Ohitnary — Gustqf Lindstr'dm . 335 



Lindstrom to the post (1876). One of his first tasks in this new 

 and more favourable position was the completion and piiblicatiou 

 of the " Fragmenta Silurica" (1880), for which some plates had 

 been prepared by Angelin. There also fell on him the difficult 

 and ungrateful labour, shared with Loven, of editing Angelin's 

 " Iconographia Crinoideorura." These tasks accomplished, Lindstrom 

 found time to attack other groups of Gotland fossils. Thus, in 1884 

 we have from him a beautifully illustrated memoir " On the Silurian 

 Gastropoda and Pteropoda," of importance as indicating the varying 

 nature of the fauna in correspondence with the varying conditions in 

 different parts of the Gotland sea. In 1885 he issued a revision of 

 the trilobites and Merostomata, containing descriptions of many new 

 species, while in the same year he was associated with T. Thorell 

 in a publication that awoke profound interest, namely, the description 

 of a scorpion, Pakeophonus nunciiis, from a bed of Lower Ludlow age 

 at Wisby.^ This was the oldest air-breathing animal then known, 

 but there have since been described Proscorpius, Whitfield, from 

 the Waterlime group of New York, Palceohlatiina, Brongniart, from 

 the Middle Silurian of Calvados, and Protocimex, Moberg, from the 

 Upper Ordoviciau of Sweden. He then turned his attention to the 

 remains of Cephalopoda preserved in a hard, splintery limestone of 

 Southern Gotland, and requiring the utmost patience for their 

 extraction and elucidation. The result of this was the important 

 memoir on " The Ascoceratidse and the Lituitida3," in which he 

 lucidly explained the complicated structure of that extraordinary 

 nautiloid, Ascoceras. The year 1895 produced another discovery of 

 the greatest interest, namely, a Cyathaspis from beds of Lower 

 Wenlock age at Lau in Gotland ; the minute structure of the plates 

 was very fully described by Lindstrom. 



These important memoirs by no means exhausted the activities 

 of Professor Lindstrom. He visited Gotland every summer and 

 pursued his enquiries into its geology, as many minor papers bear 

 witness. On these wanderings through the island he also collected 

 the materials for his arch geological studies. He published a list of 

 the fossils of Gotland, followed by lists of the Cambrian, Ordovician, 

 and Silurian faunas of Sweden. He took an active part in the affairs 

 of the Academy, and occasionally gave popular lectures on subjects 

 of general geological interest. Of recent years, as the burden of age 

 began to press more heavily, he rejuvenated himself (as he expressed 

 it) by visits to Italy, in which both as naturalist and archaeologist he 

 took the greatest possible delight. But this did not cure the gradual 

 failure of eyesight that was his greatest trouble, and rather more 

 than two years ago he finally lost the use of one eye. When I saw 

 him last, in 1899, he was dreading the loss of the other, but was 

 still hard at work, and greatly excited over an important discovery 

 just made in the trilobites. Oddlj^ enough, this concerned certain 

 maculse, believed by him to be vestigial eye-spots, occurring on the 

 hypostome of many genera. This gave rise to the last paper he ever 

 wrote, a wonderfully detailed study of these macular and of the 



^ Another Silurian scorpion, referred to Lindstrom' s genus Palceophonus, has been 

 discovered by B. N. Peach at Lesmahagow, Lanarkshire. 



