On some Recent Publications concerning Diatoms. 27 



Note. 



During the passage of this paper through the press I re- 

 ceived a small consignment of Arachnida from Mr. Richard 

 Crawshaj, who collected them in Basutoland. Amongst them 

 were two examples of a new species of Palystes which may 

 be diagnosed as follows : — 



Palystes Crawshayi^ sp. n. 



? . — Colour of dorsal surface a fairly uniform greyish 

 brown, obscurely mottled like the back of tarsi ; pale clypeal 

 band on base and two superior external pale bands on man- 

 dible ; sternum yellow, with two black bands ; coxse yellow ; 

 femora greyish black below, conspicuously spotted with 

 yellowish grey ; epigastric area yellow ; a transverse black 

 band behind the epigastric fold, the rest of the lower surface 

 dark red variegated with white spots. 



Vulva with a deep and wide excavation, which is almost as 

 wide as long, with its lateral margins converging and almost 

 meeting in the posterior middle line ; the anterior half of the 

 space occupied by a skeletal piece, which is irregularly trans- 

 versely oblong in shape and attached by a narrow " stalk " 

 running from the middle of its anterior border to the adjacent 

 anterior rim of the excavation, and laterally by a membranous 

 piece to the anterior part of the lateral rim. 



Total length 25 millim. ; length of carapace 11. 



Loc. Maseru, in Basutoland. 



Closely allied in colouring &c. to P. lunalus, perornatus^ 

 and Leppance (see p. 23, antea), but differing in the form of 

 the median sclerite of the vulva, which has its posterior 

 border transverse and not produced. It resembles luaatus in 

 the presence of two sternal bands and the other two in the 

 spotting of the femora. 



III. — Notes on some Recent Publications concerning Diatoms. 

 By P. T. Cleve and C. Mekeschkowsky. 



1. G. Kaksten. " Die Diatomeen der Kieler Bucht." 

 Wissenschaftliche Meeresuntersuchungen herausge- 

 geben von der Kommission in Kiel : 1889, i.to. 



This in many respects important publication will no doubt 

 be for a long time a vade mecum for all students of living 

 diatoms. The observations of the author concerning the 

 formation of auxotpores cannot be overestimated, and the 



