44 



NOTES ON SOME TYPES OF MARGINELLA IN THE 

 MARRAT COLLECTION. 



By J. R. 1.E B. TOMLIN, M.A. 



(Read before the Society, March 12th, 1913), 



By the courtesy of Mr. J. A. Clubb, the Curator, I have recently 

 received from the Liverpool Free Public Museum certain species of 

 Marginella for examination. I have taken the opportunity of figuring 

 several practically unknown species which were briefly described in 

 the first volume of this Journal. The following notes are the result 

 of my examination. 



Marginella pellicula Weinkauff. — This Cape species has gener- 

 ally been credited to Marrat and specimens in his collection are so 

 labelled, but without locality. I cannot, however, ascertain that 

 Marrat ever described it, and AVeinkauff,' the first monographer to 

 include it and figure it says : "J/, pellicula Marrat, teste Sowerby in 

 litt.," so it is most probably only a MS. name. Fortunately the point 

 is of small importance as Weinkauff^ is certainly right in his subse- 

 quent surmise that it is a synonym of Incida^ Marrat. The description 

 of the latter is unmistakable, and the shells distributed as pellicula 

 are merely worn, bleached lucida. The Curator has failed to find 

 the types of lucida in the Marrat Collection. 



M. OVUloidea Marrat. — Purely a MS. name. The two examples 

 are immature and much worn M. maculosa Kien. 



M. warrenii^ Marrat. — This splendid species is described as 

 having been collected by a Capt. Warren in lat. 50° 23' 5" N., long. 

 64° o' 4" W., a locality somewhat inland from the northern coast of 

 the Gulf of St. Lawrence ! One of the specimens measures 23 mm. 

 I have selected for figuring the only one which exactly coincides with 

 Marrat's measurements, and which is presumably the type (pi. i., f. 9). 

 The aperture measures 15 mm. in length. The two bands have 

 apparently faded as they are now of a very pale, dirty yellow. It is 

 impossible to conjecture the real origin of this species; it is so 

 different from any other known species. I am inclined to think that 

 it has affinities with the W. Indian ave/ia group. 



M. praecallosa" Higgins.— The unique specimen of this species 

 (pi. i., f. 10) from an unknown locality has an unusually thick outer 



1 Kii.ster, Conch. Cab. Marg., p. 123 (1879). 



2 Ibid., p. 137. 



3 /. o/C, i., p. 205 (1877). 



4 /. o/C, i., p. 137. 



5 /. o/C, i., p. 136. 



