Notes on Ehrenherg's Foraminifera. 565 



= "Pi. turgida, 1838, in part." 41, PL angusta. 4:2a, b, PI. annu- 

 losa. 43, PL lepto stigma. 44, 45, PL ampla. 47, PL ampliata.) 

 46, PL euomphala is a slightly keeled Cristellaria cultrata. 48, PL 

 umbilicata is Pidvinulina truncatulinoides, D'Orb., sp., seen from the 

 upper (flat) surface. 49 and ? 60, PL heteromphala, seem to be 

 small varieties of Planorbidina farcta, approaching PL (Truncatidina) 

 lobatida ; such are not rare in the Chalk. It is difficult to correlate 

 the many small PlanorbulincB and TruncatidincB, from the Chalk, 

 figured by D'Orbigny, Eeuss, and Ehrenberg. Fig. 49 is perhaps 

 comparable with D'Orbigny's Botalina umbilicata from the Chalk, 

 which we are inclined to refer to Botalia proper, though with some 

 doubt. 51, Botalina umbilicata is a side view of Pidv. truncatidinoides, 

 D'Orb., sp. Not quite so angular in its profile as the recent specimen 

 figured in "Hist, nat.des lies Canaries, etc. Foraminiferes," pi. 2, 

 figs. 25-27. This species is figured also by Soldani, " Testaceo- 

 graphia," vol. i., p. 58, pi. 46, fig. nn. It is a variety of Pidv. Menardii, 

 and closely related to Pidv. Micheliniana and Pidv. crassa, both found 

 in the Chalk. See "Philos. Transact.," vol. civ., p. 393. 52, 

 Plamdina picta = Pulv. Micheliniana, D'Orb., sp. See above, p. 510. 

 Figs. 53-58 are young, and 59 an adult, Globigerina cretacea, D'Orb., 

 a rather discoidal form of Gl. bulloides, D'Orb. Young flattish 

 Globigerinos closely resemble young Planorbidime. (53, Botalia 

 quaterna ; 54, B. rosa; 55, B.pachyomphala ; 56, B. globosa-ampliata . 

 hi, 58, B. aspera ; 59, Globigerina cretce, referred with doubt to GL 

 bulloides in 1838.) Figs. 60-64 are young and arrested specimens 

 of Planorbulina farcta. (60, Botalia globidosa-tenuior =^ " B. Glob., 

 1838 " ; 61, B. senaria ; 62, B. densa ; 63, B. glomerata =z " B. 

 senaria?" ; 64, B. cretcB, rough-shelled.) Spongiliths and Coccoliths 

 occur among the other figures on this plate. 



i?,:b^s7"i:b"ws. 



I. — Letters and Extracts prom the Addresses and occasional 

 Writings of J. Beete Jukes, M.A., F.E.S., F.G-.S., late Local 

 Director of the Geological Survey of Ireland. Edited, with 

 connecting memorial notes, by his Sister. London : Chapman 

 and Hall. 1871. pp. 596.' 8vo. With a Portrait. 



AS in military service, "the place of honour is the place of 

 danger," so in Science, the men who by their earnest labours 

 occupy its foremost ranks, acting as pioneers to smooth our path, 

 are likewise risking their lives for us, aud not unfrequently pay all 

 too dearly for the transitory honours they enjoy. 



For Professor Jukes — whose memory, so dear to geologists, this 

 book is intended to keep alive, — may certainly be claimed the merit of 

 having been always at the front. From the time he left Cambridge, 

 when, inspired by Professor Sedgwick's zeal, he set forth on foot 

 to walk through the length and the breadth of England geologizing ; 

 he began to teach others, and we find him lecturing first in one 

 town and then in another, often to crowded audiences ; for, what- 



