Neiv Species of Floseidaria, &e. By Dr. C. T. Hudson. 613 



its bristles. The large egg shown in fig. .5 was, when I first saw 

 i*'., quite smooth ; and was separated by a clear space from its outer- 

 most covering. After a little while the outhne of the egg grew 

 wavy, owing to small protuberances which projected into the clear 

 space, and which by focusing I could see extended all over its 

 surface. The growth of these protuberances was quite perceptible 

 at the end of every ten minutes or so, and in two hours' time they 

 had grown long enough to stretch almost across the clear space 

 that separated the two coverings of the egg. They were stouter 

 than mere hairs, but cannot be effectively rendered on the small 

 scale of fig. 5. 



Steplianops armatus n. sp. mihi. Plate XII. fig. 6. 



This three-spined Stephanops was first found by Mr. J. Hood 

 in Eoscobbie Loch, in August 1884:. I have not seen it ; and the 

 figure I have given is copied from a drawing of Mr. Hood's. Its 

 specific distinction lies in the presence of two posterior lateral 

 spines, along with one long dorsal one. 



As this genus has received several additions lately, I here 

 subjoin an analysis of its species. 



* No dorsal spine. 



"Without posterior spines . . StepTianops muticus Ehrenberg. 

 "With two „ >, • • 'S'. cirratus Miiller. 



"With three „ » • • S. lamellaris Miiller. 



** "With a dorsal spine. 



■IT..,, . . • • (two toes,. 8. lonoispinatus Tatem, 



N\ ithout posterior spmes <,■, . a • / n n- 



^ ^ Uhree toes o. umseta Colnns. 



"With one posterior spine 8. hifiircus Bolton. 



With two posterior spines 8. armatus Hudson. 



Besides these there are 8. ovalis Schmarda and ;S^. tridentatus 

 Fresenius ; but I have not seen the descriptions of tliese. Possibly 

 the latter of the two may be the same as 8. armatus. Mr. J. E. 

 Lord's three-toed Stephanops f is I think probably Dr. CoUins'a 

 8. uniseta. 



Pomphohjx sidcata n. sp. Bolton. Plate XII. figs. 7 and 8. 



This new species difiers from ^Mr. Closse's P. complanata in the 

 shape of the lorica. In this laiter the lorica is greatly compressed 

 dorsally and ventrally, so as actually to bo concave at the median 

 line on both surfaces. But in P. sulcata the dorsal and ventral 



t Microgcopical Xewn, iv. (1S81) p. HC, fig. 24. 

 Per. 2.— Vot.. V. 2 H 



