PERISPHTNCTES FLAGELLANS. 51 



This specimen is in the Museum of Practical Geology, No. 8654, and was 

 obtained at Stalbridge "Weston in a matrix exactly resembling the upper part of 

 the limestone at Holwell, whence I obtained a fragment of apparently the same 

 species. There is another example also in the Sherborne Museum from the same 

 locality. These all come from the same district in which, like that near 

 Weymouth, a series of massive earthy limestones overlie the usual rubble beds. 

 These rocks thus represent a special encroachment upon the Oxf ordian or Callovian 

 strata, but they contain, nevertheless, a species which, as Quenstedt said of his, is 

 a " constant companion of A. macrocephalus." 



It is believed that a comparison of the descriptions here given will show that 

 we are dealing with the same species as that named subbalcerise by D'Orbigny and 

 funatus by Oppel, which come from the same horizon. These identifications can 

 only be determined by actual examination ; any other process would only lead to 

 further confusion ; but A. moorei, Oppel, is confessedly only a synonym for 

 A. subbakeriaB, D'Orb., or is otherwise undescribed. 



The following Table II shows for comparison the numerical characters of No. 1, 

 the specimen here figured ; No. 2, a Sherborne specimen ; No. 3, Quenstedt's 

 species in 'Amm. Schwabischen Jura,' the type of funatus; and No. 4, D'Orbigny's 

 type, as given in 'Terrains Jurassiques,' pi. cxlviii. A — F as before in Table I. 









Table II. 









No. 



A 



B 



C 



D 



E 



F 



1 . 



. 100 . 



. -86 



. . -30 . . 



■23 . 



. 50 . 



. 3 



2 



. 143 . 



. -88 



. . -33 . . 



•27 . 



. — . 



. — 



3 . 



. 84 . 



. -88 , 



. -31 . . 



■35 . 



. 48 . 



. 2-2 



4 . 



. 96 . 



. -86 . 



. -32 . . 



•27 . 



. 57 . 



. 3-6 



The breadth of the last whorl in No. 2 is probably caused by the specimen being all body chamber. 



Distribution. — From Stalbridge Weston (1), Holwell (2), and Garsdon ? (1). 

 It is also recorded by H. B. Woodward under the name of baherise from the 

 Weymouth district and from Sudbrook. 



Species [mpeefectly defined. 



Perisphinctes flagellans, sp. nov. Plate V, fig. 3. 



1883. Ammonites cf. arbustigerus ? , Quenstedt, Amm. Schwabischen Jura, pi. lxxx, fig. 7. 



Sciatype. — Only a quadrant of a whorl seen — but this contains sufficient data 

 to enable us to judge of its original form as restored in outline on PI. V, fig. 3. 

 The outer radius of curvature is about 60 mm., and the radial breadth of the 



