38 NEW YORK STATE MUSEUM 



The paper contains special articles on the following subjects: 

 Favosites turbinatus Billings, in which the character of 

 the opercula is discussed ; Plumalina plum aria Hall, pre- 

 senting evidence for a reference of this problematic fossil to the 

 Alcyonaria ; Inocaulis lesquereuxi ( Grote & Pitt) , in 

 which this Bertie waterlime fossil, hitherto referred to the algae, is 

 considered a graptolite ; Climacograptus parvus is 

 shown to have possessed a compound colonial stock, such as has 

 been made known before of genera of Diplograptus, Glossograptus 

 and Lasiograptus. A note onParopsonema cryptophya 

 and Discophyllum peltatum discusses the nature of 

 these problematic fossils ; the early growth stages of Devon- 

 aster eucharis are described, and Palaeosolaster 

 (?) gyalum shown to be a Lepidasterella. The generic char- 

 acter of Ptilonaster, Hallaster and Squamaster are discussed with 

 the aid of the type material in the State Museum. In Stenaster 

 salteri (Billings), one of the earliest starfishes, the dorsal 

 integument is recognized and the presence of an anus, which closed 

 in later starfishes, suggested. 



In Klasmura a stelleroid is described which is distinctly 

 transitional to the ophiuroids in many features, especially in the 

 nearly complete closing of the ambulacral furrow by an integument 

 and by a column of ventral plates. The mollusks and brachiopods 

 of the Pittsford shale and Bertie waterlime are described and the 

 bearing of this associated fauna on the probable marine habitat of 

 the eurypterids is set forth. The relations of a variety of forms 

 described as Conularia, Serpulites, Sphenothallus, Enchostoma and 

 Torrellella are discussed in a note, as also the probable nature of 

 Spathiocaris. The presence of eyes in Pseudoniscus is shown ; and 

 additional parts of the Utica shale eurypterid Schizognathus are 

 described. There are also described two new starfishes from the 

 Silurian of the Argentine Republic, one of them representing a newi 

 genus. Dr P. E. Raymond has furnished the description of a new. 

 large form of Ceraurus C. ruedemanni of the Chazy lime- 

 stone. 



The study of material being put on exhibition led also to the 

 discovery of evidence that many trilobites possessed besides the 

 large, compound or lateral eyes, small median or parietal eyes upor 

 the glabella. It was found that about thirty genera possess the 

 tubercle upon the posterior portion of the glabella, which corre- 

 sponds to the median eye of the lower crustaceans. Where it if 

 best developed, as in the "blind " Cryptolithus (Trinucleus), it ever 

 possesses a lens; in most other genera, however, it is merely a 



