47 
1881. — Dr. Georg Meyer, in a paper on the “ Rugose Corals of the 
East and West Prussian Diluvial Formation,” adopted Dybowski’s name of 
Acanthodes, placing Try plasma as a synonym under it ; one species was 
described, A. borussicus, Meyer. 1 Notwithstanding Dr. Meyer’s involved 
description, this is clearly a species of Try plasma. The illustrations display 
the typical spined septal lamellae, wide central tabulate area, and the absence 
of dissepiments. 
1881. — Dr. Clemens Sohliiter, like Dybowski, employed Dana’s dubious 
name Calophyllum. lie described a coral from the Striugoeephalus Lime- 
stone as C. paucitabulatum} The corallum is more or less fasciculate, 
consisting of clongatcly conical, or almost cylindrical corallites, sometimes 
united to one another by fistulae. The septa arc quite rudimentary, but still 
of two orders, the tabulae horizontal and very widely separated apart; there 
are neither dissepiments, nor fossula. Reproduction is effected by profuse 
calicinal budding, from three to six buds, having one-half of their walls at 
first in common with the parent calicc. As to the presence of a fossula, 
Dr. F. Freeh 3 believed lie could detect such a depression in a specimen of 
C. paucitabulatum examined by him ; but Schluter subsequently controverted 
this. 4 The latter considered his species to differ from Amplexus in the 
absence of this fossula, distance apart of the tabulae, and the mode of repro- 
duction. This coral bears a most remarkable resemblance to some of our 
Tryplasmcc, a resemblance borne out by the fact that later writers described 
the narrow septal lamellae as spined ; this will be again referred to later. 
1882. — In his more extended and valuable paper on the “ Palaeozoic 
Operculate Corals,” Dr. G. Lindstrom wrote as follows 5 : — It is fitting to 
mention also two others, partly known for a long time, which have been 
found to possess round the outer walls, and at the edge of the calice, exothecal 
structures, to a certain extent homologous with and in all respects comparable 
to the opercula of the former [ C'alceola, Goniophyllum, Bhizophyllum , &c.]. 
The most common is that which forms the genus TholklophyllumA 
Under Tholidophyllum, Lindstrom placed Try plasma, -Lonsdale, and 
Acanthodes, Dybowski, and said t lie genus c ‘ should perhaps have been called 
Tryplasma ; but this name having been founded on an error, according to 
1 Meyer — Sehriften Physik.-Okonomis. Gesellsch. Konigsberg, 1881, Abth. 1, p. 100, t. 5, f. 3-Ca. 
2 Schliiter — Verhandl. Natur. Vereines Preuss. Rheinl. Westfalen., 1881, VIII (4), p. 190. 
3 Freeh — Dames and Kayser’s Pal. Abhandl., 188(1, HI, Heft 3, p. 100. 
4 Schluter — Abhandl. Geol. Specialkarte Preuss. Tliuring. Staaten, 1889, VIII, Heft 4, p. 9 (267), f.n. £. 
5 Lindstrom — Bihang K. Sv. Vet. Akad. Handlingar, 1882, VII, No, 4, p. 63. 
C 
