50 SAN DIEGO SOCIETY OF NATURAL HISTORY 



LAKE (Philip)— Continued 



Warder's species Ccratocepliala goninta belonss to the same group as Acidaspis 

 ^^esiculosn Barrande. 



Beyrich's Odoiiiopleuro Brn^lilii is identical witli .7. quiuqurspinosa Salter MS. 



The Trilobites of the Bokkeveld Beds. 



Ann. South African Mus.. vol. 4, part 4, 1904, pp. 201-220, 5 plates. 



Phacops pnpillus n. sp., I', arhutnis n. sp., P. cr'ista-iiaUi Woodw., /'. africanus 

 Salter, P. ocellus n. sp., /'. imprcs.uis n. sp., /'. (Crypliaeuxj caffrr Salter. Phacops sp. 

 Dnlmaniifs lumcitus n. sp. Dalmaniies sp. Proctus >nnl(uus n. sp. Typhoiiiscus Raini 

 Salter, llomnloiiolus llfrschdi Murch., //. fjurrnus n. sp., //. colossus n. sp. Homa- 

 lonotus sp. 



Several of these species were described by Salter, Trans. Geol. Soc, series 2, vol. 

 vii, 1856; also by Henry Woodward, Quart. Jour. Geol. Soc., vol. xxix, 1873; and by 

 Dr. Freeh, who describes a Homalonolus which he believed to be new, in Lethaea 

 Geognostica Th. 1, Bd. ii, I,eif. 1, 1897, p. 2l8. //. prrarmatus n. sp. 



■ On Trilo])ites from l^olivia. 



Quart. Jour. Geol. Soc. London, vol. 42, 1906, pp. 425-430, plate XL. 



Pcltura sp. Symp'iysurus opolniiista n. sp. Trinuclcus holhv'icusis n. sp. Ogygia. 

 Phacops cf. nrhutcus Lake. Dalmau'itcs Paituna \\. & R., D. maccuniia Clarke. Dal- 

 mariiics sp. 



The earlier genera show affinities with the conteniperaneous European faiuia. 



The Devonian species are much more closely allied to those of South Africa and 

 North America. 



The ('aiiihriMn Tri]ol)ites. 



A Monograph on the British Cambrian Trilobites. Palseontographical Society, 1906, 

 part 1, pp. 1-28, plates 1-2. 



Agnosfus fissus Lundgren, A. punctuosus Ang. (The Agnostus scarahacoidcs Salter, 

 as described by Hicks, is clearly only a flattened and imperfect specimen of this species.) 

 The Agnosfus scutalis Hicks. Quart. Jour. Geol. Soc, vol. 2'^, pi. v, f. 9, is a beautiful 

 tail of A. punctuosus Ang. 



Agnostus Dm'idis Salt., A. rxaraius Gron\\aIl. (The A i^unslus scutalis as described 

 by Hicks, Quart. Jour. Geol. Soc, vol. 28, p. 175, pi. v, figs. 12 and 13, and probably 

 figs. 11 and 14, not figs. 9 and 10, includes at least two distinct species. The de- 

 scriptions of the heads corresponds with Gronwall's species, but the tail is apparently 

 based on a specimen of A. punctuosus.) 



Agnostus reticulatus Ang., ./. pisiformis Linne, A. pisiform is var. obesus Belt, A. 

 triscctus Salt., A. alius Gronwall, A. Rarrandei Salt., A. rotundus Gronwall, A. nudus 

 Beyr., A. Eskriggei Hicks, A. Rarlo^i Belt. 



Section Limbati : (a) Regii Agnostus camhrrnsis Hicks. (b) Fallaces Agnostus 

 integer Beyr., A. sccurigcr n. sp., ./. fallax Linnrs., ./. rudis Salt., A. sidcnbladhi 

 Linnrs., A. cal-vus n. sp., A. dux Callaway, .7. Callavei Raw MS., .7. cyclopyge Tull- 

 berg, A. ohtusus Belt. 



Section Parvifrontes: Agnostus truncatus Brogger. 



A Monogra])]! of the British Trilobites. 



Part 2, Palasontological Society, 1907, pp. 29-48, plates 3-4. 



Agnostus incertus Brogg. Microdiscus Salter (non Emmons). 



The genus Microdiscus was first established by Emmons Am. Geol., vol. 1, pt. 2, 

 p. 116, pi. 1, fig. 8, for a small trilobite to which he gave the name of Microdiscus 

 quadricostatus, which Dr. Lake refers to Trinucleus and takes Salter's Microdiscus 

 puuctatus for the t\ pe of the genus. 



