BIMERIA. 297 



morphology of the hych'oid gonosome. Its pcpuharitics Iiave been referred to in the former 

 part of the present monograph. Sec p. 44. 



BIMERIA, StretUll Wright. 



Name. — From Inch Bimer, one of the rocky islets in the Firth of Forth. 

 Manicella, Allman. 



TROPHOSOME.— Htdeophtton invested with a conspicuous peeisabc, and 

 consisting of a branclied nTDUocAULUs rooted by a filiform nTDRORniZA. Htdkantiis 

 fusiform, witli a conical hypostome and a single circlet of filiform tentacles ; perisarc 

 continued over the body and hypostome of the hydranth to within a short distance of 

 the mouth, and forming a sheath on the proximal portion of each tentacle. 



GONOSOME.— Sporosacs developed from the hydrophyton. 



In the Annals of Natnral History for July, 18.59, I described as a new genus, under the 

 name of Manicella} a hydroid with the characters enumerated in the above generic diagnosis. 



In the same month's number of the ' Edinburgh New Philosophical .Journal,' Dr. Strethill 

 Wright instituted under the name of Bimeria a new genus for a hydroid, which, notwith- 

 standing some important points of discrepancy between Dr. Wright's description and my own 

 (especially Dr. Wright's denial of the existence of a hypostome in his hydroid), is almost certainly 

 the same species for which I had founded the genus Manicella. There is thus no actual priority of 

 publication on either side ; but Dr. Wright's paper is given as a report of a communication made 

 some months previously to the Royal Physical Society of Edinburgh, and is the same as that in 

 which, as already said (see above, p. 295), he characterises his genus Garvcia. I therefore 

 willingly concede to an esteemed coUaborateur the right of naming the new genus, and accept 

 Bimeria as its legitimate designation. 



Bimeria vestita, Wright. 

 Plate XII, figs. 1—3. 



Bimeria vestita, — WriijM, in Edinburgh New Phil. Journ. for July, 1859, pi. viii, 



fig. 4. Bincks, Brit. Hydr. Zooph., p. 103, pi. xv, fig. 2. 

 Manicella fusca, — Allman, iu Ann. Nat. Hist, for July, 18.59. 



TROPHOSOME. — Hydrocaulus attaining a height of about half an inch, much 

 branched, and having its ultimate ramuli disposed with a regularly pinnate arrange- 



' A diminutive noun, from manica, the long Roman sleeve which performed tlie office of a glove ; 

 tlie allusion is to the extension of the perisarc over the body and tentacles of the hydranths. 



