ON A NEW SPECIES OE PHTMOSOMA. 165 



On a New Species of Phymosoma, with a Sy- 

 nopsis of the Genus and some Account of 

 its Geographical Distribution. 



By 



Artbur E. Sbipley, M.A., F.U.S., 



Fellow and Lecturer of Christ's College, Cambridge, and Demonstrator of 

 Comparative Anatomy in the University. 



With Plate XII. 



During a visit to the Bahama Islands in 1887, Professor 

 Weldon made an excursion to the neighbouring island of 

 Bimini. Whilst investigating the fauna of the lagoon in that 

 island he came across a few specimens of what appeared to him 

 to be a new species of Phymosoma. One or two of these he 

 dissected on the spot; the remaining three he brought to 

 England^ and was good enough to give them to me for descrip- 

 tion at the time when he handed over to me his specimens of 

 Phymosoma varians which form the subject of a previous 

 memoir. 



I have divided this paper into the following sections : 

 (i) A general description of the new species. 



(ii) A detailed description of those organs which differ 

 markedly from the similar organs in Ph. varians. 



(iii) A synopsis of the genus. 



(iv) A short account of the geographical distribution of the 

 genus. 



VOL. V, PART II. 16 



