Reviews — Angelinas Silurian Crinoidea. 



409 



however, gives a very high importance to this Monograph, and it is 

 sure to be largely in demand, so soon as its publication is made 

 known, especially for the libraries of museums and scientific 

 societies; to all those interested in Silurian fossils it becomes a 

 necessary work of reference. No more beautiful figures of Crinoids 

 have ever appeared than those so accurately portrayed in Angelin's 

 plates, and the Latin text which accompanies them will render the 

 work of the highest utility. 



The author divides the Crinoidea into two great primary divi- 

 sions, namely, I. Crinoidea proper; 



and 11. Cystidea. 



The " Ckinoidea proper " are again subdivided according to the 

 number of their basal plates into four sections, viz. : — 1. Trimera; 

 2. Tetramera ; 3. Pentamera ; and 4. Polymera. 



The Cystidea are divided into three sections, namely, 1. Apora ; 

 2. Gemellipora ; 3. Pedicellata ; Ehombifera. The author has 

 abolished the termination in ites of genera like Echinosphmrites, 

 Caryocystites, SpJiceronites ; which are printed EcMnosphcBva, Caryo- 

 cystis, Sphceronis ; but the convenience of the termination in ites as 

 a ready means of distinguishing generic names applied to fossil 

 forms from those of existing representative genera (e.g. : Penta- 

 crinus from Pentacrinites) is too generally recognized and has been 

 too frequently used to be easily removed from our Nomenclator 

 Palgeontologicus. 



The following is the classification adopted by the author for these 

 two great groups. 



Genus, CUdochirus, Aug. (2 sp.) 

 ,, Calpiocrinus, Ang. (4 sp.) 

 ,, A.nisocrinus, Ang. (1 sp.) 



Fam. 11. ICHTHTOCEINID^. 



Genus, lehthi/ocrimcStCouiad (3sp.) 

 „ Fycnosaccus, Ang. (3 sp.) 



I. CRINOIDEA PEOPRIA. 

 Section I. Trimera. 



Earn. 1. BRIAROCRINID.ffi. 



Genus, Briarocrinus, Ang. (2 sp.) 

 Earn. 2. Patelliocrinid^. 



Genus, Patelliocrinus, Ang. (9 sp.) 

 Earn. 3. Platycrinid^. 



Genus, Marsupiocrinus, Phill. (9 sp.) 

 ,, Leptoci-inus, Ang. (1 sp.) 

 „ Cordyloci-inus, Ang. 1 (sp.) 



Earn. 4. HABROCRINIDiE. 



Genus, Habrocrinus, D'Orb. (14 sp.) 

 „ Pionocrinus, Ang. (5 sp.) 

 Earn. 5. Desmidocrinid^. 



Genus, Desniidocrinus, Ang. (4 sp.) 

 Earn. 6. AcTiNOCRiNiDiE. 



Genus, Actinocrinus, Miller (9 sp.) 

 „ Periechocritius, Austin (9 sp.) 

 Earn. 7. BarrandeocrinidjE. 



Genus, £arrandeocnmis,Ang. (1 sp.) 

 Earn. 8. Sagenocrinid^. 



Genus, Sagenocrinus, Austin (1 sp.) 

 Earn. 9. TAXocRiNiDiE. 



Genus, I'axoerinus, Phillips (10 sp.) 

 ,, Forbesiocriniis, DeKon.(4sp.) 

 „ Gissocrinus, Ang. (7 sp.) 

 ,, Mijelodactylus, Hall (3 sp.) 



Earn. 10. HOMALOCRINID^. 



Genus, Somalocrinus, Ang. (1 sp.) 

 „ Lecanocrinus, J. Hall (2 sp.) 



Section II. Tetramera. 

 Earn. 1. Calyptocrinid^ { = £uca' 

 It/ptocrinidce.) 

 Genus, Gallocrinns, D'Orb. (9 sp.) 

 „ Eucalyptocrinus, Goldfuss (7 



species). 

 ,, Hypanthocrinus,V\a}LL.{Zs^.) 

 Earn. 2. Corymbocrinid^. 



Genus, Corymbocrinus, Ang. (6 sp.) 

 ,, Abacocrinus, Ang. (4 sp.) 

 Earn. 3. Melocrinid^. 



Genus, Melocrinus, Goldf. (5 sp.) 

 Fam. 4. Cyrtidocrinid^. 



Genus, Cyrtidocrinus, Ang. (1 sp.) 

 Section III. Pentamera. 

 Earn. 1. PisocRiNiD^. 



Genus, Pisocrinus, De Koninck (4 

 species). 

 Fam. 2. Stelidiocrinid^. 



Genus, Slelidiocrinus, Ang. (3 sp.) 

 „ Harmocrinus, Ang. (1 sp.) 

 Earn. 3. CHiROCRiNiDiE. 



Genus, Cldrocrinus, Salter (1 sp.) 



