464 



MR. G. S. BRADY'S MONOGRAPH OF 



spines, the last two very long and subequal, fourth and sixth about half the length of 

 the second ; third, fifth, seventh, and all the rest very slender and short. Eyes black. 

 Length ye 



Hab. Taken abundantly in the to wing-net at C umbrae, chiefly at night time {Mr. D. Robertson) ; 

 Northumberland coast, Shetland, Plymouth Sound, and amongst Zostera, between tide-marks at 

 Herm {Rev. A. M. Norman). 



Though the description given above differs in some minor points from that of G. O. 

 Sars, I have no doubt that the species referred to is the same ; and, indeed, a British 

 specimen which I forwarded to that author for examination was identified by him with 

 P. longicornis. There is much variety in the spinous armature of the posterior margin ; in 

 most cases one short spine exists near its lower extremity, and rarely one likewise at the 

 upper angle ; not unfrequently they are altogether wanting. I have not been able clearly 

 to make out the structure of the maxillary apparatus, nor have I seen any males recog- 

 nizable as such. 



The figure and description given by Mr. Norman {loc. cit.) are certainly referable to 

 this species, though, owing to their being taken from worn specimens, they are not quite 

 applicable to the species when seen in good condition. There can, I think, be little 

 doubt that Dr. Baird's description and figures of " Oypridina interpimcta " are properly 

 to be identified with P. longicornis, Lilljeborg. 



Genus 2. Cylindroleberis, Brady*. 



Shell elongated fusiform or subcylindrical ; beak rounded, not at all produced ; upper 

 antennae of the mcde bearing at the apex two excessively long, annulated, plumose 

 setse, four shorter setee, and a short curved claw ; penultimate joint bearing at its apex 

 a stout densely ciliated seta ; upper antenna of the female terminated by a stout curved 

 claw, and six or seven subequal plumose setae, which do not exceed in length that of the 

 last four joints of the antennae ; penultimate joint bearing at the apex a short seta or 

 pedicle, from the extremity of which spring six long simple setse. Second joint of the 

 natatory branch of the lower antennae in the male elongated, in the female scarcely 

 longer than the succeeding joints; secondary branch in the male robust, subchelate, 

 terminal joint slender, curved upwards; in the female simple, triarticulate, last joint 

 setiform. Antepenultimate joint of the mandibular foot shorter than the following 

 joint, bearing three long subequal curved setae, two of which are plumose; penultimate 

 joint armed with five stout setae on the anterior, and two at the apex of the posterior 

 margin ; last joint very short, armed with a curved claw and several setae. Pirst maxilla 

 consisting of a broad subquadrate or crescentic lamina, densely clothed on its distal 

 margin with long bristles ; second maxilla swollen at the base, suddenly narrowed 

 towards the apex, the apical portion bearing six plumose setae, three of moderate length, 

 and three short, basal portion having a series of ten simple spine-like setae on its convex 

 margin; third jaw narrow, elongated, set along the whole of the inner margin with 

 short simple setae, which increase in length towards the apex ; oviferous foot terminating 

 in two symmetrical dentate lips, and bearing about six pairs of spinous setae. 



* Intellectual Observer, vol. xii. p. 127. 



