538 MR. E. J. MIERS ON [June 6, 
5. On Crustaceans from the Mauritius.—Part II. 
By Epwarp J. Mirrs, F.LS., F.Z.8. 
[Received June 1, 1882.] 
(Plate XXXVI.) 
Of the interesting Crustaceans of which I submit descriptions as 
a sequel to my former paper on Crustaceans received by the British 
Museum from M. V. de Robillard, the first to be mentioned, a Pal- 
nurus, was taken in a fishing-net at a depth of 40 fathoms. With 
it were sent, with other marine animals, a specimen of a species of 
Dromia (apparently D. vulgaris') completely covered with a sponge 
of the genus Dysidea ; and also a specimen of Lysiosquilla maculata, 
one of the commonest and best-known of the Oriental Squillidee, of 
which, however, there were previously no specimens from the 
Mauritius in the British-Museum collection, and which is marked as 
“rare”? by M. Robillard. 
The Crawfish, of which a detailed description follows, and which 
belongs to the restricted genus Palinurus of Gray”, I regard as 
specifically identical with a West-Indian form long since described 
and roughly figured by Parra* under the designation ‘‘ Camaron 
de lo alto,” which M. H. Milne-Edwards? has briefly described as 
Palinurus longimanus from a West-Indian type in the collection of 
the Paris Museum. M. Guérin-Méneville® also mentions this spe- 
cies, but without adding any thing to our knowledge respecting it ; 
and yet more recently Dr. Edward v. Martens® has published a few 
remarks upon a male example obtained at Cuba by Dr. J. Gundlach. 
Thus the West-Indian habitat of P. Jongimanus is established beyond 
question. 
The original description of Parra, although of considerable length, 
is, as might be expected in so early a work, insufficient from a 
scientific point of view ; but as far as it goes it is applicable in almost 
every particular to the species from the Mauritius. Nevertheless, as 
1 J have already, Ann, & Mag. Nat. Hist. (ser. 5) v. p. 870 (1880), remarked 
on the occurrence of this species in the Oriental region. 
? T may observe here that Dr. G. Pfeffer, in a memoir on the Palinuride in 
the collection of the Hamburg Museum (Verhandl. des naturwissenschaftlichen 
Vereins von Hamburg-Altona, v. p. 30, 1881), has proposed for the subgenus 
Panulirus of Gray (ined. ?) and Heller (1865), which includes by far the greater 
number of known Crawfishes, and has been generally adopted, the new desig- 
nation Sexew. This name cannot be adopted, haying been long ago preoccupied in 
the class Aves ; and I will add that, in my opinion, it would be productive of much 
inconvenience were a generic name liable to altefation merely because (asin the 
present instance) itis composed of the transposed letters of another name ; to cite 
only one instance, it would then become necessary to name nearly all the older 
genera of Fish-lice (Cymothoide). 
a ee de diferentes Piezas de Historia natural, &c., p. 154, pl. lv. fig. 1 
787). 
* Histoire naturelle des Crustacés, ii. p. 294 (1837). 
° “Anim. Articulés,” in R. de la Sagra’s Hist. de l'ile de Cuba, p. xciii (1857). 
§ Archiv f, Naturgeschichte, xxxviii. p. 125 (1872). 
