160 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



strongest power. It is possible I am joining two species, but, until 

 a larger series is obtained, 1 am persuaded this is the wiser course. 

 The basal sculpture of the var. carinulata, below the somewhat 

 carinate periphery, is very distinct in some examples, but others show 

 a more marked columellar callus, and a consequent transition towards 

 the typical form. I am under much obligation to Dr. W. H. Dall 

 for his opinion as to the location of this species. He wrote me as 

 follows : — " This belongs to the section or subgenus of Ethalia or 

 Teinostoma which Conrad named Solariorbis. In the ' Blake ' report 

 I included some species under Ethalia, but they are closely related to 

 Teinostoma also, and, until we know something about the operculum 

 and animals, it is impossible to make a final classification of these 

 curious little shells." 



Basilissa (Ancistrobasis) compsa,^ n.sp. PI. X, Fig. 4. 



B. testa parva, conica, anguste umbilicata, albida, delicata, anfrac- 

 tibus 6, apicali vitreo, globulari, cseteris ad suturas impressis, simul ac 

 ad peripheriam, et profunde alveatis, supernis binis, penultimo tribus, 

 ultimo supra peripheriam quatuor liris spiralibus proeditis, undique 

 longitudinaliter arctissime et suboblique decussato-liratis, interstitiis 

 quadratis, ultimo ad peripheriam bicarinulato, crenellifero, simul ac 

 circa umbilicum, basi planato, trochiformi, liris concentiicis 8-9 

 decorate, interstitiis spiraliter minutissime punctatis vel alveolatis, 

 apertura subquadrata, labro tenui, concavo, columella ad medium et 

 ad basim sinuata, excavata, utrinque incrassata, prominula. Alt. 2'25, 

 diam. 2 mm. 



The smallest of the few described species of this abyssal genus. Its 

 chief affinity would seem to lie with B. alta, var. oxytoma, Watson, 

 from the Gulf of Mexico, as regards size and form, but the sculpture 

 is quite different, and the grooved excavate callosity of the columellar 

 and basal regions shows it really belongs to the section Ancistrobasis, 

 Dall. All the original material for this genus, described by the 

 Eev. E,. Boog Watson^ in 1879, consisted of specimens not quite 

 adult, and accordingly an emended diagnosis was found necessary by 

 Dr. DalP a few years later (1889). 



ScissuRELLA Jaoksoni, n.sp. PI. X, Fig. 5. 



S. testa parva, profunde umbilicata, oblongo-ovata, undiqne alba, 

 tenuissime delicata, anfractibus 5, quorum apicalis parvus, glolnilaris, 

 hj-alinus, cantoris ad medium bicariuatis, suturis comprcssis, arctissime 

 oinnino longitudinaliter liratulis, liris supra carinas curvatis, infra 

 rectis, ultimo anfractu infra, usque ad basim, obscure spiraliter striato, 

 inter carinas sinu angusto, sed longo, apertura rotunda, labro ad sinnm 

 paullum incrassato, margine columellari supra umbilicum in speci- 

 minibus quibusdam extenso. Alt. r75, diam. 1-75 mm. 



1 KSfxif/o?, elegant. 



2 Rep. "Challenger" Exped., vol. xv, p. 100. 



3 Bull. Mus. Comp. Zool. Harvard, xxix, p. 383. 



