the Cirrijtede Siib(/enns Scilliclcpiis. 2')0 



drew attention to the fact that Mr. Gavoy had found a n<i\v 

 »\)ec\es o( I^ollicipes \t\ the Lias, and this at tliat time was 

 the earliest-known occurrence of tlie subclass Cirripedia. 



The Cirripede valves from Mickleton Tunnel, now in the 

 Gavey Collection in the Gei>h)<^icil Defiartnient of the British 

 Museum, number nine in all, and, ahhougli four kinds of 

 valve are represented — naimly, carina, sub.arina, scutum, 

 and tergum, — it would appear from their ornament that all 

 belong to a single species. They are undoubtedly the valves 

 of a pedunculate Cirripede belonging to the family Scalpel- 

 lida?, but the generic reference is not so certain. The species 

 is provisional!}' referred to the subgenus bcilkdi'pas of the 

 genus Calantica fur reasons given below (see [>. 261 et s q.). 



Calantica (Scillcelepas) gavey ij sp. n. 



1857. Pollicipes sp., Brodie, P. B., Brit. Assoc. Rep. (1856) pt. ii. p. 64. 

 1857. Pollicipes sp., Brodie, P. B., Auu. & Mag. Nat. Hist. sev. 2, 

 vol. xix. p. 103. 



Diagnosis. — Capitular valves with regular, widely-spaced, 

 raised ridges or zones of growth, between which are tine 

 transverse and longitudinal lines, and, esi)eeially in the lower 

 two-thirds of the valves, with irregular closely-set punctse — 

 a feature not noticed in any other fos.sil Cirripede. Carina 

 tapering rapidly towards the apex. Scutum probably trian- 

 gular, with almost straight widely-spaced ridges. Tergum 

 comparatively long and narrow, with the angles of the zones 

 of growth situated less than one-third the distance from the 

 carinal margin. 



])istribulion. — Plieusbachian [presumably davcei-VjCtuo] : 

 Mickleton Tunnel, near Chipping Campden, Gloucestershire. 



Boloti/pe.— The carina (In. 1«981) figured on PI. XIII. 



fig. 2. 



CoZ/^c^/on.— Collected by the late G. E. Gavey, C.E., 

 F.G.S., and now in the Geological Department of the British 

 Museum, registered In. 18980-In.- 18988. 



Material. — At least three individuals are represented by 

 the material, which comprises two almost complete carinio and 

 a fragment of another, one subcarina, five incomplete terga (of 

 which three are right valves and two are left valves), and an 

 iini)ression of part of a scutum. The valves are preserved ad 

 an intensely biittle jet-like substance. 



Measurements. — Except for the valve considered to be a 

 subcarina, all the valves are somewhat incomplete, and, in 

 the circumstances, to give only their actual measurements 



18* 



