BIBLIOGRAPHY OF PALAOZOIC CRUSTACEA 49 
Isochilina cf. canaliculata Krause. Primitia distans Krause, P. cf. bursa Krause. 
P. Schmidtit Krause, P. elongata Krause, P. elongata var. obliqua Steusloft, P. binodis 
n. sp., P. cf. canaliculata Steusloff. Entomis cf. sigma Krause, E. cf. obliqua Krause, 
E. oblonga Steusloff, E. imperfecta n. sp. Placentula Jonesit n. sp. Bollia minor 
Krause var. ornata n. var. Tetradella harpa Krause. Ctenobolina rostratae Krause, 
C. rostrata var. cornuta n. var. Bythocypris cf. symmetrica Jones. 
Krejci (J.) O trilobitech. 
Ziva 11, 1854, pp. 83-89, plate 3. 
Dalmanites socialis Barr. Trinucleus ornatus, Icidaspis mira. 
Kutgen (Carl). Die Trilobiten des K. G. TH. naturhistorischen 
Museums. 
Publicat de 1, Instit. Roy. grand-ducal Luxembourg, Sec. Sci. Nat. vol. 16, 1877 
pp. 127-142. 
Proctus Cuvieri Steininger. Phacops latifrons Bronn. Dalmanites caudata Emm. 
Homalonotus platynotus Dalm., 1. delphinocephalus Murch., H. laticauda, H. Knightii 
Koenig, H. obtusus Sandb., H. crassicauda Sandb. Calymmene Blumenbachii Brong. 
) 
Lake (Philip). On the British species of Acidaspis. 
Quart. Jour. Geol. Soc. London, vol. 52, pp. 235-245, plates 7-8. 
The author describes and illustrates the following species: 
Acidaspis Brighti Murch., 4. coronata Salter, A. deflexa n. sp., A. crenata Emm., 
A. quinquespinosa Salt. MS., A. Barrandei Fletcher & Salter non Angelin, 4. Hughesi 
Salt. MS., 4. erinaceous Marr & Nicholson, 4. callipareos Wyv. Thomson. 
The author remarks the British species which have been described have in many 
eases been imperfectly figured, and the result is endless confusion. 
The common English trilobite 4cidaspis coronata has received abroad no less than 
three names, all of them different from ours. In England the foreign name 4 cidaspis 
crenata is often applied to a species which is quite distinct from the original Acidaspis 
crenata, 
The author remarks in regard to the synonymy of Acidaspis coronata that it is 
known in England by the name of 4. coronata, as A. Marklini in Sweden, and 4. 
mutica in Germany; Murchison’s term guadrimucronatus is older than any of them. 
Even the name of the genus itself is matter of controversy. Murchison’s Silurian 
System, p. 653, employed the term Acidaspis, and in the same year Emmrich, De Tril. 
Diss. inaug., p. 53, proposed the name Odontopleura. ‘This controversy depends on the 
publication of Murchison’s and Emmrich’s terms Acidaspis and Odontopleura. 
A copy of Murchison’s Silurian System was presented to the Geological Society 
London, Jan. 9, 1839. This would indicate that the book was published early in Janu- 
ary, 1839. Captain Portlock, in his address delivered at the 8th annual meeting, Geo- 
logical Society of Dublin, Feb. 14, 1839, remarks he had been favored with a copy of 
the work in sheets, prior to its general publication. Jour. Geol. Soc. Dublin, vol. 2, pt. 
1, 1839, p. 29. 
Emmrich’s paper bears the date, April, 1839. 
There is, however, an earlier name still, the use of which has been advocated by 
Vogdes (Proc. Nat. Sci. Phila., 1877, p. 138); also afterwards by Clarke (10th Rep. 
N. Y. State Geologist, 1891, p. 61). This name is Ceratocephala Warder (Am. Jour. 
Sci., vol. 34, 1838, p. 377). Dr. Lake remarks that “even if its rival be eligible, 
Acidaspis has been so widely used for so long a time that here at least I do not pro- 
pose to adopt any other.” 
