18 



Til hver Side af Pandehornet viser Rygskjoldets for- 

 reste Kanter et kort afrundet Udsnit, hvorfra Øinene rager 

 frem. Dette Udsnit, der danner et Slags ufuldkommen 

 Øienhule, er udåd begrændset af en liden spids Tand, tien 

 i Ulte Extraorbitaltorn. 



Rygskjoldets Overflade er mellem Længdekjølerne ujevn, 

 dannende flere mere eller mindre tydelige Tværvulster. hvoraf 

 2 omtrent i Midten af Rygskjoldets Længde er mest frem- 

 trådende. Fra Roden af Panclehornet strækker sig 2 noget 

 buede og bagtil divergerende ophoiede Linier. der bégrændser 

 et mediant Felt fortil, svarende til Maveregionen hos Bra- 

 chyurer og Anomurer. Bagtil bemærkes 2 andre, men 

 mindre skarpt markerede Linier, der fra den bagerste dor- 

 sal.- Fortsats lober bueformigt udåd og fortil ovenfor Side- 

 kjolerne og antyder den ovre Begrændsning for Grjelleregio- 

 nerne. Endelig sees nedenfor Sidekjolerne i det bagre Parti 

 af Rygskjoldet (se Fig. 2) en noget fremspringende Længde- 

 kant. hvorfra Sidelloiene boier sig stærkt indad mod Midt- 

 hnien eller ind under Forkroj>pen. Den frie Rand af Side- 

 fløiene er her besat med tine Haar. Rygskjoldets bagre 

 Rand er oventil noget fortykket og meget svagt udrandet i 

 Midten. 



Det mellem Foddernes Insertion beliggende Bryst- 

 skjold (Fig. 22 og 23) er tydeligt udviklet og temmelig 

 bredt bagtil samt ved tydelige Tværsutnrer delt i paa hin- 

 anden følgende Segmenter. Det viser en triangulær Form 

 og har langs ad Midten en Kjøl, der for hvert Segment 

 gaar ud i en spids fortil rettet tornformig Fortsats. 



Bagkroppen (se Fig. 1 og 2). der omtrent er dobbelt 

 saa lang som Forkroppen, er i sin forreste Del neppe sma- 

 lere end denne, men aftager hurtigt i Brede bagtil. Den 

 er forøvrigt hos ægbærende Hunner adskilligt bredere end 

 hos Hannerne og ogsaa forsynet med dybere Epimerer. 

 Rygfladen er stærkt hvælyet og ligesom Rygskjoldet meget 

 ujevn, med en mere eller mindre tydeligt udpræget Sculptur 

 i Form af uregelmæssige Forhoininger og Fordybninger. 

 Langs ad Midten lober en skarpt markeret Kjøl, der paa 

 de so forreste Segmenter hæver sig til en .hoi. sammeritrykt 

 Fortsats, omtrent af samme Beskaffenhed som Rygskjoldets 

 Torner. Paa de 3 følgende Segmenter er derimod Ryg- 

 kjolen ganske jevn, og paa sidste Segment tindes oventil 2 

 parallele Kjoler, der bégrændser et canalformigt fordybet 

 Parti i Midten; enhver af de sidstnævnte Kjoler danner i 

 den bagerste Del to paa hinanden følgende bagndrettede 

 tandformige Fremspring. 



De to forrests Segmenter er oventil betydelig kortere 

 end de øvrige og skilte ved større, hudagtige Mellemrum, 

 hvorfor ogsaa Bevægeligheden mellem disse Segmenter er 

 temmelig stor. 



Epimererne er navnlig hos de ægbærende Hunner 

 Ise Fig. 2) temmelig store, pladeformige og i Kanterne tint 

 cilierede. Paa Iste Segment er de dybest og danner i 

 Midten af den forreste Kant et lidet tandformigt Frem- 

 spring, der moder Sidekjølerhe paa Rygskjoldet. medens de 



On either side of the rostrum, the anterior margins 

 of the carapax exhibit a short, rounded immargination, trom 

 which the eyes pi - oject. This immargination, wbicb con- 

 stitutes, as it were, a kind of imperfect orbita. is limited 

 exteriorly by a small acute tooth, — the so-called extra- 

 orbital spine. 



The surface of the carapax is somewhat uneven be- 

 tween the longitudinal carinæ, constituting several more or 

 less distinct transverse protuberances, 2 of which. located 

 about in the middle of the longitudinal diameter of the carapax. 

 are most prominent. From the base of the rostrum. extend 

 2 somewhat arcuate and posteriorly diverging, elevated lines, 

 which anteriorly mark off a median area. corresponding to the 

 gastric region in the Brachyura and Anomura. Posteriorly are 

 observed 2 other. but less sharply marked lines, which. from the 

 posterior dorsal projection, extend in a curve, outward and 

 forward, above the lateral carinæ, and indicate the lipper limit 

 of the branchial regions. Finally. is seen beneath the lateral 

 carinæ, on the posterior portion of the carapax (fig. 2). a 

 somewhat projecting longitudinal border, from which the 

 lateral lobes bend considerably inward towards the median 

 line. or in under the ventral tace of the body. The free 

 margin of the lateral lobes is here finely ciliated. The 

 posterior margin of the carapax, above. is somewhat incras- 

 sated and very slightly immarginated in the middle. 



The sternum, located between the origin of the legs 

 (ligs. 22, 23) is distinctly developed and posteriorly rather 

 broad, as also, by distinct transverse sutures, divided into 

 a series of segments. It has a triangular form and exhibits 

 along the middle a carina. which, at each segment, is produ- 

 ced into an acute, anteriorly directed. spiniform apophysis. 



The posterior division of the body (figs. 1. 2), about 

 twice as long as the anterior. has its foremost part scarcely 

 at all narrower than the latter, hut diminishes rapidly in 

 breadth posteriorly. For the rest, in ovigerous females it 

 is considerably broader than in males, and also provided 

 with deeper epimera. The dorsal surface is exceedingly 

 arcuate, and, like the carapax, very uneven. with more or 

 less distinctly marked sculpturing, in the form of irregular 

 elevations and depressions. Along the middle extends a. 

 sharply marked keel. which. on the two foremost segments. 

 rises into a high. compressed process. much the same in 

 cliaracter as the spines of the carapax. On the 3 following 

 segments the dorsal carina is. however. quite even. and on 

 the last segment occurs. above. 2 parallel carinæ. which 

 bound a canaliculated median area: each of the last-mentioned 

 carinæ form in their extreme hinder part two posteriorly 

 directed dentiform projections. 



The two foremost segments are considerably shorter 

 above than the others, and separated one from the other 

 by broad cutaneous spaces; hence the mobility between 

 these segments is very considerable. 



The epimera, particularly in ovigerous females (fig. 2), 

 are rather large, lamellar in shape, and along the margins 

 finely ciliated. They are deepest on the Ist segment 

 and exhibit in the middle of the foremost margin a small 

 dentiform projection. which meets the lateral carinæ on the 



