1865.] OF PHYSALUS ANTIQUORUM,. 217 
inches. 
Nasals, breadth of the two at posterior end ............ sinty iA 
Nasals, breadth of the two at the anterior end ............ 7/ 
Length of beak, from curved border of maxillary to ike seit LLG 
Length of maxillary ........ sekararagd a pir ar tvapy VOL, 
Projection of premaxillary beyond maxillary . taiate tS aaa wisn, 3 uj OS 
Breadth of maxillaries across orbital processes, following curve 81 
of beak at base, following the curve............ Be Arts 
— of beak, one-quarter of its length from base........ 42 
— of maxillary at the same point.............--.... 14 
— of premaxillary at the same point .......-...... 63 
—— of beak at middle, following the curve............ 33 
—— — of maxillary at middle ................-45- rege 
—— of premaxillary at middle.....................- 5z 
—— of beak at three-fourths of its length from base.... 23 
—— of maxillary at same point .............. 00 ee ee oe 
— of premaxilaryab.same point. «.0:5)<: Jamdel awoke upd 
Length of lower jaw in a straight line ...............4-. 156 
EAP ar iit, AL ICHTON GIA AT OCR. ti55 oj oie) 6.014 0.0. 9f0) ie «sisal 19 
RAG 0 Es a Se eee rire ree aricsty ee 
The total number of the vertebra present is 58 ; but evidently a 
few of the terminating caudal are wanting. The vertebre are as fol- 
lows :—7 cervical, 15 dorsal, 15 lumbar, and 21 caudal. The cervical, 
as usual in this Whale, are all free. The atlas is similar to that of an 
animal of the same species from Devonshire, figured by Dr. Gray in 
his recent paper on the “ British Cetacea”’ (Proc. Zool. Soc. 1864, 
p- 217, fig. 9), and answers well to his description, except that the 
transverse processes are somewhat more horizontal, bulbous, and 
truncated at their outer ends. It may further be remarked that Dr. 
Gray’s figure of the atlas of Physalus duguidii (loc. cit. p. 220, f. 13) 
agrees rather with the Rosherville specimen. 
The axis does not quite agree with either of the figures given by 
Dr. Gray of species of this genus (Joc. cit. figs. 10 & 14); but, of 
the two, the resemblance is greater to the Devonshire specimen of P. 
antiquorum ; the perforations of the lateral processes, however, are 
rather larger and more oval. The rudiment of an odontoid process 
exists in a raised, flattened, circular prominence. The expansions of 
the transverse processes point backwards, and reach so far as to en- 
close those of the three succeeding vertebre ; they are thin towards 
their free outward extremities. The neural arch is broad, and its 
laminz prolonged ; so that it projects in a shelving manner over the 
next vertebra. The spine is bifid, and the prominences on either 
side are strong and massive, while the median groove is marked by 
a slightly raised ridge. 
The third vertebra is thinner in every way; in this respect it 
agrees with the fourth and fifth. The body is tolerably square, less 
deep than broad ; the anterior articulating surface single and convex, 
the posterior broadly concave; the transverse process ring-shaped, 
compressed antero-posteriorly, and with a backward-arched curve, 
