REPORT ON THE ANOMURA. 123 



acute teeth on each side, the first of which is slightly smaller than the others ; the merus 

 of the external maxillipedes is longer than the ischium, and its inner border is armed 

 with two acute and subequal spines near the distal end. All the specimens are imperfect, 

 but several detached chelipedes preserved in the same bottle, which I believe belong to 

 this species, induce me to regard it as distinct from Galathea intermedia. The hand is 

 somewhat swollen, and in all cases the immobile finger is bent, so that a hiatus often of 

 considerable size exists between the fincrers, whereas in Galathea intermedia the whole 

 chelipede is extremely slender, and the fingers are in contact along the whole of their 

 inner margins. A closer examination also shows that in the Challenger specimens the 

 rostrum is slightly broader, the latei-al teeth are of larger size, and the terminal acute 

 spine is shorter than in Galathea intermedia. I do not, however, feel justified in 

 assigning a new name to the species, but regret at the same time that the lateness of 

 this discovery prevents me from figuring any of the specimens. 



Genus Munida, Leach. 



Munida, Leach, Diet. d. Sci. Nat., t. xviii. p. 52, 1820. 

 „ Desiuarest, Consid. sur les Crust., p. 190, 1825. 

 „ Dana, U.S. Explor. Exped., ■vol. xiii.. Crust., part i. p. 478, 1852. 



Bell, Brit. Crust., p. 206, 1853. 

 „ Stimpson, Proc. Acad. Nat. ScL Philad., p. 70, 1858. 

 „ Heller, Crust, sudlichen Europa, p. 192, 1863. 

 ,, Miers, Catal. New Zealand Crust., p. 68, 1876. 



Rostrum slender and styliform, with a well-developed supraorbital spine on either 

 side of its base. Carapace with the surface usually spinulose and the cardiac area as a 

 rule distinctly circumscribed. Chelipedes and ambulatory limbs elongated and slender. 

 One or more of the abdominal segments usually with a series of spinules on the anterior 

 dorsal margin. 



At the date of publication of the Histoire Naturelle des Crustaces only a single 

 species, the common European Munida rugosa (Fabricius), was known to science, which 

 Milne-Edwards, following the example of many of the older writers, placed in the genus 

 Galathea. With the exception of the striking difference in the form of the rostrum 

 and supraorbital spines, it is evident that the two genera share many features in common. 

 Recent deep-sea investigations have increased the number of species from about half a 

 dozen to upwards of thirty, and have shown at the same time that the genus has an 

 extended bathymetrical distribution, some at least of the species reaching a depth of over 

 1000 fathoms, while the majority are found most abundantly at depths varying from 

 100 to 300 fathoms. The appendages of the first abdominal segment are occasionally 

 absent in the male.^ 



' They are absent in tlie following species -.—M^mida normani, Henderson, Munida squamosa, HenierBon, Munida 

 granulata, Henderson, and Munida scabra, Henderson. 



