643 



Journ. A. N. S. Phil. vol. vii. p. 25,3. 1. 19. f. 23. PJiiUppi, Abbild. 

 Cijtk. t. 3. f. 4. Hanleij, Sp. of Shells, p. 104. 



Cyth. testa C. castrensi simili, seel magis ovali ; latere postico 

 magis elongato^ siibquadrato, margine vcntrali magis rotundato ; 

 maculis parvis, angulatim dispositis. 



Shell much more oval than C. castrensis, with the hinder side 

 longer and the ventral margin more bulging. The spots are 

 small, arranged so as to form angular lines. 



Sandwich Islands. 



106. Cytherjea fastigiata (pi. cxxxv. f. 158, 159), 

 Siowerhy, jun. 



Cyth. testa C. castrensi simili, sed ovali, postice attenuate, 

 subacurainata ; umbonibus parvulis ; lunula subcomplanata, griseo 

 angulatim variegata. 



Shell more oval than C. castrensis, and with the dorsal margin 

 much less sloped than C. tlgrina ; the umbones are much smaller 

 than in the former, with the lunule rather flatter ; the colouring 

 is arranged in large angles, either linear or broad, greyish-brown. 



Sydney ; Jukes. Cabinets of Cuming and Sowerby. 



107. Cyther^a tigrina (pi. cxxxv. f. 155, 156, 157), La- 

 7narck, Anim. s. vert. Ci/th. no. 34. V. castrensis, V. picta, et 

 V. ornata, var., nonnul. 



Cyth. testa crassa, subovali, ventricosa, medio Isevi, ad latera et 

 marginem ventralem undulatim sulcata ; umbonibas prominulis; 

 lunula subcomplanata ; margine dorsali declivi; latere antico 

 brevi, rotundato; latere antico subattenuato, ad terminum sub- 

 quadrato ; colore intiis croceo, extus albido, fusco-rubescente an- 

 gulatim varie disposito. 



Shell thick, rather oval, ventricose, smooth in the middle, but 

 grooved at the sides and towards the ventral margin ; whitish, 

 with various markings of dark reddish-brown placed angularly; 

 dorsal margins much sloped; posterior side rather attenuated and 

 squarish at the end. All the specimens have a tinge of yellow 

 inside, and var. fig. 155 has also a good deal of purplish-black near 

 the edge. 



Catbalonga, Island of Samar, Philippines. Cuming. 



108. Cyther^a Arabica (pi. cxxxv. f. 165, 166, 168), 

 Cliemn. Conch, f. 1968-70. 



Cyth. testa ovali, subquadrata, subdepressa, obtuse subundulatim 



