GENEPvAL ZOOLOGY. 



23 



beautiful species. Greatly to our delight, wo were fortunate enough to find 

 one example of S. Peroni with nearly the whole of the body preserved, but 

 the head and tentacles had been removed. rr , • 



Amoncrst the Prosobranchiate Gasteropoda we found ih^t Fusus Ha,ileyt 

 Angas, a shell common in Port Jackson, was exceedingly rare at the island but 

 of the genus Nassa three species were obtanied, ta mucronaaj. Adams 

 N. elegans, Kiencr, a West Australian shell, and N paupera, Goul . rhese 

 shells<ver; found on the Coral-reef, and on the rocky ^f g^«,^ J^;*;^,^; 

 but thev are all rare. Purpura suceincta, and its vars. textilosa niiA sU latus 

 are a Characteristic shells on the reef at the foot of Mount ^edgbird espec- 

 ially P. suceincta, with its coarse concentric coste. Next to TurU ^mper^al^s 



it is the largest univalve we have met with. ^'«1^'"'^ ""W.f^^V ^-IwLu 

 also obtainable, and is a very interesting shell from is wide ^^^^"^10^ 

 from our owa Coasts to those of Western Austraha Wherever te nature 

 of the shore permitted an inspection to be made we found SMnt^i claidea 

 Duclos very common between tide marks on rocks and stones bo also was 

 ZiS^elT^daMsi^ tritonifi»nis, Blainv. Could an examination 0^ U^e 

 middle portions and outer face of the reef have been 7<iero/«« would 

 doubtless have proved of more common occurrence. As \ ^^«' ° ^ ™ 

 specimens of Valuta nucleus were met with On the other ^^f ^ JDO* «ie 

 Coral-reef, and on the basaltic reefs and edges on the east coa t Cow es 

 were tolei-ably abundant. G^iprcm anmdus is common, 0. «-^f ^^f"/^^' 

 Linn., is modei-atelT so, but 0. staphjUa, Lmn. is not by any means plentitul. 

 0. cranes, Linn., occurs in numbers, but Ofehna, Gray is very raje M,. 

 Brazier has recognized what he believes to be one example ot Gypr<Ba moncta, 



^Zanudes olthov exists, or has existed at Lord Howe. ^ single d^^^^^^ 

 snecimen of Potamides ehininus, Brug., so common on our estuaiine shores 

 w'as™ed u^ It is remarkable that a, mollusc occurring in Bueh numbers 

 ^vhen it is met with, should be so rare in the present instance. It ^^ay er- 

 haps indicate one of those mysterious disappearances of a specie, ot which 

 several partial instances have occurred m Port .) ackson. ^ 



The MitridiB are well represented by the genera 2htra Engina and 

 Ooi^jX especially the latL. Of the first genus there is i^^^.«^^^^^^^^^ 

 Cham P arare shell, and another peculiar small species mottled black and w hit«. 

 BoXspedes of En.ina are rare! whichis to be regretted,as the va«.Z.^« 

 of E. Imeata. Eeeve, is a small but very pretty ^^ell, marked jith dark 

 spiral lines and dots. GohmMla versicolor, Sby occurs but nnhke those ot 

 this coast and Northern Australia, the individuals are all small. 6. lyleit. 

 Gray, is tolerably common, but the other species are not so. bpecies 

 ofthe sub-genus J5/soiJ«. was obtained, which may perhaps be new^ /Je 

 reason advanced in the case of the Volutes will also probably ^^cco nt foi the 

 paucity of the Cones, as three species only were obtained. G^nusm^'^ 

 Lamk., found under stones and blocks, is the most abundant. G-^^l^^'^ 

 Brug., the next so, whilst G. coronatus, Di w is liinited m nnmbers 

 Amongst truly tropical shells we obtained at Ned's Beach a ^w examges 

 oiScalariaperpleJa, Pease. The Cerithiida, are represented m the collection 

 by dead shells of Lampania australu, Quoy, all of them distorted. Jiither 

 it must have entirelv got out of its latitude or the immediate physical 

 conditions surrounding the settlement must have been uncongenial. 



One of the commonest shells at Lord Howe, but very local m its distribu- 

 tion, is Planaxis mollis, Sby., always found in some hollow space under a 

 large stone, associated in large numbers. We obtained a quantity m this 

 way on the north-west extension of the Coral-reef m N orth Bay. 



