

su 



PAItltnT. 



Pvi:i:-'T 



I'AKMKY. I'ITI.. -! ) ivfiLj 



i/S. I.KTIH-U.] 



1'A ICM. I .Y I'l KKT, the common ume tor Aldiemilla arrauii. 



PAILSMP. PI^INU-A.] 



PAKTHKXIl M. ll'YHETHHUM.] 



1'AKTHKNOI'E. [PjkRTHUloriOJL] 



PAHTHKXUPin.fi, oc ParUunofimi ot Milne-Edwards. This 

 tribe, in the arrangement of M. Milne- Ed wards, corresponds nearly to 

 Ui genus Partknoft a* eUblUbed by Fabricius, but the species are 

 separated by MilueK.limr.li into the genera I'umalomtu, E*rynomt, 

 lamina, Partkno,*, and Oryptopodia, forming a natural group which. 

 in the opinion of the last-named loologwt, establishes the passage 

 between the Maians [MAIID.K] and the Cyclometope*. 



The following are the character* of this tribe : Carapace ordinarily 

 triangular, and hardly longer than it U wide; iU latero posterior 

 border* in general nearly tranevtrse, and the latero-anterior border* 

 following the same direction a* the edge* of the rostrum ; but the 

 lateral parti of the carapace are sometimes rounded, and iU surface U 

 nearly always bossy and tuberculous. Ilostrum in general small and 

 entire, or only notched at the end; the eyes are neatly always per- 

 fectly retractile; the basilary joint of the external antenna- sometimes 

 presents the same disposition as in the Maians, but in the great 

 majority of eases it U quite otherwise ; it is short, and is not joined 

 to the neighbouring parts of the shell ; iU external border does not 

 concur to form the lower orbital wall, and ita extremity does not 

 reach to the front ; the moveable stem of these antenna: is short, and 

 takes iU origin in a gap of the internal orbital angle. The epistome 

 is much wider than it is long, and the form of the external jaw-feet is 

 nearly the same as in the Maims. The anterior feet are very much 

 developed, and widen so as nearly to make a right angle with the 

 body : in the male they are always more than twice as long as the 

 post-frontal portion of the carapace, and sometimes four times as long ; 

 the hand is nearly always triangular, and the claw suddenly curred 

 downwards, so that its axis forms a very marked angle with that of 

 the hand. The succeeding feet are, on the contrary, short ; the 

 second pair in general are less than once and a half of the length of 

 UM post-frontal portion of the carapace, and the others progressively 

 diminish. The abdomen in the male presents considerable differences 

 in the number of distinct joints, whilst in the female there are always 



PAKTHKNOPinjE. 



Ill 



The tribe U widely distributed, and species are found in the Kngliah 

 Channel, the Mediterranean Sea, and the Indian Ocean. 



*mtttomu (Edwards). This genus, in the opinion of the last- 

 named author, establishes in some sort the passage between the Steno- 

 rhynche and the Acheans on one side, and Etu-ynome, Lambrui, and 

 Pertknmpr, n the other. 



The carapace is nearly pentagonal, as in Parlhenope, but it scarcely 

 ever goes beyond the level of the third pair of feet Body depressed ; 

 rostrum very wide and very much advanced, and divided at ita 

 extremity only ; eyes very short, their peduncle entirely filling the 

 orbita, which are circular, a character which again approximates this 

 genus to the Stenorhynchs ; internal antenna: bent back very obliquely 

 outwards ; external antenna) but little developed ; their first joint 

 does not distinctly concur in the formation of the lower wall of the 

 orbit ; their moveable stem arises in the slit which the two internal 

 angles of that cavity leave between them nearly as in the Parthenopes, 

 M their terminal joint is very short. 



S. ttigtr is the only known species. It is remarkable for the great 

 prolongation on each side of the carapace ; these points are directed 

 outwards, and their base occupies the whole of the hepatic region. It 

 i a native of the coast* of China. 



Xwnmtmt (I/each). This genus, In the opinion of M. Edwards, 

 eeUMUcMs the paeaage between the lambritmA the other Oxyrhynchs. 

 The general form of the body and iU aspect approximates theee 

 as to PaHknoft, whilst the dUposition of their external 

 i limiUr to what in wen in Main. The carapace nearly 

 ir, with a rounded base, very much embossed and covered 

 with esperHiea. Rostrum borUonUl and divided into two triangular 



Kyes email ; orbits deep, their upper border very projecting, 

 and separated from the external angle by a slit The internal antenna- 

 bent back longitudinally ; the fint joint f the external ones termi- 

 nating at toe internal angle of the orbit and supporting the succeeding 

 joint at the upper edge of its extremity, so that the moveable stem of 



these antennae, which 1s prolonged under the rostrum, appears to 

 spring from the internal canthus of the eye. 



K. turpera has the carapace with the region* very distinct, rugose, 

 with a great triangular tooth at the external angle of tin- >.rl 

 three or four smaller ones along the lateral border on the bra 

 region ; moveable stem of the external antenmc very short, and it* two 

 firtt joints very small 



It is a native of the coasts of Noirmoutier and of the British 

 Channel, at rather considerable depth*. 



M. Milne-Edwards refers to the . icutata of M. Risgo, from the 

 Mediterranean, as having much in common with the species above 

 noticed ; but the details are not, in his opinion, sufficient to enable ua 

 either to refer it with certainty to this genus or to distinguish it from 

 K. ruyota. 



Lambrtu (Leach). Carapace nearly as long as it is wide, roiin.l. d 

 on the sides and narrowed forwards; branchial region* very much 

 developed, tumid, and separated from the median portion of the 

 carapace by a deep furrow ; stomachal region, on the contrary, very 

 narrow ; upper surface of the edge of the shell always mure or less 

 tuberculous or spiny. Nostrum small, but rather advanced. Eyes 

 perfectly retractile, and orbits nearly circular, the walls of these 

 cavities presenting a fissure above and a wide and deep gap below the 

 internal cauthua of the eye. The internal antenna; bend back obliquely, 

 and the fosaets which lodge them are in general continuous with the 

 orbits, for the space which separates the internal angle of the lower 

 orbital border from the front is far from being filled by the peduncle 

 of the external antenna), whose first joint is extremely small and 

 scarcely longer than it is wido ; the second is more elongated, but 

 never reaches to the front, and advances between the basilary joint of 

 the internal antenna; and the internal border of the lower wall of the 

 orbit ; the third joint has its origin in the gap which occupies the 

 internal angle of this cavity ; and the fourth or terminal filament is 

 very short. 



The species are found in the Mediterranean Sea and Indian Ocean, 

 where they live among the rocks at considerable depths. 



A. Carapace nearly as long as it is wide, 

 a. Carapace rugose, covered above with spines or tubercles. 



a.* Four first pair of feet having the third joint armed with 

 spines. 



Ex. L. lonyimantii. It is found nt Pondicherry, Amboyna, &c. 





