24° 



DISCOVERY REPORTS 



The second stage (Fig. 7,^) shows the plates a Httle more developed. The carinal latus 

 has not reached the mature shape, for the umbo does not project so much. The infra- 

 median latus is still triangular, with no trace of the secondary part ; consequently the 

 umbo is situated at the apex. The dorsal roof, in these young stages, is convex without 



Fig. 7. Scalpellum angulare. a. Palpus, b. Mandible, c. Maxilla I. d. Maxilla II. e. Cirrus VI 

 and caudal appendage. f,g. Young specimens (total lengths 0-84 and i-68 mm. respectively). //. Holotype, 

 lateral view (total length 7-5 mm.), i. Carinal view. j. Rostrum and rostral latera. k. Inframedian 

 latus from the side. /. Left scutum, internal view showing the depressions for the depressor muscle 

 (below) and for the complemental male. 



traces of the indistinctly developed lateral ridges of the fully grown stage. The tentacle- 

 like organs of the capitulum seen in the first stage have already disappeared. On the 

 peduncle many scales have been formed. 



Female. Capitulum covered by a hairy membrane. The hairs are very strong, some- 

 times regularly curved, a feature I have never seen in other species. Valves fourteen in 

 number, rather thick, separated by very narrow chitinous interspaces. The growth-lines 

 in this species are well marked and placed rather far from each other. 



