II. Arbeiten von speciellerem Character etc. 2. Asteroidea. 183 



be compared with, that of the family Cyclocystoididae, and here the analogy in 

 structure, with other families in the class Echinodermata, so far as known ceases 

 The terminal end of the coil being unknown has led to the suggestion of the pos- 

 sibility of its having been connected with the vault of a crinoid, but as no genu, 

 is known having any such appendage, and some classification seeming desirable 

 this family has been proposed. Miller ( 5 ^) ; hierher Myelodactylus. 



Phaenosckisma n. g. Calyx elongately clavate or obclavate ; the number and dis- 

 position of the plates and general composition of the ambulacra similar to those 

 of Pentremites. The oral plates are very small, inconspicuous, and always con- 

 fined to the summit, where they are either horizontally placed or inclined inwards. 

 The radials bear three more or less distinct folds diverging from the lips ; and the 

 two contiguous limbs forming the anal side are more or less abortive. Eadial 

 sinuses wide and deep generally with steep sides. Spiracles as distinct apertures 

 absent, the hydrospires opening externally by a series of elongated slits with inter- 

 vening ridges, distributed in subparallel series on the sloping sides of all the 

 radial sinuses ; they are either both radial and oral or only radial in composition ; 

 and being only partially covered by the ambulacral plates, their distal ends (or 

 even the entire length of same) are visible on the sides of the radial sinuses. 

 Lancet-plate concealed by the side plates (in all but one species); outer side 

 plates very small. Anus a separate opening, and further removed from the sum- 

 mit-centre than in Pentremites. Column , when compared with the size of the 

 calyx, larger than in the last-named genus. Etheridge nnd Carpenter ( 32 ); hier- 

 her Pentremites acutus Phill., caryophyllatus de Kon., Phaenoschisma Verneuili n. 

 und Ph. Archiaci n., welche beide eingehend beschrieben werden. 



Schizoblastus n. g. Calyx resembling that of Granatocrinus in form and composition 

 of the ambulacra. Oral plates of variable size, but usually small. Spiracles 

 double, being linear or oval clefts between the lancet-plate and notched edges of 

 the orals, further removed from the peristome than in Pentremites, and not floored 

 by the oral plates (as in the latter genus) ; those in the anal interradius may or 

 may not be confluent with the anal aperture. Etheridge und Carpenter ( 32 ) ; hier- 

 her Pentremites melo 0. u. Sh., Sayi Sh., Granatocrinus mclonoides Meek u. Worth., 

 pisum M. u. W., neglectus M. u. W. , glaber M. u. W., granulosus M. U. W., Pen- 

 tremites missouriensis Sh., Granatocrinus projectus M. u. W. und Pentremites Potteri 

 Hambach. 



2. Asteroidea. 



Bell ( 4 ) ist nicht rnit Greeff darin einverstanden, daft Asterias africana Mull. u. 

 Trosch. von glacialis 0. F. Mull, als besondere Art zu unterscheideu sei, sondern 

 gelaugt auf Grund der groBenVariationsfahigkeit der von GreefF benutzten Unter- 

 scheidungsmerkmale zu der Ausicht, dafi beide Formen zusammeugehoren. 



Bell ( 5 ) weist nach, daC die fur die Systematik der Asterien wichtige Disser- 

 tatio sistens species cognitas Asteriaruin Lundae 1805 nicht, wie fast allgemein 

 angenommen, von A. J. Retzius herriihrt, sonderu unter des Letzteren Presidium 

 von Nicolaus Bruzelius veroffentlicht worden ist. 



Bell ( s ) beschreibt uud bildet ab aus der Sammlung des British Museum als 

 neu: Calvasterias antipodum von der Reise des Erebus und Terror; Cribrella 

 minuta von Ecuador; Mithrodia victoriae von der Victoria - Bank , 20 45' S., 

 3727' W., 39 Fad en ; Fromia tumida von Ceylon. Verf. erwahnt ferner ein 

 5armiges Exemplar von Fromia indica Lin. 



Carpenter ( 10 ) beschreibt und bildet ab 2 Exemplare von Oreaster bulbiferus 

 Forb. aus den oberen Kalkschichten von Bromley, Kent. 



Jourdain ( 3y ) behauptet nach Beobachtungen an Asterias, daB die bisher als 



