6 Dr. J. C. Melvill on Marine MoUusca 



Teinostoma emmdes*, sp. n. (PI. I. fig. 8.) 



T. testa subrotunda, profunde et late umbilicata, solida, calcarea, 

 alba ; anfractibus ad 5, quorum 2\ apicales bulbosi, lactei, laeves, 

 caeteris arctissime spiraliter liratis, liris sub lente irregulariter 

 rugatis, interstitiis foveolatis, ad suturas valide impressis. ultimo 

 rotimdato, lineis incrementalibus longitudinaliter accinctis, liris 

 apud basin circa umbilicum distantibus ; apertura obliqua, semi- 

 lunata, peristomate subincrassato, paullum effuso, margine 

 columellari recto, callo linguifero umbilicum obtegente. 



Alt. 6, diam. 5 mm. 



Hob. Persian Gulf ; Henjam Island, 1906. 



A most interesting species, of doubtful place and affinities. 

 After much consideration, I began by calling it a Cyclostrema, 

 but it might, owing to the obliquity of mouth, be equally 

 thought an Adeorbis, while the general " facies " suggests 

 Eunaticina. There are several points of agreement with 

 Teinostoma parvuJum, Hedley, judging from figure and 

 description, more especially as regards the close spiral liise 

 uniformly covering the whole surface, and also the prolonga- 

 tion of the tongue-shaped varix over the umbilicus. This 

 causes me to consider it of the same genus. 



Ethalia dlotrephes f, sp. n. (PI. I. fig. 9.) 



E. testa parva, alba, profunde umbilicata, solidula ; anfractibus 4, 

 quorum apicales 1| perlaeves, bulbosi, caeteris supra peripheriam 

 omnino fere planuiatis, delicatissime undique spiraliter liratulis, 

 lirulis arctis, sub lente punctulosis, oblique radiatim decurvatis, 

 extus marginulatis, peripheria acute carinata, subtus lirulis simi- 

 liter arete punctulosis, circa umbilicum radiatim extensis ; apertura 

 rotunda, labro extus paullum incrassato, subangulato, continuo, 

 columella late et triangulatim supra umbilicum extensa et 

 lingulata. 



Alt. 2, diam. 3*20 mm. (sp. maj.). 



Ilab. Gulf of Oman, lat. 24° 58' N., long. 56° 54' E., 150 

 fathoms in shell-sand. 



Unfortunately botli the examples that have occurred of this 

 strange species are broken ; the larger especially so in the 

 region of the mouth, the smaller, however, showing these 

 portions more perfectly. I know no shell at all comparable; 

 and had hoped, before attempting to describe it, that some 

 perfect specimens would be found, but this now seems very 

 unlikely to be the case. It is small, of thickish substance, 



* F/i/jfXjjs, harmonious. 

 | Siorjo60i/s, noble. 



