THORACIC CIRRIPEDES COLLECTED IN 1925-1936 233 



Maxilla I with a straight front edge. Maxilla II with a concave front edge with bristles. 

 A posterior lobe with bristles is differentiated. Behind this a conical maxillary lobe is 

 formed. 



Number of segments of the cirri 



I II III IV V VI Caudal 



, . ^ , • , , - , , ■ , , ■ , , . , appendage 



Holotype 6 7 9 10 10 11 10 11 10 11 11 12 i 



Cirrus I shorter than the other cirri with rami unequal in length. In the longer cirri 

 there are two pairs of spines on the front edge of the segments. 



Caudal appendage single-jointed, conical without bristles. The appendage about half 

 the length of the proximal segment of the pedicel of the sixth cirrus. 



Complemenfal male of the sack-like type, without any traces of valves. The surface is 

 minutely spinous (Fig. 3 g). 



A young specimen (total length 1-5 mm.) here figured (Fig. 3 /) has all the valves of 

 the capitulum developed, but of different shape as in full-grown specimens. Thus, for 

 instance, the inframedian latus is quadrangular. In an older specimen (total length 

 3-5 mm.) it is also quadrangular but a little elongated (Fig. 3 k). 



Scalpellum bouveti n.sp. 



St. 456. 18. X. 30. I mile E of Bouvet Island. 40-45 m. Gear DLH. One specimen. 



Holotype. Zoological department of the British Museum. 



Diagnosis. Female. Capitulum with fourteen valves separated by distinct chitinous 

 interspaces. Growth lines weakly marked. Capitulum covered by a thin cuticle. 

 Scutum quadrangular, occludent margin slightly convex. Tergum triangular, occludent 

 margin convex. Carina regularly bent, umbo apical, dorsal roof convex. Upper latus 

 pentagonal, umbo apical, scutal margin concave. Rostrum triangular, elongated, umbo 

 apical. Rostral latus quadrangular, a little wider than high. Inframedian latus tri- 

 angular, umbo apical, the margins of the same length. Carinal latus pentagonal with 

 the umbo at the middle of the carinal margin. Peduncle with transversely elongated 

 scales, cuticle hairy. Mandible with three teeth and a pectinated inner angle. Maxilla II 

 with a concave front edge with bristles and a posterior lobe with bristles. A distinct 

 maxillary lobe is formed. Caudal appendage single-jointed without bristles, of about 

 the same length as the proximal segment of the protopodite. 



Complemental male sack-like, without cirri and valves. 



Discussion and description. One Scalpellum specimen I cannot refer to any 

 previously described species from corresponding parts of the oceans. I think it con- 

 venient to erect a new species hoping it will be possible later on to refound it from 

 richer material. It shows some resemblance to younger specimens of 5. convexum, 

 represented in this collection, but is different especially in the inframedian latus and 

 carina. 



