Vol. 56.] AND CICEROCRINUS. 207 



slit-like openings at the sides of the arms, which are absent in 

 Brahmacrinus. 



Brahmacrinus cannot well be assigned to either of the families 

 considered ; it is possibly an annectant form, uniting the Melo- 

 crinidce and the Platycrinidae, and may indifferently be associated 

 with either. 



Diagnosis of Brahmacrinus. 



Calyx having the same composition as in Platycrinus, but dis- 

 tinguished by the incorporation of the single costal and the two 

 distichals. The costal and first distichal are suturally united with 

 an interradial of the first series. Anal tube excentric. Anal inter- 

 radius distinguished from the remaining interradii by additional 

 plates in the first interradial series. 



Br. ponderosus. Type-species. 



Plates of the calyx thick, those of the dorsal cup especially so, 

 separated by deep grooves, corresponding with the sutures, which are 

 slightly impressed. Radial plates with a crescentic excavation, 

 Arms twenty (5 x 4). Carboniferous Limestone. 



II. Cicero crinus elegans, gen. et sp. no v. 

 (PI. XVI, figs. 3 & 4.) 



A single specimen of this elegant little crinoid was found in the 

 Grindrod Collection, bearing the label ' Crinoid, new, ? Cheiro- 

 crinus,' but without locality or any indication of the horizon from 

 which it was obtained. Since, however, it was placed in a drawer 

 full of Wenlock fossils, and is embedded in a matrix of limestone 

 crowded with Silurian species, it may be referred with great pro- 

 bability to the Wenlock Limestone. The stem, of which 15 mm. is 

 visible, is round and smooth, and composed, at least just below the 

 cup, of a great number of simple disciform ossicles ; in a length of 

 4 mm. twenty discs were counted. In diameter the stem measures 

 25 mm. 



The cup is conical, smooth, and devoid of ornament; it measures 

 13 mm. in height and 6 mm. in maximum breadth, that is, at 

 the upper margin. In general appearance it much resembles an 

 elongated form of Pisocrinus, such as P. pocillum, Ang. 



The basals are five in number (fig. 3, p. 268); of these, three 

 are each suturally united above with two radials ; the remaining 

 two are each in contact with one radial only : thus the right 

 posterior basal meets the middle of the base of the radi-anal marked 

 Pi,' in Mr. Bather's paradigm of Pisocrinus, 1 and Az. by Wachsmuth 

 & Springer ; while the left posterior similarly meets the middle of 

 the base of the left posterior radial. 



The relative position of the left posterior basal constitutes the 



1 ' Crinoidea of Gotland.— pt. i. Crinoidea Inadunata' Kongl. Svenska 

 Vetenskaps-Akad. Handl. vol. xxv (1893) No. 2, p. 25, fig. 2. 



