Mr. C. Spence Bate on Anoynurous Crustacea. 113 



the temperate latitudes, in tolerably deep water, on the western 

 shores of Europe ; for although extending as far as the Shet- 

 lands, yet the specimens that have been dredged in the colder 

 regions are, we believe, invariably very small, and the inha- 

 bitants of very deep water. 



Among the Galatheoe that we have taken on our coast, and 

 which embrace all that were previously known as British, 

 is one that we think must be accepted as not having been pre- 

 viously described. 



The largest specimen, measuring from the extremity of the 

 tail to that of the extended hands, is little more than 2 inches, 

 of which the animal itself, measuring from the extremity of 

 the rostrum to that of the tail, is little more than 1 inch. This 

 species differs from either of the others in having the large 

 pair of chelate pereiopoda flat and broad, the fingers much 

 curved, very distant, and meeting only at their apex when 

 closed, furnished on the inside with a considerable brush of 

 hairs, and armed near the base of the moveable finger with a 

 prominent tubercle or tooth, but which appears to be of little 

 importance, since it is not able to impinge against the opposite 

 finger. I have sometimes thought that this specimen may 

 only be an extreme form of the male of Galathea squamifera • 

 but the armature of the surface of the hands, which is generally 

 a safe guide in specific character, has a distinct variation. In 

 O. squamifera the arms are covered generally with a series of 

 curved scale-like tuberculations, the anterior margin of which 

 is divided into a series of bead-like elevations, of which in the 

 most typical parts, such as on the surface of the meros and 

 carpus, the central prominence is elevated to a point ; and the 

 whole of the tubercular ridge is crowned by a row of short 

 hairs, so minute that they are not perceptible except by the 

 assistance of a lens. These tuberculations are closely packed 

 and regular. 



In the supposed new species the tuberculations are less 

 prominent and defined, their margins can only be perceived 

 to be at all baccated by careful arrangement of the light, while 

 the cilia, being far less numerous, are yet more conspicuous 

 under the lens. If it be only a variation of G. squamifera^ as 

 we are inclined still to consider it, it is too important a va- 

 riety to be passed over without notice ; and we have named it 

 provisionally Galathea digitidistans^ until the observation of a 

 larger series of specimens than we have as yet seen may en- 

 able us to arrive at a correct conclusion. 



The zoea of the genus Porcellana has, I believe, been figured 

 from exotic species by Dana* ; and having the opportunity of 

 * [Also by Fritz Miiller, ' Fiir Darwin/ p. 35, fig. 24.— Ed.] 



A7m.& Mag. N. Hist. Ser. 4. TW. ii. 8 



