so 



DUBLIN NATXTEAL HISTOBT SOCIBTT. 



The following analysis gives the external characters of the various 

 species as far as known. The species in italics are not British. 



[M. g. — median gastric region i L g. — lateral gastric ; br. « branchial.] 



The first specimens of this species were obtained by me, Dec. 7, 1 856. 

 from the fishermen's boats, along with the following other Crus- 

 tacea: — C. vulgaris (?), C. sculptus, Hippolyte varians, II. Thompsoni, 

 H. Cranchii(i), Pagurus Hynd^nanni, P. Cuanensis,£urynome aspera, and 

 many zoophytes, inhabitants of the coralline zone. On a subsequent 

 occasion, in Februaiy, I dredged the species in 30 fathoms of water, 

 along with the following Echinodermes : — Ophiocoma neglecta, rosula, 

 helli8,granulata; Urasterglacialis, in great abundance; U. violacea, ruhens, 

 mre ; Echinocyamus pusiUus, Cucumaria Hyndmanni. The specimen of 

 C. AUmanni then obtained was in ova. 



In characterizing this interesting new species, I have united to it 

 the name of one of our Irish naturalists, whose labours in every branch 

 of Irish zoology may be appreciated from the frequent occurrence of his 

 name in the late William Thompson's ** Notes on Irish Natural His- 

 tory," and by the monographs published by himself in the Annals and 

 Transactions of many learned societies, — Professor George J. Allman, 

 now of Edinburgh, late Professor of Botany in our own University, and 

 the discoverer of Polyhius Henslowii on Irish shores. 



Along with the species recorded above were specimens in abundance 

 of a Pagurus apparently specifically distinct from, though much resem- 

 bling the immature specimens oiP.Bernhardus, but differing in being in 

 spawn much earlier in the year, and in its locality. This supposed spe- 

 cies occurs all over Dublin Bay, in 20-40 fathoms of water, but is most 

 common at Bray, where it is constantly brought ashore in the whelk- 

 pots. It almost always is found inhabiting the shells of either Natica 

 nitida or Turitella communis. 



I hope before the close of your session to submit to your Society a 



