SCIENCE-GOSSIP. 



7 1 



received with P. magna, as above mentioned, I 

 propose to distinguish as Plectopylis lissochlamys. 

 Two specimens were sent to me by Miss Linter. 

 Dr. von Mollendorff, the German Consul in 

 Manila, Luzon, however, has obligingly sent me 

 for inspection several specimens of Plectopylis, 

 amongst which are two (labelled Plectopylis refuga) 

 which I refer to this new species. Plectopylis 

 lissochlamys differs from P. magna in being much 

 smaller and shining, as well as paler in colour ; the 

 shell in shape and texture resembling Plectopylis 

 pulvinaris, which, however, is a dextral shell (ante 

 vol iii., page 1S0, fig. 25). It is more solid and 

 darker in colour than P. ponsonbyi and it is more 

 coarsely ribbed : the two last whorls increase 

 more suddenly, and the last is not constricted 

 behind the peristome as is the case in P. ponsonbyi. 

 The two parietal plates (see fig. 53^) are much 

 thinner, and the anterior ridges of the anterior 

 plate much shorter and slighter than those of 

 P. ponsonbyi ; they are parallel instead of convergent 

 as in P. magna. A comparison of the figures will 

 indicate differences in the palatal armature. The 

 specimen figured is in my collection and measures 

 19 millimetres in diameter. Figs. 531W are natural 

 size, while figs. 53d-/ are magnified. Fig. 53d 

 shows the parietal and palatal armature from the 



sideration, and P. trocliospira and P. polyptychia, both 

 of which latter will be dealt with in a future paper. 

 As Plectopylis quadras! has never been figured, 1 



it ' \l.\ 



F'»S- ii.—1'ltctopylii lissochlamys. 



posterior side ; fig. 53/ a part of the parietal wall 

 with its plates ; and fig. 53/ the inside of the outer 

 wall with its folds and denticles. 



;^s. 540-1) was described by 



n Mollendorff, in the " Nachrichtsblalt 



• utschen Malakozoologischen Gesell chaft," 



p. 172. It was collected near the 



of Siamsiam, in the Province ol 



1'hilippine Island . Only three species of 



hitherto been recorded from the 



Philippine Islands, viz . the species now undl 





■ 



| 

 rlorly, with <*" 

 . on* a>' 



17 mini. 





Fig. 54. — Plectopylis quadrasi. 



have much pleasure in now illustrating it. The 

 shell is dextral, openly umbilicated, depressed 

 conical, thin, dark horny brown, regularly ribbed 

 above and finely striated below. The suture is 

 impressed, and the spire a little elevated. It is 

 composed of six rounded whorls, which increase 

 very slowly and regularly, the last not descending 

 in front, keeled at the periphery, and obtusely 

 angled around the umbilicus, which is deep and 

 moderately wide. The aperture is diagonal, irregu- 

 larly heart-shaped, and the peristome is brown, 

 a little thickened and well reflexed, the margins 

 being a little .convergent and united by a slightly 

 elevated, sinuous ridge. The parietal armature 

 consists of two parallel horizontal folds, which 

 extend over nearly half a whorl, the upper one 

 being the strongest and united to the ridge at the 

 aperture, while the lower one is thinner and does 

 not reach quite so far ; at their posterior termina- 

 tions these two folds are united by a slight vertical 

 ridge, which projects a Utile beyond the upper 

 fold (see fig. 54c, which shows the shell with the 

 outer wall removed as far as the peristome). The 

 palatal armature is composed of three short, 

 parallel horizontal folds at one-third of the cir- 

 cumference from the mouth (see fig. 54c, which 

 shows the shell with part of the outer wall re- 

 moved, so as to expose the anterior view of the 

 palatal folds, and fig. 541/, which shows the entire 

 shell with the palatal folds as they appear through 

 the shell-wall). The two specimens figured are 

 from Palanan, North Luzon, and are in my 

 lion . they measure, major diameter, (-3 milli- 

 : minor diameter, 3 millimetres; axis, 175 

 millimetres. All the figures are enlargi 1 



1 1 <■ be continued, 1 



Kano in Britain.— Will any varietj ol 



iup ol animal . bear the varying 1 1 ea ol 



1 < limate with Iti ran < ol hi 'i and 



. old ; 1 ipo ially, withoul I hi 



application oi artifii lal hi at. Id a 1 « 



11, ,,, 1 / Barbel 



