140 Scientific Intelligence. 



\ Antennae longse, flagello crasso rigidoque, obsolete articulate 



Antennae styliformes, rectae. Pedes filiformes, non 

 prehensiles, sex postici praelongL Clydonia (Dana). 



Fam. IV. IcilidjE. 



1. Pedes postici sublamellati. Pterygocera (Lat.), 



2. Pedes toti vergiformes, nulli prehensiles. IciUus (Dana). 



Fam. V. Chelurid^:. 



Abdomen ad extremitatem crasse styliforme, (seg- 

 mentis quarto quinto sextoque in articuluni stybformem 



coalitis). 



Fam. VI. Dulichid^. 



Chelura* (Philippi). 



Caprelliformes, Abdomen 5-articulatum. Segmenta 

 thoracis sextum septiniumque coalita. Dulichia\ (Kroyer) 



2. 



I 



Feb. 28, 1849.) — Alimentary substances have been arranged by some 

 recent chemists in four groups : — substances soluble by themselves and 

 consequently absorbed directly by the veins and the digestive tube ; amy- 

 laceous substances converted into sugar ; fibrinous matters requiring a 

 special fermentation in order to become soluble; and fatty substances, 

 evidently designed to pass into the chyle and giving it its most decided 

 characters. The recent researches of MM. Bouchardat and Sandras, 

 Mialhe, Bareswill and Bernard himself, have placed beyond doubt the 

 existence of a ferment fitted to change fecula to sugar in some of the 

 liquids which mixed with the aliment. They have shown that the gas- 

 tric juice has for its primary object the digestion of azotized substances. 

 It remained still to discover the agent operating in the formation of 

 chyle properly so called. M. Bernard argues on the following grounds, 

 suggested by experiments, that this remarkable function belongs to the 

 pancreatic juice. 



sunt armati eonicis ; tuberculus molaris dentibus confertissimis instruct us. Labium 

 ■superius breve, depressum latissimum, marline anteriori medio inciso ; labium infe- 

 rius quatuor compositum laminis setosis. Laminm maxMlares pedum maxillarium 

 dentibus armatae validis ; unguis palpi a pice setosus. Pes primi parts robust issimus, 

 manu subcheliformi ; pes secundi paris gracilior, manu carens subcheliformi, pedes 

 3tii, 4tique paris pergraciles; pedes 5ti, 6ti, 7mique paris graciles femoribus parum 

 dilatatis. Pedes abdominales lnii 2di et 3tii paris natatorii, breves sed robustis- 

 simi; 4ti, 5tique paris saltatorii, validi ; 6ti paris fere rudin ntares, natatorii. Epim- 

 era minima fere e vane seen tia." 



* Philippi, Archiv fur Nature, 1839. Also on Chelura terebrans, G. J. Allman, 

 Ann. and Mag. Nat, Hist., xix, 361, June, 1847. 



f Kroyer, Tiik, N. R., i, 512, 1845, and Yoy. Scand, etc., pi. 22, %. 1, la-ln. 

 " Corpus valde elongafom gracili Antennae lomrissiniae (imprimis rop e r io reg) sub- 



pediforme9; supcriores iagello instructs appendicular!. Oculi prominent issi mi, acu- 

 liiiuati. Pedes lnii paris compressi, manu (articuk) 4to) magna, ungueque biartic- 

 ulato instructi (qui unguis juticulo 5t«> titoque junctifl crHcitur). Pedes 2di paris manu 

 instructi subcheliformi (qua? apud mares maxima est). Pedes 3tii 4tique paris minimi, 

 fere riliformes, invicem ejusdera fermti longitudine et forma. Pede- 6ti 6ti 7mique 

 paris elongati, lineares (femore non dilatato) prehensiles. Sextus thoracis annulus 

 cum septimo coalitus ut difficilius distinguantur. Epimera nulla vel prorsus rudimen- 

 taria. Abdomen quinque modo compositum annulis et quinque prreditum pedum 

 paribus, quorum tria anteriora natatoria, duo posteriora saltatoria sunt." 

 \ See a notice of a previous memoir, in this Journal, vol vi, p. 276, 1848. 



