120 DR JAMES COSMO MELVILL AND MR ROBERT STANDEN ON THE 



Cyclostrema coatsianum, sp. n. (Plate, figs. 4, 4a). 



C. testa parva, alba, solidula, profunde umbilicata, elegaiitissime sculpta, anfractibus 4, quorum duo 

 apicales nitidi, albi, leeves, duobus caeteris lougitudinaliter lequicostatis, costis lievibus, incrassatis, subflexuosis, 

 peuultimo suprd planato, ultimo spiraliter quadricarinato, carina obtusa iiifrA suturas, binis ad peripheriam, 

 prseditis, simul ac ad basim, interstitiis omnibus subquadratis et fenestratis, regione umbilicari profunda, 

 verticali, apertura rotunda, peristomate crassiusuulo, continue. 



Alt. 1, diam. 2'25 mm. 



.Hat.— Trawl, Burdwood Bank, lat. 54° 25' S., 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 Liotia pulchella* Danker. This species is somewhat larger, and the pattern of 

 sculpture is different. We name this species in honour of Mr James 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, 5rt, 56). 



C. testa ininutlssima, profunde umbilicata, depresso-discoidali, suprA planiuscula, alba, anfractibus ad 

 3^, quorum apex ipse depressus, perlaevis, ultimo ad periplieriam obtuse carinato, uudique longitudinaliter arete 

 lirato, liris cirai vigiiiti-duabus, apud basim circa urabilicum obscure spiraliter carinato, apertura rotunda, 

 peristomate tenui, fer^ continuo, operculo corneo, multispirali, nucleo centrali. 



Alt. "75, diam. 1 mm. 



Hah. — Station 346, trawl, 56 fathoms, Burdwood Bank. 



Slightly allied to the preceding, but much difl:ering in sculpture, especially in the 

 suppression of the prominent peripheral keeling of the body whorl. Judging from 

 the figure, there is an aifinity to C. alveolatum, Jouss.,t described from an unknown 

 locality, the dimensions being only slightly less ; the interstices, however, between the 

 fiexuous costse do not appear, in our species, to be spirally striate, as is the case with 

 Jousseaume's species. 



Cyclostrem,a meridionale, sp. n. (Plate, figs. 6, 6a, 22, 22a). 



C. testa minutissima, depre.sso-trochoide, delicata, tenui, pallide albo-cinerea, epidermide fugitiva 

 straminea omnino contecta, profundi umbilicata, anfractibus 4, quorum duo apicales tumescentes, albi, 

 perlaives, cteteris duobus — penultimo uni-, ultimo anfractii spiraliter bicarinato, apertura rotunda, peristomate 

 continuo, pauUulum incrassato, apud basim circA umbilicum crenello-carinato, operculo multispirali, corneo, 

 nucleo fere centrali. 



Alt. -75, diam. -50 mm. 



Hah. — Gregariously, on various Algge (Fucus 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. Adams, F.Z.S. (1850), p. 44 ; Dunker, Mai Blatt., vol. vi. p. 225 (1860). 

 t GUERIN, Mag., p. 392, pi. xix. fig. 4 (1872). 



I Moll. Reg. Arct. Norv., p. 135, pi. xxi. fig. 1 (1908); Ball. Mus. Nat. clHist. NaturcUe (1906), Paris, p. 123, 

 (1910) p. 323. 



(ROY. SOC. EDIN. TRANS., VOL. XLVIII., 346.) 



