460 J'HOVKEDINdS OF THE NATIONAL MUHEUM. 



CYCLODESMUS PORCELLANUS Pocock. 



(!il<;lo(l(iHmiiH porc.cUaniiH I'ocock, .Joiirii. Liim. Soc., \H'X',, XX IV', j>. ."00, pi. xxxix, 

 fi^H. 1, la. 



Type. — IJritiHli MuHeuin. 

 Locality. — Jam ai c.a. 



CYCLODESMUS HUBBARDII Cook. 

 (I'lat*! XXXI, fiKH, 2ar-2(i.) 

 Cydodesmue Inihhardii Cook, I'.rjiiidtia, W.Hi, |». 28. 



Type.—^o. 082, U.S.N.M. 



Locality. — .laniaica. 



Length, al)Out 10 rniii.; vvidtli, 2 min. 



('olor in alcohol, vvliitish, appaiciiMy mottled with grayisli, aH the 

 delicate and tranHlneent exoskeleton allows the contents of the alimen- 

 tary canal to hIiow through. On drying the Hpecimens do not become 

 pure white, as in (L porccJlanuH, whicli has, notwithstanding itH smaller 

 Hi/.e, an api)ar(;ntly much firmer exoskeleton. 



Segments without a notch in the posterior margin at the base of the 

 carin;c. 



The hal>itiit of the 8i)ecimen8 is giv(;n as "a small damp cave, Mande- 

 ville, Jamaica," where tliey were collected by i\Ir. II. (j. Hubbard, for 

 whom tlie spe(;ies i.s named. The subterran(;an life may have reacted 

 upon this sp(!cies to render its exoskeleton thinner, colorless, and 

 transparent. .Specimens were compared with the types of (J. porcel- 

 lanuH, a smaller sj)ecies, di.^tinct in the notched segments. 



Family SPIIyKKIODESMIDyK (Humbert and Saussure). 



Sphnriodesiiiii llr'MisKUT and HAtT.ssuRK, Ifevin; ft Mag. Zool., 1869, p. 14f». 

 SplumodeHtnienH Hi'.mi'.kim and Hwrhuuk, I^tiidcH, 1872, ]». 20. 



Body rather small, less than three times as long as wide; dorsum 

 strongly convex, the carina*, very broad, curved downward so as to form 

 with the dorsum nearly a semicircle; surface of segments smooth and 

 l)olished. 



Antenna' rather slender, filiform, joints 2 to suber|ual, the fourth 

 being slightly shortest, arid the third and fifth shorter than the second 

 and sixtlr. 



I''irst segment lenticular in outline instead (>i' subelliptic lor rhorn- 

 boidal as in the other families. 



Second and third segments crescerrtic, the third larger' than the 

 second, but much exceeded by the greatly expanded fourth arrd fifrh 

 segments. 



Lateral carina; entire, triangular on anterior segirrents, quadrate on 

 posterior. 



