( 



luJiuti Sta^.kid Biirnacles. 393 



extremity almost straight; bristles feel)ly diflcrcutiated. 

 Mandibles m itb 4 main teetb : the iniiennost very Iduiit, 

 Irinj^etl with short bristles, the others pointed ; the outermost 

 larj;e, widt'Iy separated Irom the next ; a small subsitliary 

 tooth near the base of the inner niar^nn of the former. The 

 whole of the month-parts eovcred with minute star-shaped 

 jjigment-cells. 

 Dinu'iisions. — 



nun. 



I.eiiirth of cnpit Ilium ("io 



Itrentllh 40 



Li.iij,'tli of peduncle '2'2 



Localities. — Gulf of Manaar, between 880 and 859 fath. ; 

 Andaman Sea, DGO lath. On j^lassy hhvcs of Ifi/a/oncmu and 

 on Gorgoniid skeleton, together with S. Gruvc/ii ; three 

 si)eeimeus. 



This species, like the last, is somewhat variable as regards 

 the capitulum and peduncle. On the whole, the structure of 

 the body is constant ; but the length of the anal appendages 

 varies considerably. 



ScaJpellum laccadiviciim, sp. n. 



Cff/^jV/z/j/wregidai'ly oval, laterally compressed, with 13 plates, 

 which are comj)letely covered by a fine, hairless, grey mem- 

 brane ; those of the lower whorl completely, the remainder 

 imperfectly calcified. Carina simply bowed, with umbo sub- 

 terminal, in contact with the terga above or just entering 

 between them ; the dorsal surface flat or concave, with well- 

 defined borders, sides narrower below than above, concave 

 outwards below, becoming convex above, with dorsal ridges. 

 Terya almost triangular ; the seutal margin excavated, but 

 not very boldly; the occludent margin slightly, regulaily con- 

 vex outwards ; the earinal margin feebly concave towards the 

 carina, with le>s than a third ol' its length above the umbo of 

 the latter ; umbo terminal, hardly ntrovertcd. Scuta sub- 

 triaiignlar ; the hitcral margin excavated, with the tooth 

 above the excavation blunt, short, simple; the occludent 

 margin regidarly convex outwards, slightly overla|)ping that 

 of the terga above. Upper latus large; the ])erfectly calcified 

 j)art irregularly triangular, constricted above ; the b..sc 

 almost straiuht, without a notch ; the margin dircetitl 

 towards the seutal margin of the tergum parallel or abm)st 

 jiarallel to and sep:irated from it throughout. Rostral latna 

 (|uadrangular, meeting its fellow below the aperture, deeju-r 

 behind than at this jioiiit; no trace of a rostimn. Infra- 



