MELVILL : NEW MOLLUSCA. FROM THE PERSIAN GULF, ETC. 70 



rcticulati et deciissati, coeteris ad suturas impressis, ad medium 

 aiii;ulatis, longitudiiialiter crassicostatis, costis puucis, iilthui aufractus 

 ail s, spiraliter undique arete liratis, liris tilosis, apertura ovata, labro 

 ]);iullum effuso, canali paullum producto, columella simplice. Loug. 6, 

 lat. 2 mm. 



With the superficial appearance of a ClatlMrella, tliis little 

 Pleurotomid, from its tliree to four veutricose-whorled, beautifully 

 cancellate protoconch, seems well included in Pleiirotomella, Verrill. 

 It is allied to such a species as PL Packardl, Verrill »& Smith, the form 

 VerrilU of which is tigured' by Dr. Dall. Not of very frequent 

 occurrence, and I hardly think the specimens obtained adult. The 

 longitudinal ribs are remarkably incrassate, and are crossed by the 

 spiral lirjB, which give a roughened appearance to the whole surface. 

 CrLiCHNA coLLYKA,- n.sp. PI. VIII, Fig. 25. 



C. testa parva, uinbilicata, cylindrica, alba, nitida, sub lento 

 delicatissime spiraliter striata, lateribus rectis, compressiusculis, 

 apertura angustissima, ad basim latiore, labro tenui, columella 

 uniplicata. Long. 3, lat. 1 mm. 



Much like G. ci/Undracea, Pennant, in miniature, this being also 

 found in the Arabian Sea and Gulf of Oman ; I think it, however, 

 distinct. A large number of examples occurred, all of the same size, 

 and with no intermediates. 



X. B. — The opportunity may be here a good one to state that 

 Ct/Uchna Bashirensis, M. & St.. described in 1901, is undoubtedly 

 a Scajjhander, and will stand thus : — 



SCAPHANI>Ea BusHiRENsrs, M. & St. 

 Cylichna Bashirensis, M. & St. : Proc. Zool. Soc. Lond., 1901, vol. ii, 

 pp. 454, 455, pi. xxiv, fig. 21. 



Hah. — Persian Gulf, Pushire and near Fao ; Gulf of Oman, Maskat, 

 15 fathoms, also at 208 and 156 fathoms. 



VoLVULA COMPACTA, n.sp. PL VIII, Pig. 26. 



V. testa parva, ovata, compacta, alba, Ifevigata, postice obtuse 

 producta, antice ix)tundata, sub lente spiraliter arete et tenuissime 

 striata, apertura angusta, antice dilatata, labro fere recto, columella 

 apud basim crassiuscula, uniiilicata. Long. 2*5, lat. 1-25 mm. 



A somewhat solid, compact little shell, the posterior labial extension 

 obtuse and abbreviate, while the outer lip is slightly thickened and 

 rounded at the base, the columella being once -plaited. Surface white, 

 shining, the whole surface exceedingly finely and microscopically 

 1 striate. No species known to me shows so oval an outline. It was 

 abundant in shell-sand, with another species, which I cannot se])arate 

 from the common British and Mediterranean V. acuminata, Brug., 

 which, under various names, seems ubi(]^uitous throughout the 

 Northern Hemisphere, both of the Old and New World. 



1 Bull. Mas. Comp. Zuol. Harvaid Coll., xxix, pt. 2, p. 119, pi. xiv, 

 - KoAAvpa, ' a roll.' 



