BIBLIOGRAPHY OF PALAEOZOIC CRUSTACEA 49 



Isocliilina cf. canalicidata Krause. Piimitia distans Kraiise, P. cf. bursa Krause. 

 P. Sclimidtii Krause, P. flonf^ata Krause, P. tlmig^ta var. ohlifjtia Steiisloff, P. blnodis 

 n. sp., /'. cf. caiKdiculala Steusloff. Eiiloniis cf. sigma Krause, K. ( f . ohliqua Krause, 

 E. oblonga Steuslof]', /:. imprrfci la n. :i|i. Placcntula Jnufsii ii. sp. Boliia minor 

 Krause var. oriiata ii. \'ar. Trtradrlla liarpa Krause. ('Acndlmlina rnslralac Krause, 

 C rostrafa var. corntila n. var. liy/bocypris cf. symmctrud Jones. 



Krejci (■).) O tnlohittM-li. 

 Ziva n, 1854, pp. 83-89, plate 3. 

 Dalnmnitcs sodalis ]5arr. TrinucU'iis ornclus, Jridaspis mira. 



Kutgen (Carl). Die Trilohitcn dcs K. <!. 11. iiatiu'liistorisclicii 

 Museums. 



Publicat de 1, Instil. Roy. graml-disca! I .iixemhourg. Sec. Sci. Nat. vol. 16, 1877, 

 pp. 127-142. 



Proetus Cuvirri Steiniiip;er. Phaaips Inlijrons lironu. Dalmaiiilcs caudnta Emm. 

 liomalonntus platynotus Dalm., //. drlphinncrphalus iMurch., //. laluauda, II. Kniglitii 

 Koeriig, //. oblitsus Saiidb., //. ciass'uauda Sandii. Calymmciic Hltimnibac/iii Brong. 



Lake (Philip). On the Hritish speeies of Acidaspis. 



Quart. Jour. CjcoI. Soc. London, \ol. 52, pp. 235-245, plates 7-8. 



The author describes and illustrates the following species: 



Acidaspis Briglili Murch., A. cnronata Salter, ,/. deflrxa n. sp., A. trcnata Kmm., 

 A. quinquespinosa Salt. MS., A. Rarrandc: I<"letcher & Salter non Angelin, A. Uugliesi 

 Salt. MS., A. crinaccoits Marr & Nicholson, ./. lallipareos W\v. Thomson. 



The author remarks the British species which have been described have in manv 

 cases been imperfectly figured, and the result is endless confusion. 



The common English trilobite Acidaspis cnronata has received abioad no less than 

 three names, all of them different from ours. In England the foreign name Acidaspis 

 crenata is often applied to a spe<:ies which is (juite 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 ./. coronata, as //. Marklini in Sweden, and A. 

 mutica in (jerrnan}'; Murchison's term (jiiadrimucronatus is older than any of them. 



E\en the name of the genus itself is matter of controversy. Murchison's Silurian 

 S\stem, ji. 653, employed the term Acidaspis, anil in the same year Emmrich, De Tril. 

 Diss, inaug., p. 53, proposed the name Odontopleura. 1'his controversy depends on the 

 publication of Murchison's and Emmrjch'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, 18 39, 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 pajier bears the date, .'\pril, 1839. 



There is, however, an earlier name still, the use of which has been advocated by 

 \'ogdes (Proc. Nat. Sci. Phila., 1877, p. 138); also afterwards by Clarke (lOth Rep. 

 N. Y. State Geologist, 1891, p. ol). I'his 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 wideK* usetl for so long a time that here at least 1 do not pro- 

 pose to adopt any other." 



