THE APSEUDID.^ 321 



time supposed to be without exopods on the first two pairs 

 of limbs. 



Sphyrdpus, Norman and Stebbing (in Sars), 1880, has 

 only five segments of the trunk free, no antennal scale, 

 exopods on the first, and sometimes if not always on the 

 second, pair of gnathopods, and five pairs of pleopods. 



Typhlajjseudes, Beddard, 1886, 'the blind Apiseudes' 

 shares a want of eyes with the genus iSphyrcfJims and with 

 some species of Apseudes. Six segments of the trunk are 

 free. It has a small antennal scale, but is said to be with- 

 out exopod on either first or second gnathopods. There 

 are five pairs of pleopods, in which one of the branches is 

 two-jointed. 



Leiopjus, Beddard, 1886, 'the smooth-footed,' has six 

 free segments of the trunk, a rudimentary antennal scale, 

 a minute three-jointed exopod on the gnathopods of both 

 pairs, and five pairs of pleopods, in which one of the 

 branches is two-jointed. The t}q3e-species, Leiopus lepto- 

 dactylus, is described as having three joints to the palp of 

 the first maxillse, but ' the very short median joint ' 

 seems open to some suspicion. 



The earliest known species of this family is Apseudes 

 talpa (Montagu), first recorded from Devonshire, but also 

 occurring in the Mediterranean. From Apseudes Latreillii 

 (Milne-Edwards), also a British species, it may be distin- 

 guished by the serrate first joint of the first antennae, the 

 spines on the epistome and on the ventral surface of the 

 peraeon-segments, and the elongation of the last segment 

 of the pleon. Other species, such as Apseudes simplid- 

 rostris, Norman and Stebbing, 'taken in 1,263 fathoms, 

 about one hundred miles directly south of Rockall, Forcu- 

 pine Expedition, 1869,' and Apseudes grossimdnus, Norman, 

 from 90 fathoms, long. 11° 40' W. off the south-west 

 coast of Ireland, may be technically regarded as British, 

 but these and others in like circumstances seldom come 

 into the hands of any students but those who will prefer 

 to consult the original memoirs for their characteristics. 

 Sphyrapjus malleolus, Norman and Stebbing, alludes both 

 by its generic and its specific name to the hammer-like 

 24 



