88 MESSES. NORMAN AND STEBBING ON THE 



and the spines robust ; meros with a single spine on the lower margin ; carpus with two 

 spines on the lower, and a distal spine on the upper margin ; hand with two spines above 

 and four on the palm, cilia alternate with these palm-spines ; finger contorted, at first 

 curving downwards, and then at half its length bent backwards, in the middle of its outer 

 margin a long slender spine and a minute cilium, on the inner side a single denticle. 



Last peraeopod (l.prp 5 ) short, the joints broadly flattened, basos scarcely more than 

 twice as long as broad, not spined or setose ; ischium minute, rudimentary, meros with 

 three long plumose setae on the back, and six long simple cilia and a distal spine on the 

 front margin ; carpus ovate, with five long plumose setae on the back, and four long 

 spines and about seven simple long cilia on the front margin ; there are also two spines 

 on the side, the spines of the front margin are serrulate on the edge towards their 

 terminations ' ; hand ovate, rounded at the extremity, not more than two and a half 

 times as long as broad, with four long serrulate-edged spines on the distal part of the 

 back, and one similar spine on the palm, the whole of the palm and rounded end of the 

 joint pectinately fringed with closely-set lancet-shaped spines ; these spines differ from 

 those of allied species in being longer, acutely pointed at the extremity, and serrulate on 

 both sides ; finger slender. 



Length 6 millim., or about a quarter of an inch. 



Dredged in the Mediterranean off the African coast by the 'Porcupine' in 1870, 

 Station 40. The depth we are not able to give, as there were three dredgings at this 

 station which were in 51, 152, and 510 fathoms. 



A very remarkable character in this species is the twisted character of the finger of 

 the second gnathopod (i. gn 2 ). The first impression on seeing such a form was that it 

 was a monstrosity, an impression only removed when it was found that the fingers of 

 this pair of legs in the two specimens procured were all of identical structure. 



5. Apseudes obtusifeons, n. sp. (Plate XVIII. fig. n.) 



Frontal region (n. d) not only truncate, but even emarginate, without any indication 

 of a rostrum, the anterior margin being folded underneath instead of porrected. 



Ocular processes narrow, much produced, terminating in attenuated spine-points. 



Carapace square in its front portion, but expanding with arched sides at the first 

 coalesced pevaeon-segment ; the second peraeon-segment very similar in form to the 

 coalesced first segment, though distinctly articulated; coxal spiny process very long 

 and acute. Each of the remaining perseon-segments has a pair of acute anterior lateral 

 spine-like points projected at right angles to the body ; while the epimeral processes, 

 which overhang the coxa? of the limbs, have a small spine on the front side. The 

 epistoma bears an acute spine (n. l), and a median spine arms the under surface of the 

 last two segments. 



1 It requires a T *j- or i-ineh object-glass to show the structure of these and similarly curiously formed 

 spines referred to in these descriptions. 



