SYKES : MALACOLOGICAL NOTES. 



165 



sculptured with bold, slightly granulose ridges, this sculpture becoming 

 more obsolete and the ridges breaking up into granules, as we proceed 

 from the tail to the head-valve. 



Fig. 2.— Cryptoplax, sp. Fig. 3. — Head -valve of same. 

 Figs. 4 and 5. — Seventh and eighth valve. 



On comparing this species with young specimens of C. siriatus 

 (Lamk.), I have ,been unable to find specific characters sufficient to 

 justify the description of it as distinct. Of course with only one 

 specimen, it is by no means easy to arrive at the true specific value, 

 but the occurrence of any specimen of the genus so far from the 

 known habitat is of sufficient interest to be worthy of record. 



Should more material come to hand, I shall hope to return to the 

 subject. 



3. Description of Aeroptyehia pyramidalis, n. sp. 



Testa aperte umbilicata, pyramidata, turbinata, solidiuscula, leviter 

 striata, (detrita) castanea, maculis albidis tessellata, linea unica 

 inconspicue nigro-castanea cincta ; anfr. 5^, plano-convexi, ultimus 

 turgidus ; apertura subverticalis, subcircularis, supra angulum obtusum 

 formans, peristomate incrassatulo, subreflexo. 



Alt. 15 ; diam. max. 14, min. 11 millim. 



Hcih. — Madagascar. 6. 7. 



Figs. 6 and 7. — Aeroptyehia pyramidalis, n. sp. 



In colour pattern somewhat recalling A. reticulata (Ad. and Rve.), 

 but may be severed from young specimens of that species, by the 

 whorls being much flatter, the shell more elevated and thicker, and 



