64 I PROF. F. J. BELL ON THE GENUS PSOLUS. [NoV. 14 



and which will, I trust, be found to contain an exact account of all 

 the facts necessary for forming a judgment on the name to be 

 applied to this generic division, I pass to an enumeration, first, of the 

 forms supposed to be specifically distinct, and, secondly, of the specific 

 names given to forms already described. 



I. List of the Species regarded as distinct. 



1. antarcticus, Philippi, Arch. Nat. 1857, p. 133. [B.M.] 



2. appendiculatus, de Blainv. Diet. Sc. Is&i. xxi. p. 317. 



3. boliolensis. Semper, Holoth. p. 62. 



4. cataphractus, Sel. Zeitsch. wiss. Zool. xviii. p. 110. 



5. coniplanatus. Semper, Holoth. p. 61. 



6. ephippi/eryWyv. Thomson, Journ. Linn. Soc. xiii. p. Gl. 



7. fabricii, Diiben & Koren, Higr. Kgl. Svensk. Akad. xxxii. 

 p. 31 6 (note). [B.M.] 



8. operculatus, Pourtales, Bull. M. C. Z. i. p. 127. 



9. phantapus, Strussenfeldt, Abh. schwed. Ak. xxvii. p. 268. 



[B.M.] 



10. poriferus, Studer, M.B. Ak. Berl. 1876, p. 452. 



11. regalis, Verrill. Proc. Bost. Soc. N. H. x. p. 357. [B.M.] 



12. squamatus, Koren, Nyt Mag. iv. p. 211. [B.M.] 



Synonymous terms. 



1. granulatus, Ayres (Best. Soc. N. H. iv. p. 63) = regalis^, VI. 



2. Icevigatus, Ayres (Bost. Soc. N. H. iv. 2^)= phantapus^. 



3. sitchaensis, Brdt. (Prod. p. A7)=fabricii'. 



[A. Psolus forbesi (Ann. N. H. (1) xv. p. 174) has no more 

 existence than such as is based on the sentence of Couch (Cornish 

 Fauna, pt. ii. p. 73), " one closely allied to the genus Psolus of Mr. 

 Forbes."] 



PSOLTJS FJBRICII. 



The most important fact with regard to this species that a survey 

 of the British-Museum collection brings to light is an extension of 

 its geographical distribution, which can hardly be said to be un- 

 expected. Among the collections made by Captain H. C. St. John, 

 R.N., in the Japanese seas (presented to the Trustees by Dr. J. Gwyn 

 Jeffreys) are some small specimens which cannot, I think, be referred 

 to any other than this species ; for though they present an imbrication 

 of the scales which is remarkable when compared with the extent of 

 that imbrication in two large specimens from the coast of Greenland, 

 it is not so remarkable when we take into consideration the example, 

 intermediate in size between these two sets, which was collected off 

 Greenland by H.M.S. ' Valorous ' (and figured by Messrs. Duncan 

 and Sladen in their ' Arctic Echinodermata,' pi. i.). Further, it is to 



^ The Psolus gramdatus of Grube (Aetin. &c. d. Adriat. u. Mittelmeers, 1840, 

 p. 38) does not belong to this genus, but to He7mcrej>is, J. Miiller. 



^ See Stimpson, Inv. Gd. Man. p. 16 (1853, and not 1854 as given by Sel., 

 and Verrill, Proc. Bost. Soc. N. H. xii. p. 353). 



' See H. Ludwig, Zeitsch. f. wiss. Zool. xxxv. p. 588. 



