INVERTEBRATA. 



327 



two species of Palceaster and two of Pt-otaster, which have been ob- 

 tained from the U. Devonian of Pilton, N. Devon, and which are pre- 

 served in the Museum of Practical Geology. Finally cites 14 species 

 of Asteroids and Ophiuroids from the Palaeozoic rocks in completion 

 of a former list of the known Palaeozoic forms of these orders (Geol. 

 Mag. vol. vi. p. 241). H. A. N. 



Woodward, Henry, and E. Etheridge, Jun. On some Specimens 

 of Dithyrocaris from the Carboniferous Limestone Series, East 

 EHbride, and from the Old Eed Sandstone of Lanarkshire. Geol. 

 Mag. dec. 2, vol. i. pp. 107-111, pi. v. (Continued from Novem- 

 ber, 1873, p. 486.) 

 Describe three new species from the Carboniferous shale overlying 

 the Calderwood Cement-stone of the East-Kilbride district, Lanarkshire, 

 — D. ovalis, D. gramdata, and B. glabra; also a new species i>. ? 

 striata, from greenish-grey shales of the Old Eed Sandstone, at Car- 

 michael Bum, S.E. of Lanark. Express the opinion that Dithyrocaris 

 may be broken up into two sections which may prove to be of generic 

 value. In one section are forms like D. Scouleti, D. Colei, and D. ovalis, 

 in which the carapace is entire in front, or only slightly indented or 

 curved in outline. In the other group are forms like B. granulata 

 and D. glabra, in which the carapace is more or less deeply indented 

 anteriorly and posteriorly, so as to cause it to Separate more readily 

 along the mesial line. H. A. N. 



Wright, Dr. Thomas. Monograph on the British Fossil Echinoder- 

 mata from the Cretaceous Formations (vol. i. part 6). On the 

 Echinoconidae (pp. 185-224, pis. xlv.-lii.) Palaeont. Soc. vol. 

 xxvii. for 1873. 

 Gives descriptions, with figures, of five species of Discoidea and Echi- 

 noconus. All the species described have been previously recorded. 

 Defines the order Echinoconidce, and discusses at length the synonymy 

 of several of the genera of the Echinoidea. Gives a translation of that 

 part of Dr. Breyuius's rare * Dissertatio physica de Polythalamiis, de 

 Belemnitis, de Echinis,' which relates to the Sea-urchins, and shows 

 that many generic names which have long been current must be aban- 

 doned in favour of the older names of Breynius. H. A. N. 



Wright, Dr. Thomas. Petrefacten aus der Ehaetischen Stufe bei 

 Hildersheim. [Ehaetic fossils from Hildersheim.] Zeitsch. deutsch. 

 geol. Gesell. Bd. xxvi. Heft iv. p. 821 ; part of plate. 



Describes a new starfish, as Ophiolepis Damesiiy from Ehaetic beds, 

 discovered by H. Eoemer. 



Young, Prof. John, and John Young. New Carboniferous Polyzoa. 

 Quart. Joum. Geol. Soc. vol. xxx. pp. G81-683, pis. xl., xli. 



Propose a new genus, Actiriostoma, and a new species, A. fenestra^ 

 turn, for a new Carboniferous Polyzoon belonging to the group of the 

 FenestelUdce. The polyzoary in this form closely resembles that of 

 Fenestella, being fenestrated and poriferous on one face only. There are, 



