ECHINODEIIMATA. 
561 
spepissime 6, rarius 4 aut G, rarissirne 7. Brachia brevia, apiceni versus 
parum atteniiata, ex articulig (bracbialibus) baud numerosis composita, sec- 
tiono transvcrsa semilunaribus, fere eeque longis ac latis, subsymmetricis, 
niargine latero-ventrali rotundato, non in processus elongate. Quodqiie bra- 
chiale alterd sua extremitate articulatione vera (musculis diiobus), altera 
suturR (syzygio) cum articulo proximo conjunctum, itaque facies glenoidales 
musculis prseditse cum iis musculis destitutis per totam longitudinem brachii 
regulariter alternantes. PinnulcB ex articulis brachii epizygalibus (duobua 
primis exceptis) alternatirn dextrorsum et sinistrorsum prodeuntes, lineares, 
apicem versus parum vel fere prorsus non attenuatee, in medio brachii lon- 
giores, ex articulis hand numerosis compositse. Sulcus tentacularis disci 
brachioriim pinnularumque laminis calcareis (e trabeculis reticulatis com- 
positis) marginatus sat magnis, ovalibus, basi affixis, ceteroquin liberis et 
mobilibus, oblique transversaliter positis, utrinque seriem longitudinalerii 
cum opposita alternantem formantibus et tentacula retracta obtegentibus ; 
vesiculse globosae coloratae (velut in Ante^ne obvise) plane absunt. Os 
circulare in centre disci, circulo tentaculorum cinctura — duorum radialium 
ad originem cuj usque sulci tentacularis et duorum interradialium intus ad 
quemque angulum oralem. Teutacula hsec radialia, sicut ea sulcos ventrales 
disci brachioriimque occiipantia, longe exstensilia, tenuia, cylindrica, papillis 
cylindricis brevibus tenuissimis obsita, spicula calcarea irregulariter reticulata 
in cute continentia ; interradialia illis breviora, liexilia, sed ut videtur parum 
extensilia, papillis similibus, sed densioribus, obsita, cute spiculis calcareis 
destituta. Anguli oralcs (i. e. anguli centrales arearum interradialium disci) 
laminae prominentes, erectiles seu quasi valvulae sese aperientes et occludentes, 
lingulatae, calcareae, e trabeculis compositae reticulatis. Etiam cutis mollis 
disci repleta est laminis sparsis calcareis similiter reticulatis, sed multo mi- 
noribus, suborbicularibus aut irrcgularibus et male circiimscriptis. Anus 
apertura circularis areae interradialis medio fere inter os et periplieriam disci 
non tubulosa, margine simplici (baud creniilato). Genitalia in pinnulis 
brachioriim inferioribus velut in Antedone intumescentibus inclusa. 
Rhizocrinus lofotensis, Sars, spec, nov., 1. c. p. 39, pis. 1 to 4. Specimina 
75 visa, maximum circiter 80'"™ longum. Columna 12-70"'™ longa, ex ar- 
ticulis 22-67 composita. Cirri in articulis columnae 3-32. infimis obvii, 
maxinii 8-9'"'" longi. Brachia in maximis 11™'" longa, articulis 28-36; pin- 
nulis utrinque 6-7 (raro 7-8), 3""" longis, articulis 11-12, raro usque ad 15. 
Color animalis pallide fusco-cinereus aut cinereo-albidus. 
Habitat gregatim ad insulas Lofoten (68° 11-16' lat. bor.) profunditate 
100-300 orgyarum, nec non in Sinu Nidarosiensi (63° 35') ubi specimen 
mortuum in profunditate 80 orgyarum inventum est. 
It is probable that this is the species described by Pourtales (1. c. p. 128) 
as Bourgueticrifius hotessieri, D’Orb. D’Orbigny’s specimens were from the 
recent breccia of Guadaloupo, the same which contained tlio well-known 
human specimen now in the British Museum. Count Pourtales’s specimens 
were obtained from depths of 237-248 and 306 fathoms, off the Samboes and 
off Sand Key, on a bottom of Glohigerincc and other deep-sea Foraminifera. 
OphiocrinuSy gen. nov.. Semper, 1. c. p. 68. Five wholly undivided arms, 
springing directly from the central boss. Cirri ventral, sixteen, in a single 
row; cirri-joints 18-20; with the exception of the central boss there are no 
other ossicula. Length of arms 80 millims., cirri 9 millims., diameter of 
