184 
CKUSTACEA. 
a large horizontal spine on the carpus j all ambulatory feet with slender dac- 
tyli. A. alexmidrif sp. n., Quicksands, Florida, 74 fathoms : id. 1. c. pp. 152 
& 153. 
Matutidas. 
Osachila^ g. n. Allied to Hepatus in all essential characters, but differing 
notably in the shape of the carapace, which is nearly as long as broad, with 
the front much produced, and has a very uneven surface, exhibiting 6 chief 
protuberances. O, tuberosa, sp. n., Florida reefs, 36-68 fathoms ; id. 1. c. 
pp. 154 & 156. 
IjEUCOSIDiE. 
Iliacantha, g. n. Closely allied to Ilia, but having 3 spines (one median) at 
the posterior extremity of the carapace, and the hands twisted, so that the 
fingers open in a vertical plane. 1. subc/lohosa and sparsa, spp. nn., Florida 
reefs, 30-60 fathoms : id. 1. c. pp. 156 & isO. 
Myropsis, g. n. Nearly allied to Myra, but more globular, with 3 posterior 
spines and no median or hepatic ridges ; outer margin of the maxillipeds 
straight j basal joint of the antennulm crested. M. quinquispinosa, sp. n., 
Florida reefs, 21 and 82 fathoms : id. 1. c. pp. 156 & 167. 
Callidactylus, g. n. Outer margin of the exognath of the outer maxillipeds 
convex; basal joint of the antennulas with no indurated crest; ambulatory 
feet naked, penultimate joint compressed, with a laminiform crest above and 
below ; dactyli of the 3 anterior pairs 3-edged, of the posterior 2-edged. C. 
aspet', sp. n., Florida reefs, 16-37 fathoms : id. i. c. pp. 157-169. 
Lithadia cadaverosa, sp. n., id. 1. c. p. 159, Florida reefs, 36-40 fathoms. 
ANOMURA. 
Lyttkens (Act. Lund. v. pp. 43-111, 2 pis.) has given a very 
copious and detailed description of the skeleton and the muscles 
of Lithodes maia, often quoting those of the lobster for com- 
parison. It is, however, to be regretted that he has not finally 
summed up the principal resemblances and dissimilarities which 
this genus has on the one side with the Brachyura and on the 
other with the Macrura. 
The long-known connexion of some spp. of Payurus with others of Actinia, 
Ilydractinia, and Sponges (Suberites domuncnla), attached to dead shells, is 
discussed at gveat length, and some new facts of similar fossil occurrences in 
tertiary and cretaceous strata are added, by Des Moulins, Act. Soc. L. Bord. 
xxviii. pp. 825-356. 
Porcellana ? Zoea-like larva described by A. Dohrn, Z. wiss. Zool. xxi. 
p. 372, pi. 29. figs. 48-51. 
MACRURA. 
Ohantran has continued his observations concerning the development of 
the Crayfish and its moults. 0. R. Ixxiii. p. 220 ; abstracted in Ann. N. II. 
(4) vii. pp. 219 &'220 (c/. Zool. Rec. vii. p, 194). 
