Dr. Henry Woodward — On a new Loricula. 495 



part of the animal's body was lodged in the peduncle, as in the recent 

 genera Lithotrya and Ihla " (op. cit., p. 82). 



We are, fortunately, able to record the complete series of the valves 

 of the capitulum in Loricula as seen upon the exposed upper right side 

 of the specimen recently acquired for the British Museum, with the 

 exception of the rostrum, which may or may not have been present, 

 but in any case it has not been preserved in any of the examples so 

 far discovered. 



Carina. — The carina is 5 mm. in height by 2 mm. in greatest 

 breadth at its base, and tapers to a point at its summit ; it is marked 

 by fine transverse lines of growth. The ' carinal latus ' (also called 

 the 'second latus') is obliquely triangular; it is 5mm. in height 

 upon the carinal border, which is nearly straight, the apex only being 

 slightly curved towards the tergum ; the tergal border is slightly 

 concave and is 10 mm. in length, the lower point being covered by the 

 base of the middle or scutal latus (also called the ' first latus ') ; 

 the base, which is somewhat curved, is 7 mm. broad. 



The middle or first latus is 6 mm. in height on the tergal border 

 and 8 mm. on the scutal margin (its apex is slightly abraded) ; its base 

 4 mm. broad. Resting between these is the tergum, which measures 

 7 mm. along its carinal-lateral border, 5 mm. upon its upper free 

 occludent border, and 7 mm. on its latero-scutal border ; both the upper 

 points of the middle latus and scutum slightly overlap the tergum. 



The scutum is the largest paired plate in the capitulum, being 

 8 J mm. in height along its lateral margin and 11mm. along its 

 occludent margin, the ascending wing being much prolonged upwards 

 beyond the umbo, and very attenuated and narrow like the valve of 

 a mollusc, such as Necsra, the base being 5mm. broad; the lines of 

 growth in the lower part of the valve are parallel to the tergo-lateral 

 and basal margins ; the umbo of the valve, which is largely developed 

 and very prominent, is 5 mm. below the apex, in fact about midway 

 on its occludent margin. Mr. Darwin writes (op. cit., p. 82): "In 

 this important respect [the scutum of] Loricula resembles that of 

 Scalpellum magnum, S. tuhercidatum, and S. cretce." 



In evidence of the presence of both upper and under side of the 

 paired plates to the capitulum in Loricula, the new specimen (Fig. 1) 

 shows clearly, and Dr. Fritsch's specimen (Fig. 2) also, the inner 

 margin of the second valve of the scutum {set') exposed beneath the 

 occludent margin of the upper valve. It is along the occludent 

 borders of the paired tergal and scutal plates that the cirri of the 

 Cirripede are extruded in search of food, or again withdrawn within 

 the capitulum when the animal is alarmed or at rest. 



Peduncle. — This has a most singular, elegant, loricated structure ; 

 it is wider than the capitulum and twice as long. It is entirely 

 covered, at least upon its exposed surface, by three nearly equal rows 

 of smooth, calcareous scales, much elongated transversely, the ends of 

 the scales in each row intersecting those in the adjacent rows^ and 



1 The beautiful imbricated arrangement of the rows of transversely elongated 

 calcareous plates, protecting the peduncle in Loricula, suggests at once comparison 

 with the test of that anomalous Cretaceous Echinoderm Echinothuria Jloris, 



