BTBI>IOGRAPHY OF PAI..T]OZOIf' CRITSTACEA 55 



LINDSTROM ( G.)— Continued 



N ileus, Syinp/iysiiriis, ? Oi^yfihi. c — (lalymmfnr, llninalnnolus. d — C.lie'irurtts pro 

 parte. 



Cjroup 2 — riie whole maculae is of a spongious or irregularly polyliedric structure 

 showing prisms in \ertical sections. .Luip/iiis, Isotelus, Megalaspis, Ptyi/iof>yi;e, N'lohe? 

 Megaltispides? Barrandia, IlUiriins Liclms, Troditints .^ Platyrni'to/'its Encrinuriis also 

 probably belongs to this group. 



CJroiip 3 — Maculae with well-clevelopeii globular lens on t!ie interior thiril of the 

 maculae; the blank part of the maculae without any structure. In such species as 

 ('hririirus spi/iulosus the whole maculae covered with lenses, liroiiti'us, ('.lieirurus 

 spi/iitlosiis. 



(j'roup -I — riie maculae form sunk pits, \vith smooth bottom. Structure vuiknown. 

 Dahrui/iiips. 



(Iroup 5 — The elongate, straight maculae, carrying on their innermost point from 

 3 to 5 diminutive segregate ocelli, situated on a clear, while I'yatch. Proetus. These 

 ocelli have not been observed on the related genera C\ pliaspis, I'liaetonides, P/iillipsia 

 and Ciriffithidcs, but they may be preliminarl\' ranked here in conseciuence of their 

 close conformity. 



Group 6 — The maculae ha\e in this group been reiluced to a jiair of tiny ocelli, 

 situated high up on the hypostoma, near its anterior margin. Phatups, .haste. 



Loomis (F. B.) The dwarf fauna of the ])yritp layci- a1 the horizon 

 of IIh' Tully limestone in Western New Yoi'k. 



Bull. Ne\v York Mus., No. 69, pp. 892-920, plates iv, 1903. 



Crypluieus Boolh'i var. raUitrles (ireene, Beyrlcli'ia ditgoii Clarke. Eiitomis prosenhina 

 u. sp. 



Lorenz (Tli.) Beitriige znr Geohigie nnd l^ahvontologie von Ostasien 

 tinter be.sonth'rer Berucksisclitigung dcr Provinz Schantiing. in (Miina. 

 2 l^ihieontoh)giselier Teil. 



Zeitschrift der Deutsch. CjcoI. CjCs., 1906, jip. 67-122, with 3 plates and 5 5 figures 

 in text. 



The author attaches classificatory imiiortance to the minute structure and super- 

 ficial ornamentation of the test, which has led him to change the generic allocation of 

 man\ well known species, and to institute many new genera. 



Lorenz, on account of the different structure or ornamentation of the test, divides 

 the group C'onocephalites into two genera: Conocephalina and Concephalites, but the 

 type ('.. Emmriclii Barr. of the latter he puts into the former, thereby making needless 

 confusion. Conocephalina Brogger has as its type C. ornata Briigger, and the author 

 has referred to it several English species placed by Salter in Conocephalites, such as 

 C. invita. 



'IMie author illustrates Ptyclmpcria striata V.\\\. and places tlie genus Solenopleura as 

 a synonym to Htychojiaria, figuring Solenopleura hrachymetopus Angelin. 



'l^he author remarks in regard to the new genus I-ioparia, that it has medium-sized 

 eyes, in common with both Ptychoparia and Liostracus ; likewise the deep dorsal fur- 

 row of Ptychoparia. In relation to the shell structure and the flat selvage, it is on 

 the side of Liostracus. On careful consideration one must admit that Liostracus is in 

 closer relation to the species Lioparia, than that of the genus Ptychoparia. 



He refers ConoeeplialUes minutus Mall to the genus, and uses Lioparia lateli/nhatiuri 

 i')aines, with one new species, /.. hlaittoeides, as the type of the genus. 



Trachyostracus new genus: Is distinguished by inedium-sized wide-apart e\es, flat 

 selvage and little or no dorsal furro\\s. In its outer form it is not to be distinguished 

 from Liostracus. The difl"erence in the genera lies alone in the different ^hel! struc- 



