Revieivs — Queensland Palaeozoic and Mesozoic Fossils. 277 



Mr. Moodie's " interest in these objects is due to the fact that the 

 [Carboniferous] swollen stems must be regarded as the first evidences 

 of disease in geological history ". This is not quite correct. 

 A number of the thecas of Molocystites (—Megacystis) from Indiana, 

 described by S. A. Miller, present circular depressions plainly due to 

 the attacks of some boring organism, and as a result the component 

 plates are usually anchylosed and swollen (see fig. 26 of my " Notes 

 on Yunnan Cystidea " now appearing in this Magazine). Mr. Moodie 

 will also find a description and figures of a stem of Botryocrinus 

 ratnostssimus with small pittings, apparently the work of parasites, 

 accompanied by swellings and by a curious breaking-up of the 

 columnals, in "Crinoidea of Gotland" (1893, Svensk. Vet.-Akad. 

 Handl., Bd. xxv, No. 2, p. 120, pi. vi, figs. 174-8). Plate lxxiv of 

 the Crinoid volume in Barrande's Systeme Silnrien de Bohime (1897) 

 represents several swollen stems from bed f . 2 of Konieprus. All 

 these instances are of Upper Silurian age. 



If nothing of the kind has hitherto been recorded from Ordovician 

 or older rocks, this is due', at all events for our country, to the 

 greater rarity of crinoid-stems and to their less frequent preservation 

 as calcified fossils. It must not be inferred that the Ordovician or 

 Cambrian were golden ages free from disease. Indeed, among stem- 

 fragments from ' the Upper Ordovician Bhiwlas Limestone of 

 Llwyn-y-Ci, north of Bala (Brit. Mus. E 21503) is one that is 

 slightly swollen and shows traces of boring; a similar fragment less 

 clearly preserved comes from the same or a slightly lower limestone 

 at Glyn Ceiriog (E 21495). Anyone with time to search our 

 museums would probably find further examples. 



F. A. Bather. 



IY. — Descriptions of some Queensland Palaeozoic and Mesozoic 

 Fossils. By R. Etheridge, Jun. (1) Queensland Lower 

 Cretaceous Crustacea; (2) Additional evidence of the largest 

 Australian Permo-Carboniferous Trilobite ; (3) A Remarkable 

 Univalve from the Devonian Limestone, Burdekin ; (4) Veto- 

 fistula, a new form of Palseozoic Polyzoa, Reid's Gap. Geol. 

 Survey of Queensland, Pub. No. 260, pp. 26, with 3 pis., 1917. 



(1) The Brachyuran Prosopon etheridgei, H. Woodward, is 

 redescribed from specimens showing portions of the chelipeds and 

 ambulatory limbs as well as the abdominal somites and telson. 

 Hoploparia mesembria, n.sp., is described from a portion of a carapace 

 and six abdominal somites. GlypJicea arbor insularis, n.sp., is based 

 on one fairly complete and one imperfect carapace, and a third 

 specimen showing the abdominal somites and portions of appendages. 

 An imperfect cheliped is referred with doubt to the genus Callianassa. 

 The illustrations, reproduced from photographs, give an excellent 

 idea of the general appearance of the specimens, but a few line 

 drawings would have greatly assisted their comprehension. 



(2) Portions of a trilobite, of which the total length when 

 complete must have been about 60 mm., are referred to the species 

 previously described by the author as Phillipsia grandis, the generic 

 reference being only provisional. 



