486 Dr. G. J. Hinde — Discovery of Marsiqntes, etc. 



found ; they range from 4 to 10 mm. in width. The horseshoe-shaped 

 brachial plates or joints are, as one may suppose, more abundant 

 than the test-plates ; in some cases several occur in a series as if 

 belonging to the same arm ; they range from 2 to 6 mm. in width. 

 Some of these small brachial joints closely resemble those of 

 U. socialis, Grinnell, from the Chalk of Kansas, as figured by 

 Dr. Bather,^ and others correspond as closely with those of U. West- 

 faliciis, Schl., from Eecklinghausen, in Westphalia, as shown in 

 Schluter's figures.- Whether the forms in our English Chalk 

 belong to either of the above or to a distinct species is, at present, 

 an open question. 



Polyzoa. — In addition to the species named in the list, which have 

 been determined by Mr. W, D. Lang, there are several species of 

 Cheilostomata not yet worked out. 



Brachiopoda. — This group is very poorly represented in the 

 Beddington section ; I have only seen single examples of each of 

 the four species in the list. 



LamellibrancMata. — These are more numerous than the Brachiopods. 

 Inoceramus is common in places, and large but imperfect examples 

 occur; small forms of Ostrea are distributed generally. Spondylus 

 spinostis is not infrequent, and large, well-preserved specimens are 

 met with. 



Ammonites leptophyllus is represented by an impression, on a block 

 of chalk, of a portion of the septal sutures of an individual which, 

 in Mr. Crick's opinion, may have been from 2 to 3 feet in diameter, 

 corresponding with those present in the Marsiipites zone near 

 Margate. It was found at the southern end of the road section 

 near the Keeper's House. 



Actinocamax verus. — I only obtained a fragmentary specimen, 

 which was determined by Mr. Crick. It came from near the New 

 Barn Farm, about midway in the road section, where Uintacrinus 

 plates are abundant. Two specimens of A. granidatus were found 

 by Mr. W. M. Holmes at the higher south end of the trench. 



Pisces. — In addition to the teeth named in the list, the Chalk 

 throughout this road section contains great numbers of the scales 

 and bones of small fishes, and one can hardly break up a block 

 without meeting with them, either scattered singly or in small 

 groups of irregularly commingled and compressed bones and scales, 

 without showing any definite outlines of the fish to which they 

 belonged. The fishes were evidently small, and, judging from the 

 number of their remains, they must have swarmed in the sea of 

 the period. 



The fossils present in this Plough Lane road cutting prove 

 unmistakably that the Chalk in this part of Beddington belongs to 

 the zone of Marsupites and that the Uintacrinus band is also well 

 represented. It may also reasonably be inferred that this zone will 

 be found on the same line of strike in South Croydon, where indeed 



1 Proc. Zool. Soc, 1895, pi. liv, figs. 2-13. 



- Zeitschr. deutsch. geol. Ges., xxx (1878), pi. iv. 



