CATALOGUE SHELLS. 



551 



Habitat ad oras insulce Tierra del Fuego et in freto Magellanico, 

 Mus. Brit., nost., Brod, 



Shell oblong-ovate, and generally of a chestnut red, and the 

 granulose ligament black ; the colour of the younger specimens 

 is more brilliant, and sometimes interspersed with yellow. Middle 

 valves slightly toothed, and very delicately lineated, the lines 

 forming an obtuse angle in the direction of the axis of the shell ; 

 the lateral compartments are marked with deeper strisa or grooves, 

 radiating from the upper angle to the base, v/hich, crossing the 

 transverse markings of the valve, have a reticulated appearance : 

 the anterior and posterior valves are radiated with fine lines. 



This Chiton was discovered by Mr. Bowen, surg6on of the 

 Beagle, by whom it was presented to me. The specimen was 

 sent home among a collection of Natural History, transmitted in 

 the year 1827. 



22. Fissure LL A coarctata. 



J^. testa ovatdf antice atteniiatd, elevatd ; radiis frequentibus elevatis ; 

 interne virescenti ; foramims margine externa jiixta mediwn coarc- 

 tatOy subdentato ; hug 2-^^ ; lat, 1 j| ; alt. ; poll. 

 Habitat ad Portum Praya. Mus. Brit., nost. 



23. Helix translucens. 

 H. testd subglobosd, translucente^ levissime transversirri striata; 

 anfractu basalt lined hngitudinali castaned sub*medid or?iato ; 

 long. J J ; lat. ; poll 



Habitat ad Rio de Janeiro, Mus. Brit., tiost., Brod. 



24f. Helix pusio. 

 H, testd 7'otundo-co7nplanatd, creberrime striatd, translucente, maculis 

 castaneo-rtifis ornatd ; long. -^^ ; lat. -^^ ; poll. 

 Habitat ad Juan Fernandez. Mus. Brit., nost., Brod, 



23. Helicina sordida. 

 H. testd glohoso-conoided ; anjractibus 7'otundatis longitudinaliter 

 striatis ; operculo castaneo ; long. | paulo plus ; lat paulo 

 plus ; poll. 



Habitat ad Rio de Janeiro. Miis. Brit., nost. 

 The colour of this shell is of a dirty yellowish white, with 

 a slight tinge of diaphanous violet within the margin of the lip. 



26. Pupa subdiaphana.— No. 194. MSS. 



P. testd cylindraced, alba, subdiaphand, iransucrsim creberrime sub- 

 striatd ; long.. | paulo minus ; lat. -^^ paulo minus ; poll. 



