346 DR JAMES COSMO MELVILL AND MR ROBERT STANDEN ON THE 
Cyclostrema coatsianum, sp. n. (Plate, figs. 4, 4a). 
C. testa parva, alba, solidula, profundé umbilicata, elegantissimé sculpta, anfractibus 4, quorum duo 
apicales nitidi, albi, leaves, duobus ceteris longitudinaliter equicostatis, costis levibus, incrassatis, subflexuosis, 
penultimo supra planato, ultimo spiraliter quadricarinato, carina obtusa infra suturas, binis ad peripheriam, 
preeditis, simul ac ad basim, interstitiis omnibus subquadratis et fenestratis, regione umbilicari profunda, 
verticali, apertura rotunda, peristomate crassiusculo, continuo. 
Alt. 1, diam. 2°25 mm. 
Hab.—Trawl, Burdwood Bank, lat. 54° 25’ §, long. 57° 32’ W., 56 fathoms. 
Station 346. 
A very small, solid, white, boldly but elegantly sculptured Cyclostrema, the 
nearest ally being C. micans, A. Ad., from the eastern tropics, known in Indian seas 
as Inotia pulchella,* Dunker. This species is somewhat larger, and the pattern of 
sculpture is different. We name this species in honour of Mr Jamus Coats, of Ferguslie 
House, Paisley, through whose generosity the Scottish National Antarctic Expedition 
was equipped with funds, and whose regretted death, by a strange coincidence, occurred 
just after this description had been drawn up, on March 22, 1912. 
Cyclostrema gaudens, sp. n. (Plate, figs. 5, 5a, 5b). 
C. testa minutissima, profundé umbilicata, depresso-discoidali, supré planiuscula, alba, anfractibus ad 
34, quorum apex ipse depressus, perlevis, ultimo ad peripheriam obtusé carinato, undique longitudinaliter arcte 
lirato, liris cired viginti-duabus, apud basim circa umbilicum obscuré spiraliter carinato, apertura rotunda, 
peristomate tenui, feré continuo, operculo corneo, multispirali, nucleo centrali, 
Alt. °75, diam. 1 mm. 
Hab.—Station 346, trawl, 56 fathoms, Burdwood Bank. 
Slightly allied to the preceding, but much differing in sculpture, especially in the 
suppression of the prominent peripheral keeling of the body whorl. Judging from 
the figure, there is an affinity to C. alveolatum, Jouss.,t described from an unknown 
locality, the dimensions being only slightly less; the interstices, however, between the 
tlexuous costee do not appear, in our species, to be spirally striate, as is the case with 
JOUSSEAUME’S species. 
Cyclostrema meridionale, sp. n. (Plate, figs. 6, 6a, 22, 22a). 
C. testa minutissima, depresso-trochoide, delicata, tenui, pallidé albo-cinerea, epidermide fugitiva 
straminea omnino contecta, profundé umbilicata, anfractibus 4, quorum duo apicales tumescentes, albi, ~ 
perlaves, czeteris duobus—penultimo uni-, ultimo anfractn spiraliter bicarinato, apertura rotunda, peristomate 
continuo, paullulum incrassato, apud basim circ4é umbilicum crenello-carinato, operculo multispirali, corneo, 
nucleo feré centrali. 
Alt. °75, diam. ‘50 mm. 
Hab.—Gregariously, on various Aloz (Mucus and Macrocystis), Station 325, Scotia 
Bay, South Orkneys, 9-10 fathoms. 
This well-defined but very minute species is evidently the same as that recorded 
from the same islands by Dr E. Lamy,{ and considered a non-adult form of an unknown 
* A, Apams, P.Z.S. (1850), p. 44; Dunxur, Mal. Blatt., vol. vi. p. 225 (1860). 
+ GuErin, Mag., p. 392, pl. xix. fig. 4 (1872). 
{ Moll. Reg. Arct. Norv., p. 135, pl. xxi. fig. 1 (1908); Bull. Mus. Nat. d Hist. Naturelle (1906), Paris, p. 128, 
(1910) p. 323. 
