174 A HISTORY OF RECENT CRUSTACEA 
work on the Decapod Crustacea of the Black Sea. The 
book, which is more in Latin than in Russian, contains a 
wealth of bibliographical information, 
Legion 5.—Galatheinea. 
The carapace is elongate, the regions well defined and 
usually rugose, with a prominent and acute rostrum. The 
eyes are placed in very incomplete orbits, the eye-stalks 
short and stout. The first antennz are exposed. The 
peduncle of the second antennz is directed forward and 
generally has the second and third joints coalesced; the 
flagellum is long and slender. ‘The third maxillipeds are 
subpediform, with the third and fourth joints narrow and 
often spinous within. The chelipeds and walking-legs are 
often elongate and slender ; the last pair of legs are feeble 
and inflexed. The sterna of the trunk are broad. The 
pleon is broad and well developed, simply bent, or folded 
on itself, never adpressed to the trunk. In the female the 
second to the fifth segments have each a pair of simple and 
slender ovigerous appendages, those of the second and 
fourth sometimes rudimentary. In the male the pair of 
accessory genital appendages of the first segment are well 
developed, rudimentary, or absent; those on the second 
segment are well developed; the short, usually flattened 
pair of appendages on each of the next three segments, 
are well developed or rudimentary. In one genus the male 
is destitute of appendages on the first five segments. In 
both sexes the appendages of the sixth segment and the 
telson form a swimming fan that is usually powerful. The 
number of branchiz, so far as is known, is generally four- 
teen pairs in this and the preceding legion. There is only 
one family. 
Tne proximity which is now accorded to the three 
legions, the Pagurinea, Porcellaninea, and Galatheinea, in 
spite of external unlikeness, is confirmed, as M. Jules 
Bonnier observes, in a very interesting indirect manner by 
the circumstance that Bopyrids of the same genus Pleuwro- 
crypta occur in all three. 
