs. 1-3. 



Habitat. — Station 172, off Nukalofa, Tongatabu, in 18 fathoms (Challenger) ; Bay of 

 Manila, Phili^jpine Islands (Cuming). 



This species is narrower and more rostrate than Tellina asperrima, Hanley, Tellina 

 pulcherrima, Sowerby, Tellina semiaspera, Deshayes, and Tellina squamulosa, which have 

 more or less similar style of sculpture. 



Tellina (Tellinella) charlotta', n. sp. (PI. IV. figs. l-l6). 



Testa tenuis, albida, umbones versus lutescens, valde inferpiilaterahs, elongata, antice 

 rotundata, postice acuminata, ad extremitatem breviter truncata, concentrice tenuiter 

 lirata, liris postice hie iUic anguste lamellatis. Margo dorsi anticus parum oliliquus, \'ix 

 curvatus, posticus brevior, valde dechvis, rectilinearis. Margo ventris leviter arcuatus, 

 postice vix sinuatus. Dentes cardinales valvse dextras duo divergentes, unicus in valva 

 sinistra subbifidus. Laterales tenues fere sequidistantes. Sinus pallii profundissimus 

 fere ad cicatricem anteriorem extensus. 



This species is entirely white with the exception of a very faint tinge of yellow towards 

 the beaks. It is thin, compressed, very inequilateral, the anterior side 1)eing considerably 

 longer than the posterior. It is transversely elongated, sharply rounded in front, and 



