Vol. 54.] THE DECAPOD CKtTSTACEA OF ENGLA:N'D. 23 



margins, opening forward and outward, and occupying the outer 

 thirds of the orbito-frontal border. Most of the other characters 

 correspond with those of H. Eclwardsii. Length of carapace =10 

 to 16 mm. 



Affinities. — This species is readily distinguished from II. Edwarclsii 

 by the smaller size and more compressed form of the carapace, the 

 absence of areolar tubercles, the much smaller branchial lateral 

 process, and by the situation and direction of the cervical sulcus. 



Distribution. — Cambridge Greensand and Grault of Folkestone. I 

 have three specimens in m)^ collection from the Cambridge Green- 

 sand, and one from the Gault of Folkestone ; the latter agrees 

 precisely with a specimen in the British Museum labelled ' Sheppey ' 

 (Gardner Coll. No. 59811). 



Genus Goistiochele, Bell. 



GONIOCHELE ANGULATA, Bell. (PI. I, fig. 6.) 

 1858. BeU, Monogi-. pt. i, p. 26 & pi. iv, figs. 3-9. 



Sujpjplementary . — A nearly straight row of five areolar tubercles 

 crosses the cephalic region opposite the second antero-lateral 

 marginal process. In many specimens the longitudinal striation of 

 the urogastric lobe is not observable. Penultimate segment of the 

 female abdomen twice longer than any of the anterior segments, 

 resembling in this character the abdomen of Xantliopsis and some 

 other genera. Sternal plastron broadly ovate, two-fifths the width 

 of the carapace. Episternum considerably longer than wide, much 

 produced, pointed, minutely granulated. 



Distribution. — Specimens from the London Claj^ are in the 

 Woodwardian Museum, the Museum of Practical Geology, the 

 Ipswich and Warwick Museums, etc. Specimens from the Eed 

 Crag (derivative) are in the Woodwardian and Ipswich Museums. 



Family Kaiiinoidea. 

 Genus KAifiifA, Lamarck. 



The characters of the genus Hanina, established by Lamarck in 

 1801, are well marked and recognizable. The general form of the 

 carapace is indicated by the figure here given (PL I, fig. 7). The 

 orbito-frontal border is remarkably wide ; the dorsal surface in 

 most of the species is singularly sculptured by numerous trans- 

 verse, minutely serrated markings, or is finely stippled. The 

 sternum is peculiar in conformation ; the episternum is widely 

 trifid, and the posterior portion is narrow — almost linear. 



The genus is represented by living species and by 18 or 20 

 extinct forms from the foreign Tertiary and Cretaceous beds, but I 

 am not aware that the occurrence of any representative of it in 

 the British rocks has been recorded hitherto. .A valuable history 

 of the genus and full notice of the fossil species is published by 

 Reuss.^ 



^ ' Zur Kenntniss foss. Krabben,' Denkschr. k. Akad. Wissenscb. Wien, vol. xvii 

 (1859) p. 19. 



