212 
Waclismuth, of BurlingtoTi, Iowa, to wliom I was, in former years, in company with 
the late Dr. P. II. Carpenter,- greatly indebted for very kind and exceptional assistance 
when working out the structure of the Blastoidca. j! • i f i 
Thespccimenifonly the partial impression of a calyx on a piece ot induratea 
shale, hut is still sufficient to show how distinct it is from either of the other Australian 
Blastoids. An ambulacrum is visible, containing a large number of plates, and ig J 
ornate bounding plates. But whether these are radials, or large deltoids, after the type 
of Gramfocrinus derUcr^m, Cr. B. Sby.,* it is difficult to say on account of the state ot 
preservation, but probably the latter will be the correct reading. The summit seems to 
have been moderately large and truncate. Apparently a good deal of lateral pressure 
has taken place, otherwise it is difficult to account for the position and function ot tne 
large elongated plate immediately on the left (PI. 7, fig. 10) of the radial sinus m the 
Loe. and Horizon. Stanwell, near Eockhampton {The late James Smith)— 
Beds. 
Eamily— TEOOSTOBLASTID.^.t 
Genus— TBICCELOOBINUS, Meeh Sf Worthen, 1868 . 
(Proc. Acad. Nat. Sci. Philad., p. 356.) 
TEicmLOcniNUS ? Caepenteei,! sp. nov., PI. 44, fig. 3. 
Sp Char. Calyx large, elongately barrel-shaped, or ovate, bi-pyramidal, attenu- 
ated both dorsally and ventrally ; summit less contracted than is usual in this genus ; 
base rather long, the excavations along the lines of the intorbasal sutures wide and 
shallow, and extending as far as the radio-dcltoid sutures; proximal or ventral section 
probably oval, or almost round, with rather rounded sides ; distal 
indefinitely pentagonal, but more regularly so along a line drawn through the rad la ip • 
Eadial plates large, long, the lateral margins diverging, and giving an expanded appea - 
anceto the plates; bodies more than half the length of the limbs, moderately carinate , 
limbs narrowing upwards, their proximal margins very oblitiue ; ’nterradial mitu 
straight, in shallow concavities ; radio-deltoid sutures deeply Y-shaped, each half str. « . 
sinuses long, narrow, and parallel-sided ; radial lips but little marked. Deltoid plates 
large, elongately and unequally rhombic, more than onerthird as long as thejialy^ 
Ambulacra very narrow and of uniform width, the distal fourth not penetrating 
radial plate; lancet plate long, narrow, and but very gradually tapering ; Vdrospires 
four on each side, pendent for three-fourths the length of the ambulacra, and probably 
retained within the substance of the radi.als for the remaining distal fourth. 
Ol)s. The test, basal plates, mouth, and spiracles are not preserved. Alt o g 
retaining all the general characters of Triecelocrinus but one, the calyx is much mo 
oval and barrel-shaped than any described species of this peculiar genus. eP‘ , 
entirely from the usual type in the possession of very large deltoids; but “ . 
T. ohliquatus, Koemer, are not known, and those of T. MeeUanus show an adyanc 
size on the similar plates in the type species, T. TFoodmani, 1 have determined o^ — 
* Etheridge til. and Carpenter, Catalogue, toe. cit., t. 9, f. 1 and 2. 
+ Etherideefil. and Carpenter, Catalogue, tor. cit., p. 190. , , , ,„f.,;oedin 
% The Writer desires to place on record his mite of testimony to the great loss Biology ® ‘ R.S. 
the early and untimely death of his excellent Eriend and Co writer, Phillip Herbert Carpenter, D.Sa, 
TCn nnp amoimst the latter’s circle of acquaintance was jirobably in a better position to estimate 
-.j, r. ... c.,,— 
association with him for many years in scientific work, and no one has certainly felt his d 
{E. E. Junr.) 
