G A L E M M A. 



Plate I. 



Genus GALEO.MMA, Turion. 



Testa (F(]tiiralris, suhaquilateralis, transverse ovata, 

 (Hvai-icatirn grauoso-striata, ad mnrgincm veiitralein 

 late ht'ans. Fossiila cartHaijiniftva iiij'rd vmhones 

 parva. Impressioiies musculares ihia; rotund/', 

 fiiijirc.^'sio pallii simplex. 



Shell cquivalve, sub(>(iuilator;il, transversely ovate, 

 diver;z:i-'ntly granosely striated, widely gaping at 

 the ventral margin. Cartilaginous pit under tlie 

 miiboes small. Muscular im])re.ssions two, 

 rounded. Impression of the mantle pimple. 



Comparing this genus with Sriiuillu, we lind that it 

 diflcrs in liaving uo hinge-teeth, in having a sculptured 

 suri'ace, and always a very wide hiatu.s at the ventral 

 margin. The type species, Galeonana Turttmi, is found 

 in the Chamiel Islands, as well as on some southern 

 shores of Great Britain ; another species is Australian, 

 and all the rest were collected by Mr. Cuming, in the 

 Philippine Islands. The animal attaching itself to 

 rocks by a bysus lies with its valves spread open and 

 their dorsal edge uppermost. 



Species 1. (Fig. a, b, c, Mus. Nobis.) 



Galeom.m.\ Tuijtoni. GaL testa alM, elonfjata, vtrin- 

 qve actimtiiatd; conspioie striis elcvatis, granosis, 

 irrei/iilariter diverijentihas sciilptd ; valvis in medio 

 pLniinque contractis, late hiantibus. 



TuiiTox's Galeomma. Shell white, elongated, acu- 

 minated at both ends ; conspicuously sculptured 

 with raised granose, irregularly divergent stria; ; 

 valves generally contracted in the middle, broadly 

 gaping. 



SowERBY. Genera of Shells. 



Hab. Guernsey ; lOxmouth. 



The slight central contraction in the valves seen in 

 some specimens, is not visible in all. 



Species 2. (Mus. Brit.) 



rAUCISTKIATA. Gol. tCstU puUid'c flllc 



enviter striata, medio rontrcuid; ten 



later 



Hi,) loun 



nlbus oi 

 niiistiori 



latere posticci inagis injlulo. 

 The ke\v-.stuiati;i) Gai.eu.mma. Shell pale fulvous, 



finely striated, contracted in the middle ; ends 



obtuse; anterior side a littlQ longer, narrower; 



posterior side more inllated. 

 Desiiayes. Proc. Zool. Soc, 185 J, p. 170. 

 Ilab. Isl. Samar, Philippines. 



The sculpture is so fine tliat it only appeal's in parts 

 unless closely examined. 



very tinel\ 



Species 3. (Mus. Brit.) 

 Galeomma anci'sta. Gal. tesla alhida, 



striata ; elongatd, emgustd, termiinhiis . 



margiiie venirali rectiuseulo. 

 The NAunow Galeomma. Shell whitish, 



striated ; elongated, narrow, ends rathi 



ventral margin rather straight. 

 Dksiiayes. Proc. Zool. Soc, 1855, p. 170. 

 Ilab. Isl. Bohol, Philippines. 



Species 4. (Mus. Brit.) 



Galeomma foilmosa. Gal. testd aurantid, ehmgatd, 

 utrinqne acuminata, ienuiter striatd, pauli} ante me- 

 dium contraetd ; latere postico longiori viagis inJlato_ 



The beautiful Galeomma. Shell orange, elongated, 

 acuminated at each end, finely striated, contracted 

 a little before the middle ; posterior side a little 

 longer and more inllated. 



Desiiayes. Proc. Zool. Soc, 1855, p. 170. 



Hab. Aiistralia. 



The form of this species resembles that of the typical 



one. The colour of the finer stria disliiitiuishes it. 



February, 1874. 



