80 DUBLIN NATT7EAL HISTOBT SOCIETT. 



shorter in proportion to the length of the animal, rounded instead of 

 compressed at the sides, wanting the membranous dilatation on tlie under 

 edge outside the eye, and hence, much 8hallo^yer, and differently 

 armed. It differs from the only other described form, P. no/rwhal, in 

 having the superior anterior half of the rostrum free from spines or teeth. 

 A third species has been recorded, but only a figure of it published by 

 C. Spence Bate, F.L. S., in the ''Natural History of Swansea," published 

 in the ** Reports of the Swansea Literary Society," under the name of 

 P. Jeffreysii. I was at first inclined to consider my specimen this species, 

 but an examination of specimens kindly furnished me by its describer, 

 C. Spence Bates, led me to doubt the correctness of my first belief; that 

 gentleman also appears to doubt it. I deem it better, then, to describe 

 mine, provisionally only, under that name, at the same time suggesting 

 the name P. Leptorhynchus, should mine prove distinct. 



P. Jeffreysii (Spence Bate), according to a communication of his to 

 me, is tolerably common in Scotland. The original specimens were taken 

 in Oxwich Bay, Swansea; they were two in number, but imperfect at the 

 time figured. They were described at the British Association Meeting 

 at Edinburgh, but only the name published. Mr. Spence Bate has also 

 taken it at Plymouth, and has received it from the Rev. Mr. Gordon, of 

 Moray Frith, as a new species. Some of the specimens from thence have 

 only seven teeth above and two below, instead of eight above and two 

 beneath, which is the usual number. 



The specimen now described approaches closely Sippolyte panda- 

 liformis, and affords another proof of the close affinity of the genera Pan- 

 dalus and Hippolyte. 



P. LEPTORnrxcHUS {mihi). Patjdalus Jeffreysh (?) {Spence Bate.) 



P. P, annulicorni affine rostro tenui subrecto vix carapacem dimidio 

 Buperante undecim spinulis supra annate; infra quadri denticulate; apice 

 bifido. 



Colore : rubro. 



Habitat : in zonam laminariam, " Sandycove," prope *' Dublin." 



c 

 c, rostrum, much enlarged ; d, internal antenna, much enlarged. 



Narrow-leaked JEsop Prawn. 



Closely allied to P. annulicornis. Beak narrow, slightly turned up 

 at end ; scarcely exceeding half length of carapace ; anterior half desti- 



