248 
80. Scalpellum cornutum, G. 0. Sars, n. sp. 
(PI. XX, Fig. 8— 10). 
Scalpellum cornutum, Or. 0. Sars, Crustacea et Pyenogonida nova Exped. 
Norv. No. 45. 
Artscharacteristik. Capitulnm aflangt ovalt. ikke ud- 
videt mod Enden, med Apex forholdsvis kort og beliggende 
nedenfor Skallens Axe. Valvlerne ttet sammonstodende, 
med skarpt udprmget Sculptor af radiereflde ophjaiede Li- 
nier. Kjplen jevnt buet, uden Umbo. Tergalstvkkerne 
store, med Aabningsrandeu noget kortere end Basalranden. 
Skjoldene forholdsvis brede, mod det apicale Hjorne sterlet 
uddraget og tilspidset, rostrimdignende. De dorsale Basal- 
stykker fremspringende til hyer Side af Kjolens basale Parti 
i Form at 2 hornformige tilbagekrummede Fortsatser; de 
midtre Basalstykker bredest ved Basis med en sterkt op- 
hoiet central Umbo; de yentrale Basalstykker meget mindre 
end de pvrige. Rostrum sserdeles lidet, mesten rudeformigt. 
Stilken kort, indknebet ved Basis og tydeligt boiot sa.mt 
bekkedt med store taglagte Kalkskjml. Den ydre Beklmd- 
ningsmombran glat. Farven livid. Liengden indtil IP"* 1 . 
Findesteder. Stat. 124, 267, 359. 
Bemaerkni'nger. Denne Art kjendes let fra de fore- 
gaaende ved den eiendommelige Form af de dorsale Basal- 
stykker og af Rostrum samt ved don sse'rdoles skarpt ud- 
prsegede Sculptur af Valvlerne. Fra Sc. Stromii, som den 
ligncr ved Stilkens Boining, er den desuden let kjendelig 
ved Capitulums forskjellige Form. 
Beskrivelse. Legemet er (se PL XX, Fig. 8—10) 
forholdsvis meget kort og underssetsigt samt indtager en 
lignende Stilling i Forhold til de Gjenstande, hvortil det 
er frnstet, som hos Sc. Stremii, pan. Grand af Stilkens 
Boining. 
Capitulum er seet fra Siden (Fig. 8) af temmelig 
regelmsessig oval Form, med Breden noget storre end den 
halve Lsengde og ikke bredere i det ydre Parti end ved 
Basis. Den ventrale Rand eller Aabningsranden er mesten 
lige, og Apex forholdsvis kort, men skarpt tilspidset samt 
beliggende kjendeligt nedenfor Skallens Axe. Valvlerne er 
tset sammenstodende, kun begramdsede af smale Suturer, 
uden mellemliggende hudagtige Partier, og viser alle en 
ssei'doles skarpt udprseget Sculptur af ophoiede radierende 
Striker eller smale Ribker, 
Kjolen mangier, som hos de 2 foregaaende Arter, nogen 
tydelig Umbo, men er i sit ydre Parti noget hoiere og 
sterkere buet. 
Tergalstvkkerne viser den ssedvanlige skjfevt triangu- 
Iffire Form og bar Aabningsranden noget kortere end Ba- 
salranden. 
80. Scalpellum cornutum, G. 0. Sars, n. sp. 
(PL XX, figs. 8 — 10). 
Scalpellum cornutum , Q-. 0. Sars, Crustacea et Pyenogonida nova Exped. 
Norv., No. 45. 
Specific Character. — Capitulum oblong-oval, not 
expanded towards extremity, with apex comparatively short 
and placed below axis of shell. Valves in close contact, 
with a sharply prominent sculpture of radiating elevated 
striae. Reel evenly arched, without umbo. Tergal seg- 
ments large, with occluding margin somewhat shorter than 
basal. Shields comparatively broad, having apical corner 
rostrum-like, as also greatly produced and pointed. Dorsal 
basal segments projecting on either side of basal part of 
keel, as 2 corniform, backward-curving probations; median 
basal segments broadest at base, with an exceedingly prom- 
inent central umbo ; ventral basal segments much smaller 
than rest. Rostrum remarkably small, well-nigh quadrate 
in form. Peduncle short, constricted at base, and dis- 
tinctly indexed, as also covered with large imbricate cal- 
careous scales. Outer investing membrane smooth. Colour 
white. Length reaching ll mm . 
Locality. — Stats. 124, 267, 359. 
Remarks. — This species may be readily recognized 
from the preceding by the peculiar form of the dorsal 
basal segments and of the rostrum, as also by the exceed- 
ingly prominent sculpturing of the valves. From Sc. Stromii, 
which it approximates in the flexure of the peduncle, it is 
also easily distinguished by the deviating form of the 
capitulum. 
Description. — The body (see PI. XX, figs. 8—10) 
is comparatively very short and thickset, with a position, — 
by reason of the flexure of the peduncle, — in relation to 
the objects whereto it is attached, similar to that of the 
body in Sc, Stromii. 
The capitulum, viewed from the side (fig. 8). has an 
approximately oval form, with the breadth slightly exceed- 
ing half the length, and not broader in the outer part than 
at the base. The ventral, or occluding, margin is almost 
straight, and the apex comparatively short, but acutely 
pointed, and placed appreciably below the axis of the shell. 
The valves are closely contiguous, defined merely by narrow 
sutures, without intervening cutaneous strips, and all of 
them exhibiting a most strongly marked sculpture of prom- 
inent radiating strife or slender ribs. 
The keel, as in the 2 preceding species, has no dis- 
tinct umbo, but occurs in its outer part somewhat more 
elevated and arched. 
The tergal segments exhibit the usual oblique, tri- 
angular form, and have the occluding margin somewhat 
shorter than the basal. 
