DESCRIPTIONS OF SIXTY-EIGHT NEW SHELLS. 95 



suturas multum impressis, tumidulis, tribus liris spiralibus, ultimo quatuor 

 omnino accinctis, longitudinaliter costulis obliquis decoratis, ad juncturas 

 C03tularum lirarumquo gemmuliferis, gernmulislEevibus, nitidis, anfractibus hie 

 illic variciferis ; apertura oblonga, labro paullum incrassato, apud basim 

 prolongate*, columella fere recta. 

 Long. 4*20, lat. 1 mm. (sp. maj.) 



Hah. Gulf of Oman, lat. 24° 58' N., long. 56° 54' E., 156 fathoms. 

 A fairly abundant little species, which may be distinguished by its pale 

 straw-colour, irregular varices, channelled sutures, and gemmuled lirae. The 

 most frequent form, however, is smaller than that selected for the type, the 

 apex and general shape being the same, while the whorls are less ventricose, 

 and there is rarely to be seen any trace of varices. This small form may 

 possibly be a separate, very nearly allied species ; if so, the line of demarcation 

 is almost too slight to permit of verbal differentiation. 



SCISSURELLA (ETHERIA,sp.n. (PI. B. fig. 6.) 



S. testa parva, heliciformi, angulatim ovata, obtecte umbilicata, supra 

 depresso-conica, undique alba, delicatissima, eleganter sculpturata ; anfracti- 

 bus 4, quorum apicalis parvus, mamillatus, cseteris infra, juxta suturas, bica- 

 rinatis, undique longitudinater oblique tenuiliratis, et spiraliter obscure 

 striatis, sub lente ad juncturas pulchre et minutissime gemmulatis, ultimo ad 

 peripheriam bicarinato, inter carinas ad labrum sinu perlongo, angusto ; 

 apertura subrotunda, intus alba, labro ad sinum paullum effuso, margine 

 columellari supra umbilicum angustum extenso. 

 Alt. 1*28, diam. 2 mm. 

 Hah. Gulf of Oman, lat. 24° 58' N., long . 56° 54' E., 1 56 fathoms. 

 One of two species of Scissurella extracted sparingly from shell-sand gathered 

 at the above rich locality, in company with what we are inclined to consider 

 S. aedonia, Watson (cf. ' Challenger ' Report, xv. p. 114, pi. viii fig. 3, a, b). 



The species before us is exceedingly beautiful and delicate, the surface finely 

 sculptured, with the anal slit narrow and a millimetre in length. There is some 

 affinity to S. aedonia, Watson, from Pernambuco, but our species is far more 

 depressedly conical and the outer lip more prolonged at the base. 



FOSSARUS (COUTHOUYIA) UNICARINALIS, sp. n. (PI. B. fig. 7.) 



F. testa minuta, anguste umbilicata, oblonga, nivea, pulcherrime sculpturata, 

 anfractibus quinque, quorum duo lasves, vitrei, globosi, apicales, caeteris 

 turritis, undique longitudinaliter tenuiliratis, simul ac spiraliter delicatissime 

 striatis, anfractu penultimo cum ultimo infra, juxta suturas, conspicue unicari- 

 nato ; carina etiam conspicua circa umbilicum, usque ad basim peristomatis 

 in quo immergitur, succingenda ; apertura ovata, peristomate nitido, candido 

 incrassato, planato, margine columellari quoque incrassato. 



Long. 3, lat. 2mm. 



Hah. Arabian Sea, off Bombay, lat. 18° 48' N., long. 71° 45' E„ 40 fathoms. 



