S. Woodward — New British Fossil Crustacea. 495 



I am indebted to my friend James Carter, Esq., of Cambridge, for 

 sending me, some seven years since, a drawing of the caudal seg- 

 ments of a Crustacean, preserved in the Woodwardian Museum, 

 which was believed to be, and was published at the time (with a 

 note of interrogation), as referable to the genus Squilla} 



This specimen was obtained from the chloritic marl (Lower 

 Chalk) near Cambridge. About the same period, my late la- 

 mented brother, Dr. S. P. Woodward, F.G.S., when on a visit to 

 Mrs. Smith, of Tunbridge Wells (shortly before the death of that 

 venerable lady, and most excellent naturalist), obtained for me 

 further evidence of this same Crustacean, in. Mrs. Smith's museum,* 

 from the G-rey Chalk of Dover. Since that time, by the kind interest 

 of W. Whitaker, Esq., E.G.S., of H. M.. Geological Survey of Eng- 

 land and Wales, I have obtained the loan of two other specimens of 

 this fossil from the Hard Chalk-rock of Luton, in Bedfordshire, col- 

 lected by J. Saunders, Esq., of that place. 



Having since been kindly allowed by Professor Sedgwick to ex- 

 amine and compare the Cambridge example with those subsequently 

 obtained, and also with the recent genus Squilla, I arrived at the 

 conclusion that it was not among the Stomapods, but among the 

 Isopods, that we must look for the allies of our Cretaceous fossil. 



All the four fossil specimens exhibit, under a pocket-lens, the 

 same peculiar pitted and wrinkled ornamentation which the artist 

 has attempted to convey in Plate XXII., Figs. 3-6. This peculiar 

 kind of ornamentation I found especially repeated in the JEgid,(g, the 

 species belonging to which family are amongst the largest known 

 Isopods, and are distinguished by " having their antennse fixed in 

 front of the head, the basal joint of the anterior pair being very 

 broad and flat, and uniting together to form a margin in front of the 

 head, not being concealed beneath the advanced cephalon ; the outer 

 foot-jaws have the basal joints moderately dilated, with three or 

 four terminal joints, which are rarely palpiform. ;. the pereiopoda 

 (thoracic feet) are of moderate length, the anterior pair being gene- 

 rally the strongest, and fitted for prehension, being, terminated by a 

 robust curved finger, acute at the tip ; whilst the hind-legs are 

 gradually elongated and fitted for walking. The five segments of 

 the pZeon {abdomen), are very short, each on its underside supporting 

 a pair of double foliaceous plates for respiration, whilst the last seg- 

 ment of the pleon (telson ?) is large and flat, and bears on each side, 

 near the base, a pair of flat appendages, scales arising from a basal 

 joint, of which the inner angle is sometimes produced into a long 

 style." 3 



I have figured an example of this family, the 2Ega monophtlialma, 

 Johnston (PI. XXIL, Fig. 7), for comparison with the fossil remains. 



1 See Salter and Woodward's Chart of the Genera of Fossil Crustacea, section 

 Stomapoda, etc., fig. 19. Engraved by J. "W. Lowry, and now sold by J. 

 Stanford. 



2 The specimen was presented at the time by Mrs. Smith, of Tunbridge Wells, to 

 the British Museum, 



3 C. Spence Bate and J. 0. Westwood, Hist, Brit. Sessile-eyed Crustacea, Part 17, 

 June, 1867, p. 275. 8vo. Van Voorst. 



