109 



Cylichna tliscus, Watson. 



CyJichna disens, Watson, Jourii. Linn. Soc. London, vol. 17, 18S3, p. 319. 



— — Watson, Rpp. Sui. Res. Challenger E.\p. ZooL. vol. 1.5, 188(5, p GG4. Pl. 



Findested. Stationeme 18, 81, 51, 87, 192, 200, 

 240 og 295. Dybde 412— 11G3 f v. 



Paa de største havdjb forekom cyViclnm disciti^ ret 

 hyppig. Den er af „Challenger-'expeditioncn tåget ved 

 Culebra Island, Vestindien, 390 fv., og efter meddelelse 

 fra Jeffreys, der i sin tid havde exemplarer fi'a den norske 

 expedition til sammenligning, fandtes den af ,,Porcu- 

 pine"expeditionen udenfor den spanske og portugisiske kyst, 

 304—994 fv. 



De fleste exemplarer fra de større dyb havde spiret 

 noget eroderet, saaat flere vindinger var synlige. Hos ube- 

 skadigede exemplarer saaes derimod blot en fordybning. 

 Fra ri/Iichna alba afviger denne art blot ved sin forholds- 

 vis slankere niere cylindriske form. Dog maa beraærkes 

 at exomplarerno fra de mindre dyb saasom station 18, 31 

 og 87 nærmede sig stærkt til cylichna alba. 



49, tio'. 19. 



192, 200, 240, 



Locality. Stations 18, 31, 51, 87 

 and 295. Depth 412—1163 fathoms. 



C. disens occurred frequently at great deptlis. It 

 was found by tlio 'Challenger' near Culebra I. in the West 

 Indies (390 fathoms); and according to Jeffreys, who had 

 bad specimens from the Norw. Exped. for comparison, it 

 was found liy the 'Porcupine' off the Spanish aud Portu- 

 guese coast (304—994 fathoms). 



The spire in most of the specimens from the greatest 

 depths was somewhat eroded, so that several whorls were 

 visiljle. ln uninjured specimens, on tlie other hand, only 

 a depression was to be seen. This species differs from 

 C. alba in its comparatively slenderer, and more cylindrical 

 form. It must be remarked, however, that the specimens 

 from smaller depths, such as at Stations 18, 31, and 87, 

 bore a strong resemblance to C. alba. 



Cylichna inscuipta, Totten. 



Balla insculijfa, Totten, Sillimans Jour. of Sei., vol. 28, 1835, p. 350, tig. 4. 



_ _ Gould, Rep. In vert. Mass., 1841, p. 1(32, tig. 92. 



Cylichna reiiihardti, Mørch, Rink, Dan. Greenland, 1877, p. 43(i. 



— solitaria, Friele, Nyt Mag. for Naturvidensk., vol. 24, 1878, p. 5. 



— reinhardti, Leche, Kgl. Sv. Vet. Akad. Handl., vol. 16, no. 2, 1878, p. 73, Pl. 1. fig. 21. 



— occidfa, Friele, Jahrb. Deutsli. Mal. Gesell., vol. 6, 1S79, p. 283. 



Findested. Jan Mayen, 10 — 20 fv., ^lagdalena Bay, 

 40—60 fv. og station 366. 



Locality. Jan Mayen (10 — 20 fathoms), Magdalena 

 Bay (40— 60 fathoms), and Station 366. 



Cylichna striata, Brown. 



Bulla striata, Brown, 111. Conch., 1827. Pl. 38, fig. 41 & 42. 



Cylichna [iropinqaa, M. Sårs, Christiania Vidensk. Selsk. Forhandl., 1858, p. 49. 



_ _ G. 0. Sårs, Moll. Reg. Aret. Norv., 1878, p. 284, Pl. 18, tig. 5, Pl. XI, tig. 5. 



— scalpta, Leche, Kgl. Sv. Vet. Akad. Handl, vol. 16, no. 2, 1878, p. 73, Pl. 1, tig. 22. 



- reinJiardfi. Aurivillius. Vega Exp. Vet. lakt., vol. 4, 1885, p. 370. 



Findested. Stationerne 223, 224, 260, Tromsø og 

 Alten, 20 fv. Dybde 20—127 f v. 



Cylichnaformerne: insrHlpta, solifuria, ocenlta. rein- 

 hardti og scalpta hov visselig reduceres til to distincte 

 arter, cylichna inscuipta, Totten, og cylichna striata, Brown. 

 Vor opfatning af disse to arter tror vi klart nok vil frem- 

 gaa af ovenstaaende synonymilisler. 



Til sammenligning med vort materiale fra Nordhavs- 

 expeditionen har vi fra Mørch havt cylichna inscuipta fra 

 Gronland, fra Dall c. solitaria fra N. Carolina, fra Kranse 

 c. striata fra Beringshavet og fra professor Sårs c. pro- 



Loeality. Stations 223, 224, and 260, Tromsø, and 

 Alten (20 fathoms). Depth 20—127 fathoms. 



The Cyliclnia forms, inscuipta, solitaria, occulta, rein- 

 hardti, and scalpta, ought certainly to be reduced to 2 

 distinct species, C. inscidpta. Totten, and C. striata. Brown. 

 Our view of these species will, we think, be sufficiently 

 intelligible from the above list of synonyms. 



For the purpose of comparison with our specimens 

 from the N. Atlantic Expedition, Morch sent us C. in- 

 scuipta from Greenland, Dall C. solitaria from N. Carolina, 

 Kranse C. striata from the Beriug Sea. and Prof. Sårs 



