﻿49 



87 



the broad end towards the middle line; the posterior as in Amphisile is the small- 

 est; the pharyngobranchial I is present as in Amphisile but does not seem to be 

 ossified here; the lower pharyngobranchial V has an oval tooth plate on the upper 

 surface. For the rest, all the essential features are quite the same as in Amphi- 

 sile; epibranchial I broad (with stronger process than in A.), epibranchials II and 

 III short and heavy, epibranchial IV narrower and more slender, epibranchials 

 III and IV connected by processes etc. Gill -rakers are present here on all 

 the arches, 2 rows on each with exception naturally of V, which has only the 

 outer row, as in Amphisile, above the tooth plate. The gill-rakers are pointed, 

 triangular with ossified axis; the outer (front) row is the largest, especially on 

 arch I where the rakers of the inner row are very small ; on arch IV and on the 

 ceratobranchial of III the difference in the size of the rakers in the two rows is 

 not great. In each branchial lamella there is an ossified inner axis^^. 



In tabular form the main features in the branchial apparatus would thus 

 be the same as in Amphisile (apart from the condition of the gill-rakers). 



The pectoral girdle has been very accurately described by Starks (30 

 p. 631— 32) in Centriscus {Macrorhamphosus) sagifiie Jordan & Starks, a species from 

 Japan closely allied to (if not identical with?) C. scolopax L. To Starks' descrip- 

 tion I have only to add a few remarks. 



Of the three bones composing the clavicular arch the uppermost, the post- 

 temporal, forms part of the skull, being suturally united with the epiotic, jiterotic 

 and exoccipital; near the suture separating it from the latter, on the posterior face 

 of the skull, it carries a fossa, in which the next member, the supraclavicle, is 

 firmly fixed by dense connective tissue. The supraclavicle has one face forwards, 

 looking into the gill chamber, another narrower looking sidewards; the latter 

 carries the sculptured ridge, mentioned above, the thickened upper edge of which 

 forms a continuation of the ridge on the posttemporal and pterotic. The upper 

 part of the clavicula forms a broad plate bordered below by an arched sculptured 

 ridge (PI. II, fig. 2 cZ) seen through the skin; compared with Amphisile the first part 

 corresponds to the lighter shaded part, the latter to cl of PI. II, fig. 1. While in 

 Amphisile the first part is on the outer face wholly concealed by the dorsal armour 

 and with its upper margin only touches the tip of the transverse process on the 



1). K I). Vidensk Selsk, Skr.. 7. Rickke. n.iturvidemk. of! nlalheill. AW. VI. 2. 12 



