50 MR. G. W. LAMPLUGH ON THE JUNCTION OF [vol. Ixxviii, 



excursion in 1915 (see reference on p. 35) and has been recently 

 described in part b}'' Dr. Kitchin & Mr. Pringle {op. cit.), but is 

 otherwise unrecorded. The following notes, based on my own 

 collections (wliich 1 still retain), will serve as a rough indication 

 of the main elements of the fauna. The fossils, in nearly all cases, 

 take the form of sharp casts in the dark gritty phosphatic rock, 

 becoming obscure and Avorn on the pale exterior of the nodules. 

 Owing to the tendency of the nodules to break with a prismatic 

 fracture, it is generally a matter of chance, even when fossils are 

 present, whether they will be disclosed or destroyed under the 

 hammer, and the majority of the nodules appear to carry none. 



To distinguish the two principal localities, the letters Gr. = Grove- 

 bury pits, B. = Chamberlain Barn pit, are used after mention of 

 the specimens. 



Cephalopoda. — The ammonites recorded by Dr. Kitchin & Mr. Pringle 

 are (1) Desmoceras aff. heuclanti (Brong-niart) ; (2) Douvilleiceras m.mnmillatum, 

 (Schlotheim) ; (3) Leyineriella regularis (Bruguiere) ; (4) Leymeriella tarde- 

 furcata {d'Orhignj) ; said (o) Son7ieratia dutempleana (d'Ovhignj). Of these, 

 1 & 3 are comparatively numerous and 2 & 4 comparatively rare at G. and B., 

 mainly in small clusters of one kind. I have not myself obtained 5. I possess 

 a well-marked fragment of ' Ammonites of interruptus-type ' in gritty-nodular 

 matrix from G., probably from the more clayey upper part of the band. Some 

 of the ammonite-fragments preserve traces of the nacreous lustre. 



Of belemnites I possess the cast of a phragmocone from G., rather large for 

 ' B. minimus,' but apparently belonging either to this or to an allied form (see 

 remarks above on the limestone-specimens, p. 47). 



Gastropoda. — Casts of the shells of this Class are rather numerous, 

 particularly at G., and often show good ornamentation, so that determination 

 from mouldings should eventually be practicable. The following genera, 

 with others, are probably represented among my specimens : ' Aporrhais,' 

 ' Natica,' ' Pleurotomaria(?),' ' Scalaria,' 'Solarium,' ' Trochus.' 



Lamellibranchiata, — Also numerous as casts, but perhaps not often 

 specifically identifiable. I have noted the following : ' Inoceramus con- 

 centricus,' a rather small broadly-ribbed form, approaching ' salomoni,' like 

 that in the Shenley limestone (3 specimens, G.) ; ' Pecten orbicularis ' (several 

 specimens, G., B.) and other pectens ; ' Janira quinquecostata ' (2 specimens, 

 B.) ; ' Pteria pectinata ' (G., B.) ; ' Nucula probably pectinata ' (1 specimen, G.); 

 an ornate ' Trigonia' (2 specimens, B.); 'Goniomya' (1 specimen, B.); a small 

 striated ' Cardium ' (several, G., B.) ; ' Cyprimeria (?) ' (3 specimens, B.); 

 * Cucullaea (P) ' ; ' Panopaea (?) ' ; many remnants of a large shell, always 

 crushed, ' Inoceramus ' or ' Gervillia ' (G., B.). 



Brachiopoda. — The fossils of this Class area subordinate element in the 

 fauna of the nodules, and not predominant as in the limestone. They occur 

 as casts, occasionally clustered but often singly, and are much more plentiful 

 at B. than at G. The majority appear to belong to ' Terebratula,' of forms 

 near to ' moutoniana ' and ' biplicata var. dutempleana ' (B., G.) ; another form 

 may be ' Zeilleria convexiformis ' ; and there are probably two species of 

 ' Kingena ' (? ' newtoni,' B., and ' lima ' G.). Only one ' Ehynchonella " (G.) is 

 in my collection; also a ' Lingula ' (B.). 



Echinodermata. — I submitted the three casts obtained to Prof. H. L. 

 Hawkins, who found them too ill-preserved for identification, but considered, 

 though without confidence, that two might be small ' Pseudodiadema ' (B., G.), 

 and the third came nearer in proportion to ' Cardiaster latissimus ' (G.) than 

 to any other species (see p. 77). 



Criistacea. — The claws of a large lobster-like crustacean, rather well- 

 preserved, together with three or four less promising specimens are in my 

 collection from B. 



