12 Dr. J. C. Melvill on Marine Mollusca 



assemblage, now known as C. (Seminella) selasphora, meli- 

 toma, phaula, &c, which were by a past generation considered 

 all one species — atomella, Duclos. The true atomella is not, 

 I believe, present in these waters, and is most probably 

 entirely confined to the New World. No form of atrata, 

 Gould, seems to coincide with C. salutaris. 



Mitra (Pusia) geoffreyana, sp. n. (PI. II. fig. 20.) 



M. testa parva, utrinque attenuata, breviter f usiformi, alba ; an- 

 fractibus 6, quorum duo apicales bulbosi, laeves, caeteris gradafculis, 

 longitudinaliter laevicostatis, interstitiis intercostalibus etiam fere 

 laevibus, sub lente delicatissime spiraliter striatulis, superficie hie 

 illic sparsim brunneo vel ochro-maculata, praecipue infra suturas 

 ad costas, simul ac labro ; apertura anguste oblonga, labro tenui, 

 columella quadriplicata. 



Long. 4*50, lat. 2 mm. 



Hab. Persian Gulf, off Sheikh-Shuaib Island. 



Hitherto confused with M. blanfordi*, M. & St., to which 

 it bears only a very distant resemblance, this pretty little 

 species is well differentiated by its four columellar plaits, all 

 of equal size and similar convolution. The ochre-brown 

 spotting on an otherwise pure white ground, principally at 

 the point of junction of the outer lip with the body-whorl and 

 on the summit of every third rib just below the sutures on 

 the penultimate and body-whorls, is peculiar. The same 

 kind of scattered blotches of colour occurs in EIusx brunneo- 

 maculata, Melv.f, from the same region, but is of rare occur- 

 rence among Mollusca so far as my experience goes. The 

 whorls are extremely gradate, costas smooth ; interstices 

 apparently likewise smooth, but with a powerful lens most 

 delicate spiral striation is observable. With age, however, 

 these strise wear off. 



Terebra remanalva \, sp. n. (PI. II. fig. 21.) 



T. testa angusta, attenuata, albo-gilva, vel, in uno specimine 

 lilacino-tincta ; anfractibus ad 15, quorum apicales 3 nitidissimi 

 perlaeves, brunnei, caeteris ad suturas impressis, infra, juxta 

 suturas, spiraliter unisulcatis, undique longitudinaliter crassi- 

 costulatis, costulis nitidis, rectis, interstitiis sub lente pulchre 

 transversim striatis, ultimo anfractu ad medium albo-teeniato ■ 



* Proc. Zool. Soc. Lond. 1901, ii. p. 423, pi. xxiii. fig. 19. 



t Mem. Manch. Soc. vol. xli. (1897) no. 7, p. 13, pl?vi. fig. 5. 



X Jiemano, alvus, refluent. 



